java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-10-01 00:57:37,426 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-01 00:57:37,428 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-01 00:57:37,441 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-01 00:57:37,501 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-01 00:57:37,520 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-01 00:57:37,520 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-01 00:57:37,521 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-01 00:57:37,522 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-01 00:57:37,523 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-01 00:57:37,523 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-01 00:57:37,523 INFO L133 SettingsManager]: * Use SBE=true [2018-10-01 00:57:37,524 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-01 00:57:37,525 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-01 00:57:37,525 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-01 00:57:37,525 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-01 00:57:37,525 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-01 00:57:37,525 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-01 00:57:37,526 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-01 00:57:37,526 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-01 00:57:37,526 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-01 00:57:37,526 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-01 00:57:37,527 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-01 00:57:37,528 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-01 00:57:37,528 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-01 00:57:37,528 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-01 00:57:37,528 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-01 00:57:37,528 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 00:57:37,529 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-01 00:57:37,529 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-01 00:57:37,529 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-01 00:57:37,529 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-01 00:57:37,529 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-01 00:57:37,530 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-01 00:57:37,530 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-01 00:57:37,530 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-01 00:57:37,590 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-01 00:57:37,605 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-01 00:57:37,611 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-01 00:57:37,613 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-01 00:57:37,613 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-01 00:57:37,615 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl [2018-10-01 00:57:37,615 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl' [2018-10-01 00:57:37,665 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-01 00:57:37,668 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-01 00:57:37,669 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-01 00:57:37,669 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-01 00:57:37,670 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-01 00:57:37,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:57:37" (1/1) ... [2018-10-01 00:57:37,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:57:37" (1/1) ... [2018-10-01 00:57:37,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-01 00:57:37,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-01 00:57:37,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-01 00:57:37,712 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-01 00:57:37,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:57:37" (1/1) ... [2018-10-01 00:57:37,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:57:37" (1/1) ... [2018-10-01 00:57:37,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:57:37" (1/1) ... [2018-10-01 00:57:37,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:57:37" (1/1) ... [2018-10-01 00:57:37,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:57:37" (1/1) ... [2018-10-01 00:57:37,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:57:37" (1/1) ... [2018-10-01 00:57:37,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:57:37" (1/1) ... [2018-10-01 00:57:37,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-01 00:57:37,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-01 00:57:37,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-01 00:57:37,739 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-01 00:57:37,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:57:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 00:57:37,810 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-01 00:57:37,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-01 00:57:37,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-01 00:57:38,074 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-01 00:57:38,075 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:57:38 BoogieIcfgContainer [2018-10-01 00:57:38,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-01 00:57:38,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-01 00:57:38,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-01 00:57:38,079 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-01 00:57:38,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:57:37" (1/2) ... [2018-10-01 00:57:38,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed811b1 and model type ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 12:57:38, skipping insertion in model container [2018-10-01 00:57:38,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:57:38" (2/2) ... [2018-10-01 00:57:38,083 INFO L112 eAbstractionObserver]: Analyzing ICFG ArrayInit02.bpl [2018-10-01 00:57:38,092 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-01 00:57:38,100 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-01 00:57:38,149 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-01 00:57:38,150 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-01 00:57:38,150 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-01 00:57:38,150 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-01 00:57:38,151 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-01 00:57:38,151 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-01 00:57:38,151 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-01 00:57:38,151 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-01 00:57:38,151 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-01 00:57:38,166 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-10-01 00:57:38,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-01 00:57:38,173 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:38,174 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-01 00:57:38,175 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:38,181 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:38,182 INFO L82 PathProgramCache]: Analyzing trace with hash 900035954, now seen corresponding path program 1 times [2018-10-01 00:57:38,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:38,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:38,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:38,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:57:38,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:38,449 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 00:57:38,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-01 00:57:38,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-01 00:57:38,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-01 00:57:38,464 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:38,466 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2018-10-01 00:57:38,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:38,794 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2018-10-01 00:57:38,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 00:57:38,795 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-01 00:57:38,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:38,808 INFO L225 Difference]: With dead ends: 26 [2018-10-01 00:57:38,808 INFO L226 Difference]: Without dead ends: 13 [2018-10-01 00:57:38,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:57:38,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-01 00:57:38,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2018-10-01 00:57:38,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-01 00:57:38,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2018-10-01 00:57:38,847 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2018-10-01 00:57:38,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:38,848 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2018-10-01 00:57:38,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-01 00:57:38,848 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2018-10-01 00:57:38,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-01 00:57:38,849 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:38,849 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-01 00:57:38,849 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:38,850 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:38,850 INFO L82 PathProgramCache]: Analyzing trace with hash 429804648, now seen corresponding path program 1 times [2018-10-01 00:57:38,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:38,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:38,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:38,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:57:38,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:38,948 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 00:57:38,949 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-01 00:57:38,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-01 00:57:38,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-01 00:57:38,951 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:38,951 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 4 states. [2018-10-01 00:57:39,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:39,268 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-10-01 00:57:39,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 00:57:39,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-10-01 00:57:39,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:39,269 INFO L225 Difference]: With dead ends: 25 [2018-10-01 00:57:39,270 INFO L226 Difference]: Without dead ends: 23 [2018-10-01 00:57:39,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:57:39,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-01 00:57:39,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-01 00:57:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-01 00:57:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2018-10-01 00:57:39,277 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 9 [2018-10-01 00:57:39,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:39,277 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2018-10-01 00:57:39,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-01 00:57:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2018-10-01 00:57:39,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-01 00:57:39,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:39,278 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-01 00:57:39,279 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:39,279 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:39,279 INFO L82 PathProgramCache]: Analyzing trace with hash 429806570, now seen corresponding path program 1 times [2018-10-01 00:57:39,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:39,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:39,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:39,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:57:39,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-01 00:57:39,329 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 00:57:39,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-01 00:57:39,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-01 00:57:39,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-01 00:57:39,330 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:39,330 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 3 states. [2018-10-01 00:57:39,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:39,388 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2018-10-01 00:57:39,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-01 00:57:39,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-10-01 00:57:39,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:39,389 INFO L225 Difference]: With dead ends: 24 [2018-10-01 00:57:39,389 INFO L226 Difference]: Without dead ends: 13 [2018-10-01 00:57:39,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 00:57:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-01 00:57:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2018-10-01 00:57:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-01 00:57:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-10-01 00:57:39,395 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-10-01 00:57:39,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:39,395 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-10-01 00:57:39,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-01 00:57:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-10-01 00:57:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-01 00:57:39,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:39,396 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-01 00:57:39,396 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:39,397 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:39,397 INFO L82 PathProgramCache]: Analyzing trace with hash -2090155286, now seen corresponding path program 1 times [2018-10-01 00:57:39,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:39,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:39,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:39,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:57:39,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:39,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:39,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:39,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:57:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:39,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:39,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:39,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-10-01 00:57:39,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 00:57:39,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 00:57:39,954 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:39,955 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2018-10-01 00:57:40,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:40,900 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2018-10-01 00:57:40,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 00:57:40,903 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2018-10-01 00:57:40,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:40,903 INFO L225 Difference]: With dead ends: 26 [2018-10-01 00:57:40,904 INFO L226 Difference]: Without dead ends: 19 [2018-10-01 00:57:40,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 00:57:40,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-01 00:57:40,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-10-01 00:57:40,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-01 00:57:40,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-01 00:57:40,908 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2018-10-01 00:57:40,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:40,908 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-01 00:57:40,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 00:57:40,909 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-01 00:57:40,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 00:57:40,909 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:40,909 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-01 00:57:40,910 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:40,910 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:40,910 INFO L82 PathProgramCache]: Analyzing trace with hash -368470767, now seen corresponding path program 1 times [2018-10-01 00:57:40,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:40,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:40,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:40,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:57:40,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:40,996 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:40,996 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:41,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:57:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:41,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:41,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:41,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-01 00:57:41,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 00:57:41,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 00:57:41,099 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:41,099 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2018-10-01 00:57:41,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:41,340 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-10-01 00:57:41,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 00:57:41,340 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-01 00:57:41,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:41,342 INFO L225 Difference]: With dead ends: 31 [2018-10-01 00:57:41,342 INFO L226 Difference]: Without dead ends: 19 [2018-10-01 00:57:41,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:57:41,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-01 00:57:41,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-10-01 00:57:41,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-01 00:57:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-10-01 00:57:41,348 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2018-10-01 00:57:41,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:41,348 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-10-01 00:57:41,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 00:57:41,348 