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-d19836b [2018-09-26 21:54:44,849 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:54:44,852 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:54:44,864 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-09-26 21:54:44,912 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 [2018-09-26 21:54:44,937 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:54:44,938 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:54:44,938 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:54:44,939 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:54:44,939 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:54:44,942 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:54:44,942 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:54:44,942 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:54:44,943 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:54:44,943 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:54:44,943 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:54:44,943 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:54:44,944 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:54:44,944 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:54:44,944 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:54:44,944 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:54:44,945 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:54:44,945 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:54:44,945 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:54:44,945 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:54:44,945 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:54:44,946 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:54:44,946 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:54:44,946 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:54:44,946 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:54:44,947 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:54:44,948 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:54:44,948 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:54:44,948 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:54:44,948 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:54:44,949 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-26 21:54:45,018 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:54:45,032 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:54:45,038 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:54:45,040 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:54:45,040 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:54:45,041 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl [2018-09-26 21:54:45,041 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl' [2018-09-26 21:54:45,101 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:54:45,104 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:54:45,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:54:45,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:54:45,106 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:54:45,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:45" (1/1) ... [2018-09-26 21:54:45,142 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:45" (1/1) ... [2018-09-26 21:54:45,149 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:54:45,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:54:45,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:54:45,151 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:54:45,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:45" (1/1) ... [2018-09-26 21:54:45,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:45" (1/1) ... [2018-09-26 21:54:45,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:45" (1/1) ... [2018-09-26 21:54:45,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:45" (1/1) ... [2018-09-26 21:54:45,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:45" (1/1) ... [2018-09-26 21:54:45,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:45" (1/1) ... [2018-09-26 21:54:45,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:45" (1/1) ... [2018-09-26 21:54:45,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:54:45,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:54:45,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:54:45,175 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:54:45,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:54:45,246 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-26 21:54:45,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:54:45,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:54:45,521 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:54:45,522 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:54:45 BoogieIcfgContainer [2018-09-26 21:54:45,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:54:45,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:54:45,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:54:45,526 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:54:45,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:54:45" (1/2) ... [2018-09-26 21:54:45,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db96042 and model type ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:54:45, skipping insertion in model container [2018-09-26 21:54:45,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:54:45" (2/2) ... [2018-09-26 21:54:45,530 INFO L112 eAbstractionObserver]: Analyzing ICFG ArrayInit02.bpl [2018-09-26 21:54:45,543 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:54:45,551 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:54:45,602 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:54:45,603 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:54:45,603 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:54:45,603 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:54:45,604 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:54:45,604 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:54:45,604 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:54:45,604 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:54:45,604 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:54:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-09-26 21:54:45,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:54:45,627 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:45,628 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-26 21:54:45,629 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:45,637 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:45,637 INFO L82 PathProgramCache]: Analyzing trace with hash 900035954, now seen corresponding path program 1 times [2018-09-26 21:54:45,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:45,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:45,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:45,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:45,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:46,010 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:54:46,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:54:46,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:54:46,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:54:46,027 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:46,029 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2018-09-26 21:54:46,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:46,314 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2018-09-26 21:54:46,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:54:46,316 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-26 21:54:46,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:46,327 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:54:46,328 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:54:46,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:46,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:54:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2018-09-26 21:54:46,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:54:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2018-09-26 21:54:46,367 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2018-09-26 21:54:46,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:46,368 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2018-09-26 21:54:46,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:54:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2018-09-26 21:54:46,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:54:46,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:46,369 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:54:46,369 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:46,370 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:46,370 INFO L82 PathProgramCache]: Analyzing trace with hash 429804648, now seen corresponding path program 1 times [2018-09-26 21:54:46,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:46,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:46,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:46,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:46,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:46,536 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:54:46,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-26 21:54:46,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:54:46,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:54:46,541 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:46,541 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 4 states. [2018-09-26 21:54:46,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:46,880 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-09-26 21:54:46,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:54:46,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-09-26 21:54:46,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:46,882 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:54:46,882 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:54:46,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:46,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:54:46,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-09-26 21:54:46,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:54:46,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2018-09-26 21:54:46,889 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 9 [2018-09-26 21:54:46,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:46,890 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2018-09-26 21:54:46,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:54:46,890 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2018-09-26 21:54:46,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:54:46,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:46,891 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:54:46,891 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:46,891 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:46,892 INFO L82 PathProgramCache]: Analyzing trace with hash 429806570, now seen corresponding path program 1 times [2018-09-26 21:54:46,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:46,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:46,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:46,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:46,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-26 21:54:46,971 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:54:46,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:54:46,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:54:46,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:54:46,972 