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-10-01 00:57:41,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-01 00:57:41,349 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:41,349 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-01 00:57:41,349 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:41,349 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:41,350 INFO L82 PathProgramCache]: Analyzing trace with hash -256855911, now seen corresponding path program 2 times [2018-10-01 00:57:41,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:41,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:41,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:41,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:57:41,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:41,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:41,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:41,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:41,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:57:41,533 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:57:41,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:41,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:41,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:41,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-10-01 00:57:41,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-01 00:57:41,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-01 00:57:41,765 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:41,765 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 15 states. [2018-10-01 00:57:43,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:43,251 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2018-10-01 00:57:43,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-01 00:57:43,252 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2018-10-01 00:57:43,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:43,253 INFO L225 Difference]: With dead ends: 43 [2018-10-01 00:57:43,253 INFO L226 Difference]: Without dead ends: 27 [2018-10-01 00:57:43,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 00:57:43,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-01 00:57:43,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-10-01 00:57:43,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 00:57:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-10-01 00:57:43,260 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2018-10-01 00:57:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:43,261 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-10-01 00:57:43,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-01 00:57:43,261 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-10-01 00:57:43,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-01 00:57:43,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:43,262 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-10-01 00:57:43,262 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:43,263 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:43,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1324912968, now seen corresponding path program 3 times [2018-10-01 00:57:43,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:43,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:43,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:43,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:43,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:43,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:43,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:43,458 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:57:43,469 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-01 00:57:43,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:43,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:43,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:43,612 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-10-01 00:57:43,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-01 00:57:43,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-01 00:57:43,613 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:43,614 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 14 states. [2018-10-01 00:57:44,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:44,747 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-10-01 00:57:44,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-01 00:57:44,755 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2018-10-01 00:57:44,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:44,757 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:57:44,757 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 00:57:44,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:57:44,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 00:57:44,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-01 00:57:44,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 00:57:44,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-01 00:57:44,764 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-10-01 00:57:44,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:44,764 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-01 00:57:44,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-01 00:57:44,764 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-01 00:57:44,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-01 00:57:44,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:44,765 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-01 00:57:44,766 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:44,766 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:44,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1588570591, now seen corresponding path program 4 times [2018-10-01 00:57:44,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:44,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:44,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:44,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:44,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:44,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:44,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:44,897 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:57:44,923 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:57:44,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:44,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:45,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:45,146 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-10-01 00:57:45,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-01 00:57:45,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-01 00:57:45,147 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:45,147 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-10-01 00:57:45,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:45,808 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2018-10-01 00:57:45,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 00:57:45,809 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-10-01 00:57:45,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:45,810 INFO L225 Difference]: With dead ends: 60 [2018-10-01 00:57:45,810 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 00:57:45,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 00:57:45,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 00:57:45,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2018-10-01 00:57:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-01 00:57:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-01 00:57:45,817 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-10-01 00:57:45,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:45,817 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-01 00:57:45,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-01 00:57:45,818 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-01 00:57:45,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-01 00:57:45,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:45,819 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-01 00:57:45,819 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:45,819 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:45,819 INFO L82 PathProgramCache]: Analyzing trace with hash 366737255, now seen corresponding path program 5 times [2018-10-01 00:57:45,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:45,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:45,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:45,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:45,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:46,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:46,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:46,075 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:57:46,088 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-01 00:57:46,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:46,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:46,783 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:46,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-10-01 00:57:46,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-01 00:57:46,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-01 00:57:46,784 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:46,784 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 17 states. [2018-10-01 00:57:48,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:48,622 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2018-10-01 00:57:48,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-01 00:57:48,622 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-10-01 00:57:48,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:48,624 INFO L225 Difference]: With dead ends: 64 [2018-10-01 00:57:48,624 INFO L226 Difference]: Without dead ends: 50 [2018-10-01 00:57:48,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-10-01 00:57:48,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-01 00:57:48,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2018-10-01 00:57:48,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-01 00:57:48,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-10-01 00:57:48,631 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2018-10-01 00:57:48,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:48,631 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-10-01 00:57:48,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-01 00:57:48,631 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-10-01 00:57:48,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-01 00:57:48,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:48,632 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-01 00:57:48,633 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:48,633 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:48,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1079885042, now seen corresponding path program 6 times [2018-10-01 00:57:48,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:48,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:48,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:48,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:48,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:48,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:48,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:48,763 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:57:48,784 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-01 00:57:48,785 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:48,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:49,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:49,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-10-01 00:57:49,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-01 00:57:49,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-01 00:57:49,085 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:49,085 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 17 states. [2018-10-01 00:57:49,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:49,733 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-10-01 00:57:49,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:57:49,734 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2018-10-01 00:57:49,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:49,736 INFO L225 Difference]: With dead ends: 75 [2018-10-01 00:57:49,736 INFO L226 Difference]: Without dead ends: 40 [2018-10-01 00:57:49,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:57:49,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-01 00:57:49,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2018-10-01 00:57:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:57:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-01 00:57:49,742 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2018-10-01 00:57:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:49,743 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-01 00:57:49,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-01 00:57:49,743 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-01 00:57:49,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-01 00:57:49,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:49,744 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-01 00:57:49,744 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:49,744 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:49,745 INFO L82 PathProgramCache]: Analyzing trace with hash -921359226, now seen corresponding path program 7 times [2018-10-01 00:57:49,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:49,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:49,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:49,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:49,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:49,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:49,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:49,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:57:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:49,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:50,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:50,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2018-10-01 00:57:50,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-01 00:57:50,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-01 00:57:50,302 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:50,302 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2018-10-01 00:57:52,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:52,741 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2018-10-01 00:57:52,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-01 00:57:52,742 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2018-10-01 00:57:52,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:52,743 INFO L225 Difference]: With dead ends: 79 [2018-10-01 00:57:52,743 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:57:52,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 00:57:52,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:57:52,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2018-10-01 00:57:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-01 00:57:52,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-01 00:57:52,751 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2018-10-01 00:57:52,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:52,752 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-01 00:57:52,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-01 00:57:52,752 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-01 00:57:52,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-01 00:57:52,753 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:52,753 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-01 00:57:52,753 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:52,753 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:52,753 INFO L82 PathProgramCache]: Analyzing trace with hash 451793069, now seen corresponding path program 8 times [2018-10-01 00:57:52,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:52,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:52,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:52,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:57:52,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:53,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:53,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:53,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:57:53,175 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:57:53,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:53,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:53,333 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:53,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-10-01 00:57:53,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-01 00:57:53,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-01 00:57:53,334 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:53,335 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2018-10-01 00:57:53,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:53,998 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2018-10-01 00:57:53,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-01 00:57:53,998 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2018-10-01 00:57:53,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:53,999 INFO L225 Difference]: With dead ends: 90 [2018-10-01 00:57:54,000 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:57:54,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 00:57:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:57:54,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-10-01 00:57:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-01 00:57:54,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-10-01 00:57:54,008 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2018-10-01 00:57:54,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:54,008 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-10-01 00:57:54,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-01 00:57:54,008 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-10-01 00:57:54,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-01 00:57:54,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:54,009 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-01 00:57:54,010 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:54,010 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:54,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1868574667, now seen corresponding path program 9 times [2018-10-01 00:57:54,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:54,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:54,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:54,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:54,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 5 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:54,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:54,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:54,319 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:57:54,357 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-01 00:57:54,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:54,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 50 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:54,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:54,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2018-10-01 00:57:54,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-01 00:57:54,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-01 00:57:54,787 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:54,787 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 31 states. [2018-10-01 00:58:00,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:00,165 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-10-01 00:58:00,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-01 00:58:00,165 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2018-10-01 00:58:00,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:00,167 INFO L225 Difference]: With dead ends: 116 [2018-10-01 00:58:00,167 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:58:00,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time [2018-10-01 00:58:00,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:58:00,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2018-10-01 00:58:00,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-01 00:58:00,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-01 00:58:00,177 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 44 [2018-10-01 00:58:00,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:00,177 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-01 00:58:00,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-01 00:58:00,177 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-01 00:58:00,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-01 00:58:00,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:00,178 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-10-01 00:58:00,179 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:00,179 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:00,179 INFO L82 PathProgramCache]: Analyzing trace with hash 2089942100, now seen corresponding path program 10 times [2018-10-01 00:58:00,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:00,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:00,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:00,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:00,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:00,470 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:00,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:00,477 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:58:00,487 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:58:00,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:00,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:00,872 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:00,872 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2018-10-01 00:58:00,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-01 00:58:00,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-01 00:58:00,873 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:00,873 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-10-01 00:58:05,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:05,021 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2018-10-01 00:58:05,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-01 00:58:05,022 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-10-01 00:58:05,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:05,023 INFO L225 Difference]: With dead ends: 109 [2018-10-01 00:58:05,023 INFO L226 Difference]: Without dead ends: 83 [2018-10-01 00:58:05,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-10-01 00:58:05,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-01 00:58:05,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2018-10-01 00:58:05,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-01 00:58:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-01 00:58:05,034 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2018-10-01 00:58:05,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:05,034 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-01 00:58:05,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-01 00:58:05,034 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-01 00:58:05,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-01 00:58:05,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:05,035 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-01 00:58:05,036 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:05,036 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:05,036 INFO L82 PathProgramCache]: Analyzing trace with hash 549587323, now seen corresponding path program 11 times [2018-10-01 00:58:05,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:05,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:05,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:05,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:05,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:05,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:05,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:05,201 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:58:05,245 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-01 00:58:05,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:05,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:05,629 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:05,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-10-01 00:58:05,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-01 00:58:05,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-01 00:58:05,630 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:05,630 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 26 states. [2018-10-01 00:58:06,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:06,737 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2018-10-01 00:58:06,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-01 00:58:06,738 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2018-10-01 00:58:06,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:06,739 INFO L225 Difference]: With dead ends: 120 [2018-10-01 00:58:06,739 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:58:06,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 00:58:06,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:58:06,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-10-01 00:58:06,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-01 00:58:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-10-01 00:58:06,749 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2018-10-01 00:58:06,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:06,749 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-10-01 00:58:06,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-01 00:58:06,749 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-10-01 00:58:06,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-01 00:58:06,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:06,750 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-01 00:58:06,751 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:06,751 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:06,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1743111421, now seen corresponding path program 12 times [2018-10-01 00:58:06,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:06,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:06,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:06,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:06,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:07,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:07,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:07,262 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:58:07,285 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:58:07,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:07,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:07,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:07,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 28 [2018-10-01 00:58:07,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-01 00:58:07,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-01 00:58:07,699 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:07,700 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 29 states. [2018-10-01 00:58:13,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:13,219 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2018-10-01 00:58:13,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-01 00:58:13,220 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2018-10-01 00:58:13,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:13,221 INFO L225 Difference]: With dead ends: 124 [2018-10-01 00:58:13,221 INFO L226 Difference]: Without dead ends: 94 [2018-10-01 00:58:13,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-10-01 00:58:13,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-01 00:58:13,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2018-10-01 00:58:13,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-01 00:58:13,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-10-01 00:58:13,232 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2018-10-01 00:58:13,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:13,233 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-10-01 00:58:13,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-01 00:58:13,233 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-10-01 00:58:13,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-01 00:58:13,234 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:13,234 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-01 00:58:13,235 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:13,235 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:13,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1415751510, now seen corresponding path program 13 times [2018-10-01 00:58:13,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:13,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:13,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:13,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:13,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:13,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:13,735 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:13,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:58:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:13,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:14,038 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:14,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-10-01 00:58:14,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-01 00:58:14,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-01 00:58:14,039 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:14,039 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 29 states. [2018-10-01 00:58:15,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:15,555 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-10-01 00:58:15,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-01 00:58:15,555 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2018-10-01 00:58:15,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:15,556 INFO L225 Difference]: With dead ends: 135 [2018-10-01 00:58:15,556 INFO L226 Difference]: Without dead ends: 68 [2018-10-01 00:58:15,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 00:58:15,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-01 00:58:15,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2018-10-01 00:58:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-01 00:58:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-01 00:58:15,567 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-10-01 00:58:15,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:15,568 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-01 00:58:15,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-01 00:58:15,568 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-01 00:58:15,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-01 00:58:15,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:15,569 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-01 00:58:15,569 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:15,569 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:15,570 INFO L82 PathProgramCache]: Analyzing trace with hash 175889954, now seen corresponding path program 14 times [2018-10-01 00:58:15,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:15,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:15,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:15,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:58:15,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 8 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:16,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:16,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:16,659 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:58:16,674 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:58:16,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:16,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 128 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:17,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:17,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 42 [2018-10-01 00:58:17,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-01 00:58:17,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-01 00:58:17,368 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:17,368 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 43 states. [2018-10-01 00:58:25,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:25,274 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-10-01 00:58:25,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-01 00:58:25,275 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 65 [2018-10-01 00:58:25,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:25,276 INFO L225 Difference]: With dead ends: 173 [2018-10-01 00:58:25,276 INFO L226 Difference]: Without dead ends: 102 [2018-10-01 00:58:25,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s Time [2018-10-01 00:58:25,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-01 00:58:25,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2018-10-01 00:58:25,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-01 00:58:25,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-01 00:58:25,288 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 65 [2018-10-01 00:58:25,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:25,289 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-01 00:58:25,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-01 00:58:25,289 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-01 00:58:25,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-01 00:58:25,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:25,290 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-10-01 00:58:25,290 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:25,291 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:25,291 INFO L82 PathProgramCache]: Analyzing trace with hash 2036938705, now seen corresponding path program 15 times [2018-10-01 00:58:25,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:25,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:25,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:25,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:25,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 9 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:25,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:25,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:25,995 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:58:26,016 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-01 00:58:26,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:26,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 162 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:26,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:26,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2018-10-01 00:58:26,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-01 00:58:26,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-01 00:58:26,727 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:26,727 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 47 states. [2018-10-01 00:58:36,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:36,456 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2018-10-01 00:58:36,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-01 00:58:36,457 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2018-10-01 00:58:36,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:36,458 INFO L225 Difference]: With dead ends: 192 [2018-10-01 00:58:36,458 INFO L226 Difference]: Without dead ends: 113 [2018-10-01 00:58:36,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s Time [2018-10-01 00:58:36,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-01 00:58:36,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2018-10-01 00:58:36,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-01 00:58:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-01 00:58:36,468 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 72 [2018-10-01 00:58:36,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:36,468 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-01 00:58:36,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-01 00:58:36,469 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-01 00:58:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-01 00:58:36,470 