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:46,972 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 3 states. [2018-09-26 21:54:47,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:47,064 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2018-09-26 21:54:47,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:54:47,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-09-26 21:54:47,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:47,065 INFO L225 Difference]: With dead ends: 24 [2018-09-26 21:54:47,065 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:54:47,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:47,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:54:47,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2018-09-26 21:54:47,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:54:47,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-09-26 21:54:47,069 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-09-26 21:54:47,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:47,069 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-09-26 21:54:47,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:54:47,070 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-09-26 21:54:47,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:54:47,070 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:47,070 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:54:47,071 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:47,071 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:47,071 INFO L82 PathProgramCache]: Analyzing trace with hash -2090155286, now seen corresponding path program 1 times [2018-09-26 21:54:47,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:47,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:47,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:47,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:47,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:47,210 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:47,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:47,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:47,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:47,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:47,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-09-26 21:54:47,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:54:47,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:54:47,479 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:47,479 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2018-09-26 21:54:47,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:47,949 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2018-09-26 21:54:47,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:54:47,950 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2018-09-26 21:54:47,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:47,951 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:54:47,951 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:54:47,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:47,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:54:47,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-09-26 21:54:47,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:54:47,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-26 21:54:47,954 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2018-09-26 21:54:47,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:47,955 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-26 21:54:47,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:54:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-26 21:54:47,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:54:47,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:47,956 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:54:47,956 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:47,956 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:47,957 INFO L82 PathProgramCache]: Analyzing trace with hash -368470767, now seen corresponding path program 1 times [2018-09-26 21:54:47,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:47,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:47,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:47,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:47,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:48,057 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:48,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:48,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:48,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:48,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:48,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-09-26 21:54:48,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:54:48,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:54:48,186 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:48,186 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2018-09-26 21:54:49,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:49,335 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-09-26 21:54:49,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:54:49,336 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:54:49,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:49,337 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:54:49,337 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:54:49,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:49,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:54:49,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-09-26 21:54:49,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:54:49,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-09-26 21:54:49,343 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2018-09-26 21:54:49,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:49,343 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-09-26 21:54:49,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:54:49,343 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-09-26 21:54:49,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:54:49,344 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:49,344 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:54:49,344 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:49,344 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:49,344 INFO L82 PathProgramCache]: Analyzing trace with hash -256855911, now seen corresponding path program 2 times [2018-09-26 21:54:49,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:49,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:49,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:49,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:54:49,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:49,555 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:49,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:49,564 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:54:49,575 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:54:49,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:49,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:49,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:49,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-09-26 21:54:49,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:54:49,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:54:49,916 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:49,916 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 15 states. [2018-09-26 21:54:52,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:52,109 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2018-09-26 21:54:52,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:54:52,109 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2018-09-26 21:54:52,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:52,111 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:54:52,111 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:54:52,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:52,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:54:52,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-09-26 21:54:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:54:52,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-09-26 21:54:52,118 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2018-09-26 21:54:52,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:52,118 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-09-26 21:54:52,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:54:52,118 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-09-26 21:54:52,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-26 21:54:52,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:52,119 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-26 21:54:52,119 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:52,120 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:52,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1324912968, now seen corresponding path program 3 times [2018-09-26 21:54:52,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:52,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:52,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:52,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:52,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:52,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:52,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:52,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:54:52,298 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:54:52,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:52,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:52,506 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:52,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-09-26 21:54:52,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:54:52,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:54:52,508 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:52,508 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 14 states. [2018-09-26 21:54:53,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:53,601 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-09-26 21:54:53,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:54:53,608 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2018-09-26 21:54:53,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:53,608 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:54:53,609 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:54:53,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:53,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:54:53,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-26 21:54:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:54:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-09-26 21:54:53,615 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-09-26 21:54:53,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:53,615 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-09-26 21:54:53,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:54:53,615 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-09-26 21:54:53,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-26 21:54:53,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:53,616 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:54:53,616 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:53,617 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:53,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1588570591, now