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:36,470 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-10-01 00:58:36,470 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:36,470 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:36,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1070649840, now seen corresponding path program 16 times [2018-10-01 00:58:36,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:36,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:36,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:36,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:36,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:37,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:37,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:37,046 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:58:37,060 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:58:37,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:37,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:37,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:37,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2018-10-01 00:58:37,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-01 00:58:37,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-01 00:58:37,645 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:37,645 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 38 states. [2018-10-01 00:58:47,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:47,319 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2018-10-01 00:58:47,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-01 00:58:47,319 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 79 [2018-10-01 00:58:47,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:47,320 INFO L225 Difference]: With dead ends: 169 [2018-10-01 00:58:47,320 INFO L226 Difference]: Without dead ends: 127 [2018-10-01 00:58:47,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time [2018-10-01 00:58:47,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-01 00:58:47,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2018-10-01 00:58:47,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-01 00:58:47,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-10-01 00:58:47,335 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2018-10-01 00:58:47,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:47,335 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-10-01 00:58:47,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-01 00:58:47,336 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-10-01 00:58:47,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-01 00:58:47,336 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:47,336 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-01 00:58:47,337 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:47,337 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:47,337 INFO L82 PathProgramCache]: Analyzing trace with hash -685461225, now seen corresponding path program 17 times [2018-10-01 00:58:47,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:47,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:47,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:47,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:47,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:47,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:47,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:47,598 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:58:47,620 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-01 00:58:47,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:47,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:47,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:47,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-10-01 00:58:47,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-01 00:58:47,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-01 00:58:47,933 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:47,933 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 38 states. [2018-10-01 00:58:49,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:49,834 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2018-10-01 00:58:49,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-01 00:58:49,834 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2018-10-01 00:58:49,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:49,835 INFO L225 Difference]: With dead ends: 180 [2018-10-01 00:58:49,836 INFO L226 Difference]: Without dead ends: 89 [2018-10-01 00:58:49,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 00:58:49,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-01 00:58:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2018-10-01 00:58:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-01 00:58:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-10-01 00:58:49,846 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2018-10-01 00:58:49,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:49,847 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-10-01 00:58:49,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-01 00:58:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-10-01 00:58:49,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-01 00:58:49,847 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:49,848 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-01 00:58:49,848 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:49,848 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:49,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1750415713, now seen corresponding path program 18 times [2018-10-01 00:58:49,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:49,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:49,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:49,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:49,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:50,580 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:50,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:50,589 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:58:50,613 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-01 00:58:50,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:50,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:51,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:51,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 40 [2018-10-01 00:58:51,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-01 00:58:51,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-01 00:58:51,429 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:51,429 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 41 states. [2018-10-01 00:59:01,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:01,343 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2018-10-01 00:59:01,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-01 00:59:01,347 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2018-10-01 00:59:01,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:01,348 INFO L225 Difference]: With dead ends: 184 [2018-10-01 00:59:01,348 INFO L226 Difference]: Without dead ends: 138 [2018-10-01 00:59:01,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time [2018-10-01 00:59:01,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-01 00:59:01,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 91. [2018-10-01 00:59:01,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-01 00:59:01,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-01 00:59:01,360 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-10-01 00:59:01,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:01,361 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-01 00:59:01,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-01 00:59:01,361 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-01 00:59:01,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-01 00:59:01,362 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:01,362 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-01 00:59:01,362 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:01,362 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:01,362 INFO L82 PathProgramCache]: Analyzing trace with hash 310818374, now seen corresponding path program 19 times [2018-10-01 00:59:01,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:01,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:01,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:01,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:01,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:01,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:01,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:01,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:59:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:01,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:02,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:02,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-10-01 00:59:02,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-01 00:59:02,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-01 00:59:02,177 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:02,177 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 41 states. [2018-10-01 00:59:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:04,344 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-10-01 00:59:04,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-01 00:59:04,346 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2018-10-01 00:59:04,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:04,347 INFO L225 Difference]: With dead ends: 195 [2018-10-01 00:59:04,347 INFO L226 Difference]: Without dead ends: 96 [2018-10-01 00:59:04,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-10-01 00:59:04,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-01 00:59:04,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2018-10-01 00:59:04,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-01 00:59:04,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-01 00:59:04,358 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 90 [2018-10-01 00:59:04,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:04,359 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-01 00:59:04,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-01 00:59:04,359 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-01 00:59:04,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-01 00:59:04,360 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:04,360 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-01 00:59:04,360 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:04,360 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:04,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2005850046, now seen corresponding path program 20 times [2018-10-01 00:59:04,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:04,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:04,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:04,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:59:04,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 12 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:05,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:05,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:05,055 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:59:05,074 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:59:05,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:05,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 288 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:06,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:06,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 58 [2018-10-01 00:59:06,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-01 00:59:06,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-01 00:59:06,526 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:06,526 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 59 states. [2018-10-01 00:59:21,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:21,049 INFO L93 Difference]: Finished difference Result 249 states and 255 transitions. [2018-10-01 00:59:21,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-01 00:59:21,049 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 93 [2018-10-01 00:59:21,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:21,051 INFO L225 Difference]: With dead ends: 249 [2018-10-01 00:59:21,051 INFO L226 Difference]: Without dead ends: 146 [2018-10-01 00:59:21,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9s Time [2018-10-01 00:59:21,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-01 00:59:21,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2018-10-01 00:59:21,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-01 00:59:21,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-01 00:59:21,085 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 93 [2018-10-01 00:59:21,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:21,085 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-01 00:59:21,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-01 00:59:21,085 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-01 00:59:21,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-01 00:59:21,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:21,086 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-10-01 00:59:21,086 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:21,086 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:21,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1811736429, now seen corresponding path program 21 times [2018-10-01 00:59:21,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:21,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:21,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:21,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:21,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:22,195 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:22,195 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:22,202 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:59:22,227 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-01 00:59:22,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:22,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:23,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:23,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 46 [2018-10-01 00:59:23,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-01 00:59:23,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-01 00:59:23,240 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:23,240 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 47 states. [2018-10-01 00:59:38,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:38,392 INFO L93 Difference]: Finished difference Result 214 states and 219 transitions. [2018-10-01 00:59:38,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-01 00:59:38,392 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2018-10-01 00:59:38,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:38,393 INFO L225 Difference]: With dead ends: 214 [2018-10-01 00:59:38,393 INFO L226 Difference]: Without dead ends: 160 [2018-10-01 00:59:38,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time [2018-10-01 00:59:38,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-01 00:59:38,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2018-10-01 00:59:38,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-01 00:59:38,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-10-01 00:59:38,407 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2018-10-01 00:59:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:38,408 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-10-01 00:59:38,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-01 00:59:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-10-01 00:59:38,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-01 00:59:38,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:38,409 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-01 00:59:38,409 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:38,409 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:38,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1008713748, now seen corresponding path program 22 times [2018-10-01 00:59:38,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:38,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:38,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:38,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:38,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:38,728 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:38,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:38,736 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:59:38,754 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:59:38,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:38,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:39,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:39,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2018-10-01 00:59:39,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-01 00:59:39,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-01 00:59:39,173 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:39,173 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-10-01 00:59:42,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:42,194 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-10-01 00:59:42,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-01 00:59:42,194 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-10-01 00:59:42,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:42,195 INFO L225 Difference]: With dead ends: 225 [2018-10-01 00:59:42,195 INFO L226 Difference]: Without dead ends: 110 [2018-10-01 00:59:42,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-10-01 00:59:42,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-01 00:59:42,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2018-10-01 00:59:42,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-01 00:59:42,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-10-01 00:59:42,213 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 104 [2018-10-01 00:59:42,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:42,213 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-10-01 00:59:42,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-01 00:59:42,214 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-10-01 