seen corresponding path program 4 times [2018-09-26 21:54:53,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:53,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:53,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:53,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:53,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:53,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:53,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:53,732 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:54:53,739 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:54:53,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:53,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:53,986 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:53,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-09-26 21:54:53,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:54:53,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:54:53,987 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:53,987 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-09-26 21:54:54,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:54,813 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2018-09-26 21:54:54,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:54:54,814 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-09-26 21:54:54,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:54,815 INFO L225 Difference]: With dead ends: 60 [2018-09-26 21:54:54,815 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:54:54,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:54,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:54:54,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2018-09-26 21:54:54,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:54:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-26 21:54:54,822 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-09-26 21:54:54,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:54,822 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-26 21:54:54,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:54:54,823 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-26 21:54:54,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:54:54,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:54,824 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:54:54,824 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:54,824 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:54,824 INFO L82 PathProgramCache]: Analyzing trace with hash 366737255, now seen corresponding path program 5 times [2018-09-26 21:54:54,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:54,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:54,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:54,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:54,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:55,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:55,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:55,081 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:54:55,093 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-26 21:54:55,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:55,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:55,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:55,832 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-09-26 21:54:55,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:54:55,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:54:55,833 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:55,833 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 17 states. [2018-09-26 21:54:59,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:54:59,328 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2018-09-26 21:54:59,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:54:59,328 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-09-26 21:54:59,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:54:59,330 INFO L225 Difference]: With dead ends: 64 [2018-09-26 21:54:59,330 INFO L226 Difference]: Without dead ends: 50 [2018-09-26 21:54:59,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:54:59,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-26 21:54:59,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2018-09-26 21:54:59,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:54:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-09-26 21:54:59,337 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2018-09-26 21:54:59,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:54:59,337 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-09-26 21:54:59,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:54:59,337 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-09-26 21:54:59,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:54:59,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:54:59,338 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2018-09-26 21:54:59,339 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:54:59,339 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:54:59,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1079885042, now seen corresponding path program 6 times [2018-09-26 21:54:59,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:54:59,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:54:59,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:59,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:54:59,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:54:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:54:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:59,471 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:54:59,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:54:59,485 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:54:59,507 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-26 21:54:59,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:54:59,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:54:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:54:59,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:54:59,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-09-26 21:54:59,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:54:59,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:54:59,896 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:54:59,896 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 17 states. [2018-09-26 21:55:00,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:00,503 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-09-26 21:55:00,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:55:00,503 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2018-09-26 21:55:00,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:00,504 INFO L225 Difference]: With dead ends: 75 [2018-09-26 21:55:00,505 INFO L226 Difference]: Without dead ends: 40 [2018-09-26 21:55:00,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:00,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-26 21:55:00,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2018-09-26 21:55:00,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-26 21:55:00,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-09-26 21:55:00,511 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2018-09-26 21:55:00,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:00,512 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-09-26 21:55:00,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:55:00,512 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-09-26 21:55:00,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-26 21:55:00,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:00,513 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-09-26 21:55:00,513 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:00,513 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:00,513 INFO L82 PathProgramCache]: Analyzing trace with hash -921359226, now seen corresponding path program 7 times [2018-09-26 21:55:00,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:00,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:00,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:00,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:00,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:00,754 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:00,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:00,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:55:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:00,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:01,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:01,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2018-09-26 21:55:01,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:55:01,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:55:01,263 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:01,263 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2018-09-26 21:55:03,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:03,846 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2018-09-26 21:55:03,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:55:03,847 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2018-09-26 21:55:03,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:03,848 INFO L225 Difference]: With dead ends: 79 [2018-09-26 21:55:03,848 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:55:03,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:03,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:55:03,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2018-09-26 21:55:03,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-26 21:55:03,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-09-26 21:55:03,856 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2018-09-26 21:55:03,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:03,856 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-09-26 21:55:03,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:55:03,857 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-09-26 21:55:03,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-26 21:55:03,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:03,858 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2018-09-26 21:55:03,858 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:03,858 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:03,858 INFO L82 PathProgramCache]: Analyzing trace with hash 451793069, now seen corresponding path program 8 times [2018-09-26 21:55:03,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:03,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:03,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:03,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:55:03,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:04,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:04,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:04,244 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:55:04,255 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:55:04,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:04,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:04,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:04,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-09-26 21:55:04,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:55:04,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:55:04,429 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:04,429 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2018-09-26 21:55:05,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:05,120 