00:59:42,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-01 00:59:42,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:42,214 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-01 00:59:42,214 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:42,214 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:42,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1699483764, now seen corresponding path program 23 times [2018-10-01 00:59:42,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:42,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:42,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:42,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:42,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:43,118 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:43,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:43,125 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:59:43,154 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-01 00:59:43,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:43,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:44,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:44,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 49 [2018-10-01 00:59:44,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-01 00:59:44,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-01 00:59:44,118 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:44,118 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 50 states. [2018-10-01 00:59:59,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:59,033 INFO L93 Difference]: Finished difference Result 229 states and 234 transitions. [2018-10-01 00:59:59,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-01 00:59:59,041 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2018-10-01 00:59:59,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:59,042 INFO L225 Difference]: With dead ends: 229 [2018-10-01 00:59:59,042 INFO L226 Difference]: Without dead ends: 171 [2018-10-01 00:59:59,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time [2018-10-01 00:59:59,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-01 00:59:59,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 112. [2018-10-01 00:59:59,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-01 00:59:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-01 00:59:59,064 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-10-01 00:59:59,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:59,064 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-01 00:59:59,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-01 00:59:59,064 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-01 00:59:59,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-01 00:59:59,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:59,065 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-01 00:59:59,065 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:59,065 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:59,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1446534989, now seen corresponding path program 24 times [2018-10-01 00:59:59,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:59,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:59,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:59,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:59,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:59,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:59,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:59,406 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:59:59,435 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-01 00:59:59,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:59,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:59,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:59,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2018-10-01 00:59:59,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-01 00:59:59,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-01 00:59:59,839 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:59,839 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 50 states. [2018-10-01 01:00:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:03,763 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2018-10-01 01:00:03,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-01 01:00:03,764 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 111 [2018-10-01 01:00:03,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:03,765 INFO L225 Difference]: With dead ends: 240 [2018-10-01 01:00:03,765 INFO L226 Difference]: Without dead ends: 117 [2018-10-01 01:00:03,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 01:00:03,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-01 01:00:03,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2018-10-01 01:00:03,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-01 01:00:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-01 01:00:03,782 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 111 [2018-10-01 01:00:03,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:03,783 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-01 01:00:03,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-01 01:00:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-01 01:00:03,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-01 01:00:03,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:03,783 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-01 01:00:03,783 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:03,784 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:03,784 INFO L82 PathProgramCache]: Analyzing trace with hash -2055366085, now seen corresponding path program 25 times [2018-10-01 01:00:03,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:03,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:03,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:03,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:03,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:04,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:04,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:00:04,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:00:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:04,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:06,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:06,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 52 [2018-10-01 01:00:06,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-01 01:00:06,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-01 01:00:06,086 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:06,087 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 53 states. [2018-10-01 01:00:22,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:22,844 INFO L93 Difference]: Finished difference Result 244 states and 249 transitions. [2018-10-01 01:00:22,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-01 01:00:22,845 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2018-10-01 01:00:22,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:22,847 INFO L225 Difference]: With dead ends: 244 [2018-10-01 01:00:22,847 INFO L226 Difference]: Without dead ends: 182 [2018-10-01 01:00:22,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time [2018-10-01 01:00:22,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-01 01:00:22,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 119. [2018-10-01 01:00:22,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-01 01:00:22,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-10-01 01:00:22,866 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2018-10-01 01:00:22,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:22,867 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-10-01 01:00:22,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-01 01:00:22,867 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-10-01 01:00:22,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-01 01:00:22,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:22,868 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-01 01:00:22,868 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:22,868 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:22,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1833851874, now seen corresponding path program 26 times [2018-10-01 01:00:22,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:22,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:22,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:22,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:00:22,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:23,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:23,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:00:23,258 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:00:23,284 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:00:23,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:23,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:23,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:23,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-10-01 01:00:23,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-01 01:00:23,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-01 01:00:23,713 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:23,713 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 53 states. [2018-10-01 01:00:27,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:27,221 INFO L93 Difference]: Finished difference Result 255 states and 259 transitions. [2018-10-01 01:00:27,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-01 01:00:27,223 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 118 [2018-10-01 01:00:27,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:27,223 INFO L225 Difference]: With dead ends: 255 [2018-10-01 01:00:27,223 INFO L226 Difference]: Without dead ends: 124 [2018-10-01 01:00:27,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-10-01 01:00:27,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-01 01:00:27,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2018-10-01 01:00:27,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-01 01:00:27,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-10-01 01:00:27,241 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 118 [2018-10-01 01:00:27,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:27,242 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-10-01 01:00:27,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-01 01:00:27,242 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-10-01 01:00:27,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-01 01:00:27,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:27,242 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-01 01:00:27,242 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:27,243 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:27,243 INFO L82 PathProgramCache]: Analyzing trace with hash 540940634, now seen corresponding path program 27 times [2018-10-01 01:00:27,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:27,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:27,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:27,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:27,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 16 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:28,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:28,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:00:28,848 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:00:28,891 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-01 01:00:28,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:28,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 512 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:30,520 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:30,520 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 74 [2018-10-01 01:00:30,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-01 01:00:30,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-01 01:00:30,521 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:30,521 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 75 states. [2018-10-01 01:00:54,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:54,297 INFO L93 Difference]: Finished difference Result 325 states and 331 transitions. [2018-10-01 01:00:54,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-01 01:00:54,298 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 121 [2018-10-01 01:00:54,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:54,299 INFO L225 Difference]: With dead ends: 325 [2018-10-01 01:00:54,300 INFO L226 Difference]: Without dead ends: 190 [2018-10-01 01:00:54,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7s Time [2018-10-01 01:00:54,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-01 01:00:54,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 129. [2018-10-01 01:00:54,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-01 01:00:54,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-10-01 01:00:54,324 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 121 [2018-10-01 01:00:54,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:54,324 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-10-01 01:00:54,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-01 01:00:54,324 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-10-01 01:00:54,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-01 01:00:54,325 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:54,325 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-10-01 01:00:54,325 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:54,325 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:54,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1991581943, now seen corresponding path program 28 times [2018-10-01 01:00:54,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:54,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:54,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:54,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:54,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:55,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:55,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:00:55,477 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:00:55,501 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:00:55,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:55,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:56,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:56,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 58 [2018-10-01 01:00:56,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-01 01:00:56,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-01 01:00:56,827 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:56,827 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-10-01 01:01:21,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:01:21,029 INFO L93 Difference]: Finished difference Result 274 states and 279 transitions. [2018-10-01 01:01:21,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-01 01:01:21,030 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-10-01 01:01:21,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:01:21,031 INFO L225 Difference]: With dead ends: 274 [2018-10-01 01:01:21,031 INFO L226 Difference]: Without dead ends: 204 [2018-10-01 01:01:21,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s Time [2018-10-01 01:01:21,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-01 01:01:21,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2018-10-01 01:01:21,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-01 01:01:21,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-10-01 01:01:21,061 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-10-01 01:01:21,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:01:21,062 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-10-01 01:01:21,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-01 01:01:21,062 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-10-01 01:01:21,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-01 01:01:21,063 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:01:21,063 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-01 01:01:21,063 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:01:21,063 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:01:21,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1942976080, now seen corresponding path program 29 times [2018-10-01 01:01:21,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:01:21,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:01:21,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:21,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:01:21,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:22,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:01:22,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:01:22,072 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:01:22,102 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-01 01:01:22,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:01:22,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:22,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:01:22,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2018-10-01 01:01:22,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-01 01:01:22,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-01 01:01:22,996 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:22,996 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 59 states. [2018-10-01 01:01:27,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:01:27,404 INFO L93 Difference]: Finished difference Result 285 states and 289 transitions. [2018-10-01 01:01:27,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-01 01:01:27,405 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 132 [2018-10-01 01:01:27,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:01:27,406 INFO L225 Difference]: With dead ends: 285 [2018-10-01 01:01:27,406 INFO L226 Difference]: Without dead ends: 138 [2018-10-01 01:01:27,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-10-01 01:01:27,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-01 01:01:27,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2018-10-01 01:01:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-01 01:01:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-01 01:01:27,427 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-10-01 01:01:27,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:01:27,427 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-01 01:01:27,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-01 01:01:27,427 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-01 01:01:27,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-01 01:01:27,428 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:01:27,428 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-01 01:01:27,428 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:01:27,428 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:01:27,428 INFO L82 PathProgramCache]: Analyzing trace with hash 220943656, now seen corresponding path program 30 times [2018-10-01 01:01:27,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:01:27,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:01:27,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:27,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:01:27,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 18 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:28,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:01:28,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:01:28,823 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:01:28,857 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-01 01:01:28,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:01:28,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 648 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:31,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:01:31,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 82 [2018-10-01 01:01:31,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-01 01:01:31,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-01 01:01:31,023 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:31,024 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 83 states. [2018-10-01 01:02:01,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:02:01,175 INFO L93 Difference]: Finished difference Result 363 states and 369 transitions. [2018-10-01 01:02:01,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-10-01 01:02:01,175 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 135 [2018-10-01 01:02:01,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:02:01,177 INFO L225 Difference]: With dead ends: 363 [2018-10-01 01:02:01,177 INFO L226 Difference]: Without dead ends: 212 [2018-10-01 01:02:01,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2s Time [2018-10-01 01:02:01,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-10-01 01:02:01,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 143. [2018-10-01 01:02:01,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-01 01:02:01,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-10-01 01:02:01,206 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 135 [2018-10-01 01:02:01,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:02:01,207 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-10-01 01:02:01,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-01 01:02:01,207 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-10-01 01:02:01,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-01 01:02:01,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:02:01,207 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-10-01 01:02:01,208 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:02:01,208 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:02:01,208 INFO L82 PathProgramCache]: Analyzing trace with hash 847427031, now seen corresponding path program 31 times [2018-10-01 01:02:01,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:02:01,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:02:01,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:01,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:02:01,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:03,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:02:03,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:02:03,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:02:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:03,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:02:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:05,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:02:05,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 64 [2018-10-01 01:02:05,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-01 01:02:05,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-01 01:02:05,067 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:02:05,067 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 65 states. [2018-10-01 01:02:31,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:02:31,181 INFO L93 Difference]: Finished difference Result 304 states and 309 transitions. [2018-10-01 01:02:31,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-01 01:02:31,181 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 142 [2018-10-01 01:02:31,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:02:31,183 INFO L225 Difference]: With dead ends: 304 [2018-10-01 01:02:31,183 INFO L226 Difference]: Without dead ends: 226 [2018-10-01 01:02:31,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6s Time [2018-10-01 01:02:31,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-01 01:02:31,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 147. [2018-10-01 01:02:31,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-01 01:02:31,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2018-10-01 01:02:31,205 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 142 [2018-10-01 01:02:31,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:02:31,205 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2018-10-01 01:02:31,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-01 01:02:31,205 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2018-10-01 01:02:31,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-01 01:02:31,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:02:31,206 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-01 01:02:31,206 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:02:31,206 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:02:31,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1796978306, now seen corresponding path program 32 times [2018-10-01 01:02:31,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:02:31,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:02:31,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:31,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:02:31,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 820 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:32,037 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:02:32,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:02:32,046 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:02:32,079 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:02:32,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:02:32,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:02:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 820 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:32,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:02:32,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-10-01 01:02:32,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-01 01:02:32,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-01 01:02:32,782 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:02:32,782 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 65 states. [2018-10-01 01:02:37,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:02:37,983 INFO L93 Difference]: Finished difference Result 315 states and 319 transitions. [2018-10-01 01:02:37,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-01 01:02:37,983 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 146 [2018-10-01 01:02:37,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:02:37,984 INFO L225 Difference]: With dead ends: 315 [2018-10-01 01:02:37,984 INFO L226 Difference]: Without dead ends: 152 [2018-10-01 01:02:37,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-10-01 01:02:37,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-01 01:02:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2018-10-01 01:02:38,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-01 01:02:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-10-01 01:02:38,017 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 146 [2018-10-01 01:02:38,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:02:38,018 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-10-01 01:02:38,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-01 01:02:38,018 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-10-01 01:02:38,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-01 01:02:38,018 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:02:38,018 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-01 01:02:38,019 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:02:38,019 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:02:38,019 INFO L82 PathProgramCache]: Analyzing trace with hash -193355018, now seen corresponding path program 33 times [2018-10-01 01:02:38,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:02:38,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:02:38,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:38,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:02:38,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 20 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:39,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:02:39,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:02:39,527 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:02:39,584 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-01 01:02:39,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:02:39,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:02:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 800 proven. 671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:41,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:02:41,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46] total 90 [2018-10-01 01:02:41,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-01 01:02:41,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-01 01:02:41,977 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:02:41,978 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 91 states. [2018-10-01 01:03:18,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:03:18,084 INFO L93 Difference]: Finished difference Result 401 states and 407 transitions. [2018-10-01 01:03:18,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-10-01 01:03:18,085 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 149 [2018-10-01 01:03:18,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:03:18,087 INFO L225 Difference]: With dead ends: 401 [2018-10-01 01:03:18,087 INFO L226 Difference]: Without dead ends: 234 [2018-10-01 01:03:18,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4s Time [2018-10-01 01:03:18,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-01 01:03:18,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 157. [2018-10-01 01:03:18,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-01 01:03:18,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-10-01 01:03:18,123 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 149 [2018-10-01 01:03:18,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:03:18,124 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-10-01 01:03:18,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-01 01:03:18,124 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-10-01 01:03:18,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-01 01:03:18,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:03:18,125 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1] [2018-10-01 01:03:18,125 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:03:18,125 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:03:18,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1380130469, now seen corresponding path program 34 times [2018-10-01 01:03:18,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:03:18,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:03:18,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:18,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:03:18,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:03:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 21 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:20,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:03:20,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:03:20,143 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:03:20,169 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:03:20,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:03:20,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:03:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 21 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:22,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:03:22,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 70 [2018-10-01 01:03:22,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-01 01:03:22,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-01 01:03:22,193 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:03:22,193 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 71 states. [2018-10-01 01:03:54,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:03:54,657 INFO L93 Difference]: Finished difference Result 334 states and 339 transitions. [2018-10-01 01:03:54,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-01 01:03:54,657 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 156 [2018-10-01 01:03:54,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:03:54,659 INFO L225 Difference]: With dead ends: 334 [2018-10-01 01:03:54,660 INFO L226 Difference]: Without dead ends: 248 [2018-10-01 01:03:54,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7s Time [2018-10-01 01:03:54,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-10-01 01:03:54,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 161. [2018-10-01 01:03:54,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-01 01:03:54,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-10-01 01:03:54,699 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 156 [2018-10-01 01:03:54,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:03:54,699 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-10-01 01:03:54,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-01 01:03:54,700 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-10-01 01:03:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-01 01:03:54,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:03:54,701 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-01 01:03:54,701 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:03:54,701 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:03:54,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1719166132, now seen corresponding path program 35 times [2018-10-01 01:03:54,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:03:54,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:03:54,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:54,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:03:54,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:03:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 990 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:55,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:03:55,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:03:55,535 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:03:55,580 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-10-01 01:03:55,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:03:55,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:03:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 990 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:57,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:03:57,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2018-10-01 01:03:57,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-01 01:03:57,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-01 01:03:57,271 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:03:57,271 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 71 states. [2018-10-01 01:04:03,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:04:03,572 INFO L93 Difference]: Finished difference Result 345 states and 349 transitions. [2018-10-01 01:04:03,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-01 01:04:03,572 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 160 [2018-10-01 01:04:03,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:04:03,574 INFO L225 Difference]: With dead ends: 345 [2018-10-01 01:04:03,574 INFO L226 Difference]: Without dead ends: 166 [2018-10-01 01:04:03,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time [2018-10-01 01:04:03,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-01 01:04:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2018-10-01 01:04:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-01 01:04:03,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-10-01 01:04:03,608 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 160 [2018-10-01 01:04:03,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:04:03,608 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-10-01 01:04:03,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-01 01:04:03,609 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-10-01 01:04:03,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-01 01:04:03,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:04:03,609 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-01 01:04:03,609 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:04:03,610 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:04:03,610 INFO L82 PathProgramCache]: Analyzing trace with hash -148438332, now seen corresponding path program 36 times [2018-10-01 01:04:03,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:04:03,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:04:03,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:03,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:04:03,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:04:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 22 