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2018-09-26 21:55:05,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:55:05,120 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2018-09-26 21:55:05,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:05,121 INFO L225 Difference]: With dead ends: 90 [2018-09-26 21:55:05,121 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:55:05,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:05,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:55:05,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-09-26 21:55:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:55:05,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-09-26 21:55:05,129 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2018-09-26 21:55:05,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:05,130 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-09-26 21:55:05,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:55:05,130 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-09-26 21:55:05,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:55:05,131 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:05,131 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-09-26 21:55:05,131 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:05,131 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:05,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1868574667, now seen corresponding path program 9 times [2018-09-26 21:55:05,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:05,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:05,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:05,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:05,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 5 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:05,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:05,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:05,435 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:55:05,479 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:55:05,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:05,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 50 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:06,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:06,121 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2018-09-26 21:55:06,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:55:06,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:55:06,122 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:06,122 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 31 states. [2018-09-26 21:55:14,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:14,714 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-09-26 21:55:14,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:55:14,715 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2018-09-26 21:55:14,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:14,716 INFO L225 Difference]: With dead ends: 116 [2018-09-26 21:55:14,716 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:55:14,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:14,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:55:14,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2018-09-26 21:55:14,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-26 21:55:14,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-09-26 21:55:14,725 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 44 [2018-09-26 21:55:14,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:14,725 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-09-26 21:55:14,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:55:14,725 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-09-26 21:55:14,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-26 21:55:14,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:14,726 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-09-26 21:55:14,727 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:14,727 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:14,727 INFO L82 PathProgramCache]: Analyzing trace with hash 2089942100, now seen corresponding path program 10 times [2018-09-26 21:55:14,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:14,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:14,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:14,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:14,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:15,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:15,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:15,300 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:55:15,310 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:55:15,310 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:15,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:16,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:16,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2018-09-26 21:55:16,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:55:16,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:55:16,375 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:16,375 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-09-26 21:55:21,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:21,114 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2018-09-26 21:55:21,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:55:21,115 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-09-26 21:55:21,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:21,115 INFO L225 Difference]: With dead ends: 109 [2018-09-26 21:55:21,115 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:55:21,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:21,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:55:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2018-09-26 21:55:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-26 21:55:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-26 21:55:21,127 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2018-09-26 21:55:21,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:21,128 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-26 21:55:21,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:55:21,128 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-26 21:55:21,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-26 21:55:21,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:21,129 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2018-09-26 21:55:21,129 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:21,129 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:21,129 INFO L82 PathProgramCache]: Analyzing trace with hash 549587323, now seen corresponding path program 11 times [2018-09-26 21:55:21,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:21,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:21,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:21,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:21,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:21,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:21,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:21,378 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:55:21,431 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:55:21,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:21,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:21,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:21,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-09-26 21:55:21,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:55:21,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:55:21,814 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:21,814 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 26 states. [2018-09-26 21:55:22,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:22,827 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2018-09-26 21:55:22,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:55:22,829 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2018-09-26 21:55:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:22,829 INFO L225 Difference]: With dead ends: 120 [2018-09-26 21:55:22,830 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:55:22,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:55:22,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-09-26 21:55:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:55:22,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-09-26 21:55:22,846 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2018-09-26 21:55:22,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:22,846 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-09-26 21:55:22,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:55:22,846 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-09-26 21:55:22,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:55:22,847 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:22,847 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-09-26 21:55:22,848 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:22,848 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:22,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1743111421, now seen corresponding path program 12 times [2018-09-26 21:55:22,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:22,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:22,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:22,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:22,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:23,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:23,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:23,359 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:55:23,392 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:55:23,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:23,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:23,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:23,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 28 [2018-09-26 21:55:23,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:55:23,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:55:23,966 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:23,967 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 29 states. [2018-09-26 21:55:30,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:30,049 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2018-09-26 21:55:30,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:55:30,050 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2018-09-26 21:55:30,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:30,050 INFO L225 Difference]: With dead ends: 124 [2018-09-26 21:55:30,050 INFO L226 Difference]: Without dead ends: 94 [2018-09-26 21:55:30,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:30,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-26 21:55:30,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2018-09-26 21:55:30,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-26 21:55:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-09-26 21:55:30,061 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2018-09-26 21:55:30,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:30,062 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-09-26 21:55:30,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:55:30,062 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-09-26 21:55:30,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:55:30,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:30,063 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2018-09-26 