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:06,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:04:06,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:04:06,172 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:04:06,220 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-01 01:04:06,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:04:06,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:04:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 22 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:08,381 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:04:08,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 73 [2018-10-01 01:04:08,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-01 01:04:08,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-01 01:04:08,382 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:04:08,382 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 74 states. [2018-10-01 01:04:46,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:04:46,412 INFO L93 Difference]: Finished difference Result 349 states and 354 transitions. [2018-10-01 01:04:46,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-01 01:04:46,412 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 163 [2018-10-01 01:04:46,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:04:46,414 INFO L225 Difference]: With dead ends: 349 [2018-10-01 01:04:46,414 INFO L226 Difference]: Without dead ends: 259 [2018-10-01 01:04:46,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7s Time [2018-10-01 01:04:46,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-01 01:04:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 168. [2018-10-01 01:04:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-01 01:04:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2018-10-01 01:04:46,448 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 163 [2018-10-01 01:04:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:04:46,448 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2018-10-01 01:04:46,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-01 01:04:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2018-10-01 01:04:46,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-01 01:04:46,449 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:04:46,449 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-01 01:04:46,449 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:04:46,449 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:04:46,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1550952469, now seen corresponding path program 37 times [2018-10-01 01:04:46,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:04:46,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:04:46,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:46,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:04:46,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:04:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 1081 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:46,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:04:46,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:04:47,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:04:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:04:47,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:04:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 1081 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:47,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:04:47,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2018-10-01 01:04:47,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-01 01:04:47,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-01 01:04:47,787 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:04:47,787 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 74 states. [2018-10-01 01:04:54,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:04:54,684 INFO L93 Difference]: Finished difference Result 360 states and 364 transitions. [2018-10-01 01:04:54,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-01 01:04:54,685 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 167 [2018-10-01 01:04:54,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:04:54,686 INFO L225 Difference]: With dead ends: 360 [2018-10-01 01:04:54,686 INFO L226 Difference]: Without dead ends: 173 [2018-10-01 01:04:54,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-10-01 01:04:54,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-01 01:04:54,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2018-10-01 01:04:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-01 01:04:54,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-10-01 01:04:54,722 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2018-10-01 01:04:54,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:04:54,722 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-10-01 01:04:54,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-01 01:04:54,722 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-10-01 01:04:54,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-01 01:04:54,723 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:04:54,723 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-01 01:04:54,723 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:04:54,723 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:04:54,724 INFO L82 PathProgramCache]: Analyzing trace with hash -810935949, now seen corresponding path program 38 times [2018-10-01 01:04:54,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:04:54,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:04:54,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:54,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:04:54,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:04:56,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 23 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:56,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:04:56,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:04:56,671 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:04:56,703 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:04:56,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:04:56,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:04:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 23 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:58,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:04:58,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 76 [2018-10-01 01:04:58,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-01 01:04:58,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-01 01:04:58,946 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:04:58,946 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 77 states. [2018-10-01 01:05:42,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:05:42,391 INFO L93 Difference]: Finished difference Result 364 states and 369 transitions. [2018-10-01 01:05:42,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-01 01:05:42,392 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 170 [2018-10-01 01:05:42,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:05:42,393 INFO L225 Difference]: With dead ends: 364 [2018-10-01 01:05:42,393 INFO L226 Difference]: Without dead ends: 270 [2018-10-01 01:05:42,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9s Time [2018-10-01 01:05:42,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-10-01 01:05:42,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 175. [2018-10-01 01:05:42,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-01 01:05:42,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-10-01 01:05:42,426 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-10-01 01:05:42,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:05:42,426 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-10-01 01:05:42,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-01 01:05:42,426 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-10-01 01:05:42,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-01 01:05:42,427 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:05:42,427 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-01 01:05:42,428 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:05:42,428 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:05:42,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1036484838, now seen corresponding path program 39 times [2018-10-01 01:05:42,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:05:42,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:05:42,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:05:42,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:05:42,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:05:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:05:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 1176 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:05:43,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:05:43,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:05:43,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:05:43,914 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-01 01:05:43,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:05:43,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:05:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 1176 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:05:44,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:05:44,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-10-01 01:05:44,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-01 01:05:44,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-01 01:05:44,691 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:05:44,691 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 77 states. [2018-10-01 01:05:52,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:05:52,457 INFO L93 Difference]: Finished difference Result 375 states and 379 transitions. [2018-10-01 01:05:52,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-01 01:05:52,457 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 174 [2018-10-01 01:05:52,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:05:52,459 INFO L225 Difference]: With dead ends: 375 [2018-10-01 01:05:52,459 INFO L226 Difference]: Without dead ends: 180 [2018-10-01 01:05:52,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time [2018-10-01 01:05:52,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-01 01:05:52,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2018-10-01 01:05:52,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-01 01:05:52,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-10-01 01:05:52,502 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 174 [2018-10-01 01:05:52,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:05:52,502 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-10-01 01:05:52,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-01 01:05:52,502 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-10-01 01:05:52,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-01 01:05:52,503 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:05:52,503 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-01 01:05:52,503 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:05:52,503 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:05:52,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1003391854, now seen corresponding path program 40 times [2018-10-01 01:05:52,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:05:52,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:05:52,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:05:52,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:05:52,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:05:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:05:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 24 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:05:54,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:05:54,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:05:54,566 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:05:54,596 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:05:54,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:05:54,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:05:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 24 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:05:57,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:05:57,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 79 [2018-10-01 01:05:57,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-01 01:05:57,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-01 01:05:57,135 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:05:57,135 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 80 states. [2018-10-01 01:06:44,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:06:44,514 INFO L93 Difference]: Finished difference Result 379 states and 384 transitions. [2018-10-01 01:06:44,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-01 01:06:44,514 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 177 [2018-10-01 01:06:44,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:06:44,515 INFO L225 Difference]: With dead ends: 379 [2018-10-01 01:06:44,516 INFO L226 Difference]: Without dead ends: 281 [2018-10-01 01:06:44,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7s Time [2018-10-01 01:06:44,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-10-01 01:06:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 182. [2018-10-01 01:06:44,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-01 01:06:44,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-10-01 01:06:44,555 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 177 [2018-10-01 01:06:44,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:06:44,555 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-10-01 01:06:44,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-01 01:06:44,555 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-10-01 01:06:44,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-01 01:06:44,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:06:44,556 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-01 01:06:44,556 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:06:44,556 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:06:44,556 INFO L82 PathProgramCache]: Analyzing trace with hash 525284025, now seen corresponding path program 41 times [2018-10-01 01:06:44,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:06:44,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:06:44,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:44,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:06:44,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:06:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 1275 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:45,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:06:45,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:06:45,297 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:06:45,343 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-01 01:06:45,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:06:45,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:06:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 1275 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:46,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:06:46,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2018-10-01 01:06:46,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-01 01:06:46,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-01 01:06:46,068 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:06:46,068 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 80 states. [2018-10-01 01:06:53,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:06:53,977 INFO L93 Difference]: Finished difference Result 390 states and 394 transitions. [2018-10-01 01:06:53,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-01 01:06:53,977 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 181 [2018-10-01 01:06:53,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:06:53,978 INFO L225 Difference]: With dead ends: 390 [2018-10-01 01:06:53,978 INFO L226 Difference]: Without dead ends: 187 [2018-10-01 01:06:53,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-10-01 01:06:53,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-01 01:06:54,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2018-10-01 01:06:54,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-01 01:06:54,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-10-01 01:06:54,029 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 181 [2018-10-01 01:06:54,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:06:54,029 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-10-01 01:06:54,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-01 01:06:54,029 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-10-01 01:06:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-01 01:06:54,030 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:06:54,030 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-01 01:06:54,030 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:06:54,030 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:06:54,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1479170495, now seen corresponding path program 42 times [2018-10-01 01:06:54,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:06:54,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:06:54,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:54,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:06:54,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:06:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 25 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:56,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:06:56,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:06:56,805 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:06:56,857 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-01 01:06:56,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:06:56,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:06:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 25 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:59,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:06:59,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 82 [2018-10-01 01:06:59,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-01 01:06:59,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-01 01:06:59,695 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:06:59,695 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 83 states. [2018-10-01 01:07:50,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:07:50,957 INFO L93 Difference]: Finished difference Result 394 states and 399 transitions. [2018-10-01 01:07:50,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-01 01:07:50,957 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 184 [2018-10-01 01:07:50,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:07:50,959 INFO L225 Difference]: With dead ends: 394 [2018-10-01 01:07:50,959 INFO L226 Difference]: Without dead ends: 292 [2018-10-01 01:07:50,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3s Time [2018-10-01 01:07:50,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-10-01 01:07:50,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 189. [2018-10-01 01:07:50,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-01 01:07:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2018-10-01 01:07:50,996 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 184 [2018-10-01 01:07:50,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:07:50,996 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2018-10-01 01:07:50,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-01 01:07:50,997 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2018-10-01 01:07:50,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-01 01:07:50,997 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:07:50,997 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1] [2018-10-01 01:07:50,998 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:07:50,998 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:07:50,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1293219048, now seen corresponding path program 43 times [2018-10-01 01:07:50,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:07:50,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:07:50,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:07:50,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:07:50,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:07:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:07:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 1378 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:07:51,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:07:51,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:07:51,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:07:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:07:51,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:07:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 1378 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:07:52,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:07:52,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2018-10-01 01:07:52,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-01 01:07:52,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-01 01:07:52,347 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:07:52,348 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 83 states. [2018-10-01 01:08:01,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:01,259 INFO L93 Difference]: Finished difference Result 405 states and 409 transitions. [2018-10-01 01:08:01,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-01 01:08:01,259 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 188 [2018-10-01 01:08:01,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:01,260 INFO L225 Difference]: With dead ends: 405 [2018-10-01 01:08:01,260 INFO L226 Difference]: Without dead ends: 194 [2018-10-01 01:08:01,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-10-01 01:08:01,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-01 01:08:01,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2018-10-01 01:08:01,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-01 01:08:01,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2018-10-01 01:08:01,298 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 188 [2018-10-01 01:08:01,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:01,298 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2018-10-01 01:08:01,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-01 01:08:01,299 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2018-10-01 01:08:01,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-01 01:08:01,299 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:01,300 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1] [2018-10-01 01:08:01,300 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:01,300 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:01,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1734936480, now seen corresponding path program 44 times [2018-10-01 01:08:01,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:01,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:01,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:01,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:01,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2458 backedges. 26 proven. 2432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:03,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:03,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:03,813 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:08:03,854 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:08:03,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:03,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2458 backedges. 1352 proven. 1106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:07,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:07,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 58] total 114 [2018-10-01 01:08:07,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-10-01 01:08:07,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-10-01 01:08:07,589 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:07,589 INFO L87 Difference]: Start difference. First operand 192 states and 194 transitions. Second operand 115 states. [2018-10-01 01:09:11,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:11,671 INFO L93 Difference]: Finished difference Result 515 states and 521 transitions. [2018-10-01 01:09:11,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2018-10-01 01:09:11,671 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 191 [2018-10-01 01:09:11,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:11,673 INFO L225 Difference]: With dead ends: 515 [2018-10-01 01:09:11,673 INFO L226 Difference]: Without dead ends: 300 [2018-10-01 01:09:11,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.9s Time [2018-10-01 01:09:11,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2018-10-01 01:09:11,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 199. [2018-10-01 01:09:11,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-01 01:09:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-10-01 01:09:11,717 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 191 [2018-10-01 01:09:11,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:11,717 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-10-01 01:09:11,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-10-01 01:09:11,718 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-10-01 01:09:11,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-01 01:09:11,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:11,719 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1] [2018-10-01 01:09:11,719 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:11,719 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:11,719 INFO L82 PathProgramCache]: Analyzing trace with hash -303839985, now seen corresponding path program 45 times [2018-10-01 01:09:11,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:11,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:11,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:11,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:11,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2647 backedges. 27 proven. 2620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:14,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:14,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:14,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:09:14,118 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-10-01 01:09:14,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:14,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2647 backedges. 27 proven. 2620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:17,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:17,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58] total 88 [2018-10-01 01:09:17,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-01 01:09:17,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-01 01:09:17,084 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:17,084 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 89 states. [2018-10-01 01:10:12,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:12,746 INFO L93 Difference]: Finished difference Result 424 states and 429 transitions. [2018-10-01 01:10:12,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-10-01 01:10:12,747 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 198 [2018-10-01 01:10:12,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:12,748 INFO L225 Difference]: With dead ends: 424 [2018-10-01 01:10:12,748 INFO L226 Difference]: Without dead ends: 314 [2018-10-01 01:10:12,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9s Time [2018-10-01 01:10:12,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-10-01 01:10:12,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 203. [2018-10-01 01:10:12,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-01 01:10:12,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-10-01 01:10:12,803 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 198 [2018-10-01 01:10:12,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:12,803 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-10-01 01:10:12,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-01 01:10:12,804 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-10-01 01:10:12,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-01 01:10:12,804 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:12,804 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1] [2018-10-01 01:10:12,805 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:12,805 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:12,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1908736842, now seen corresponding path program 46 times [2018-10-01 01:10:12,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:12,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:12,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:12,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:12,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:13,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 1596 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:13,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:13,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:13,380 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:10:13,414 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:10:13,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:13,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 1596 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:14,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:14,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2018-10-01 01:10:14,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-01 01:10:14,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-01 01:10:14,366 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:14,366 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 89 states. [2018-10-01 01:10:23,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:23,995 INFO L93 Difference]: Finished difference Result 435 states and 439 transitions. [2018-10-01 01:10:23,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-01 01:10:23,995 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 202 [2018-10-01 01:10:23,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:23,996 INFO L225 Difference]: With dead ends: 435 [2018-10-01 01:10:23,996 INFO L226 Difference]: Without dead ends: 208 [2018-10-01 01:10:23,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-10-01 01:10:23,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-10-01 01:10:24,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2018-10-01 01:10:24,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-10-01 01:10:24,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 208 transitions. [2018-10-01 01:10:24,048 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 208 transitions. Word has length 202 [2018-10-01 01:10:24,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:24,049 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 208 transitions. [2018-10-01 01:10:24,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-01 01:10:24,049 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 208 transitions. [2018-10-01 01:10:24,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-10-01 01:10:24,049 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:24,050 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1] [2018-10-01 01:10:24,050 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:24,050 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:24,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1062571566, now seen corresponding path program 47 times [2018-10-01 01:10:24,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:24,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:24,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:24,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:24,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2843 backedges. 28 proven. 2815 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:26,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:26,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:26,553 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:10:26,606 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-01 01:10:26,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:26,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2843 backedges. 28 proven. 2815 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:29,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:29,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60] total 91 [2018-10-01 01:10:29,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-01 01:10:29,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-01 01:10:29,782 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:29,782 INFO L87 Difference]: Start difference. First operand 206 states and 208 transitions. Second operand 92 states. Received shutdown request... [2018-10-01 01:10:40,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-01 01:10:40,037 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 01:10:40,042 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 01:10:40,042 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 01:10:40 BoogieIcfgContainer [2018-10-01 01:10:40,042 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 01:10:40,043 INFO L168 Benchmark]: Toolchain (without parser) took 782377.10 ms. Allocated memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: -485.0 MB). Free memory was 1.5 GB in the beginning and 888.0 MB in the end (delta: 570.3 MB). Peak memory consumption was 85.3 MB. Max. memory is 7.1 GB. [2018-10-01 01:10:40,045 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 01:10:40,045 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.32 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 01:10:40,046 INFO L168 Benchmark]: Boogie Preprocessor took 26.74 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 01:10:40,046 INFO L168 Benchmark]: RCFGBuilder took 336.24 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-01 01:10:40,047 INFO L168 Benchmark]: TraceAbstraction took 781966.40 ms. Allocated memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: -485.0 MB). Free memory was 1.4 GB in the beginning and 888.0 MB in the end (delta: 549.1 MB). Peak memory consumption was 64.2 MB. Max. memory is 7.1 GB. [2018-10-01 01:10:40,050 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 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.32 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.74 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 336.24 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 781966.40 ms. Allocated memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: -485.0 MB). Free memory was 1.4 GB in the beginning and 888.0 MB in the end (delta: 549.1 MB). Peak memory consumption was 64.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 34]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 34). Cancelled while BasicCegarLoop was constructing difference of abstraction (206states) and FLOYD_HOARE automaton (currently 18 states, 92 states before enhancement), while ReachableStatesComputation was computing reachable states (46 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 781.9s OverallTime, 51 OverallIterations, 29 TraceHistogramMax, 681.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 948 SDtfs, 4677 SDslu, 28485 SDs, 0 SdLazy, 144909 SolverSat, 1834 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 157.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8342 GetRequests, 4270 SyntacticMatches, 20 SemanticMatches, 4052 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 229.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=206occurred in iteration=50, 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: 1.0s AutomataMinimizationTime, 50 MinimizatonAttempts, 1591 StatesRemovedByMinimization, 50 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 94.4s InterpolantComputationTime, 10406 NumberOfCodeBlocks, 10275 NumberOfCodeBlocksAsserted, 468 NumberOfCheckSat, 10307 ConstructedInterpolants, 0 QuantifiedInterpolants, 10898988 SizeOfPredicates, 153 NumberOfNonLiveVariables, 7494 ConjunctsInSsa, 2246 ConjunctsInUnsatCore, 99 InterpolantComputations, 3 PerfectInterpolantSequences, 27221/95710 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/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_01-10-40-061.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_01-10-40-061.csv Completed graceful shutdown