21:55:30,063 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:30,063 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:30,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1415751510, now seen corresponding path program 13 times [2018-09-26 21:55:30,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:30,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:30,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:30,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:30,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:30,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:30,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:30,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:55:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:30,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:30,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:30,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-09-26 21:55:30,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:55:30,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:55:30,910 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:30,910 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 29 states. [2018-09-26 21:55:32,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:32,495 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-09-26 21:55:32,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:55:32,496 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2018-09-26 21:55:32,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:32,496 INFO L225 Difference]: With dead ends: 135 [2018-09-26 21:55:32,497 INFO L226 Difference]: Without dead ends: 68 [2018-09-26 21:55:32,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:32,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-26 21:55:32,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2018-09-26 21:55:32,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-26 21:55:32,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-09-26 21:55:32,506 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-09-26 21:55:32,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:32,507 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-09-26 21:55:32,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:55:32,507 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-09-26 21:55:32,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-26 21:55:32,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:32,508 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-09-26 21:55:32,508 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:32,508 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:32,508 INFO L82 PathProgramCache]: Analyzing trace with hash 175889954, now seen corresponding path program 14 times [2018-09-26 21:55:32,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:32,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:32,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:32,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:55:32,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 8 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:33,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:33,047 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:33,054 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:55:33,068 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:55:33,069 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:33,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 128 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:34,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:34,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 42 [2018-09-26 21:55:34,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:55:34,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:55:34,272 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:34,272 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 43 states. [2018-09-26 21:55:48,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:55:48,783 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-09-26 21:55:48,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:55:48,783 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 65 [2018-09-26 21:55:48,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:55:48,784 INFO L225 Difference]: With dead ends: 173 [2018-09-26 21:55:48,784 INFO L226 Difference]: Without dead ends: 102 [2018-09-26 21:55:48,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:55:48,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-26 21:55:48,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2018-09-26 21:55:48,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:55:48,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-09-26 21:55:48,798 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 65 [2018-09-26 21:55:48,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:55:48,799 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-09-26 21:55:48,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:55:48,799 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-09-26 21:55:48,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:55:48,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:55:48,800 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-09-26 21:55:48,800 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:55:48,800 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:55:48,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2036938705, now seen corresponding path program 15 times [2018-09-26 21:55:48,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:55:48,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:55:48,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:48,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:55:48,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:55:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:55:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 9 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:49,633 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:55:49,633 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:55:49,642 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:55:49,659 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-26 21:55:49,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:55:49,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:55:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 162 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:55:50,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:55:50,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2018-09-26 21:55:50,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:55:50,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:55:50,819 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:55:50,819 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 47 states. [2018-09-26 21:56:08,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:08,329 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2018-09-26 21:56:08,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:56:08,329 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2018-09-26 21:56:08,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:08,331 INFO L225 Difference]: With dead ends: 192 [2018-09-26 21:56:08,331 INFO L226 Difference]: Without dead ends: 113 [2018-09-26 21:56:08,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:08,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-26 21:56:08,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2018-09-26 21:56:08,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-26 21:56:08,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-09-26 21:56:08,343 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 72 [2018-09-26 21:56:08,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:08,343 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-09-26 21:56:08,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:56:08,343 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-09-26 21:56:08,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-26 21:56:08,344 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:08,344 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-09-26 21:56:08,344 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:08,345 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:08,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1070649840, now seen corresponding path program 16 times [2018-09-26 21:56:08,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:08,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:08,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:08,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:08,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:09,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:09,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:09,037 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:09,050 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:09,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:09,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:10,035 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:10,035 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2018-09-26 21:56:10,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:56:10,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:56:10,036 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:10,036 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 38 states. [2018-09-26 21:56:21,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:21,248 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2018-09-26 21:56:21,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:56:21,248 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 79 [2018-09-26 21:56:21,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:21,249 INFO L225 Difference]: With dead ends: 169 [2018-09-26 21:56:21,250 INFO L226 Difference]: Without dead ends: 127 [2018-09-26 21:56:21,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:21,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-26 21:56:21,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2018-09-26 21:56:21,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-26 21:56:21,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-09-26 21:56:21,260 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2018-09-26 21:56:21,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:21,260 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-09-26 21:56:21,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:56:21,260 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-09-26 21:56:21,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-26 21:56:21,261 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:21,261 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2018-09-26 21:56:21,261 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:21,261 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:21,261 INFO L82 PathProgramCache]: Analyzing trace with hash -685461225, now seen corresponding path program 17 times [2018-09-26 21:56:21,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:21,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:21,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:21,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:21,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:22,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:22,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:22,158 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:22,180 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-26 21:56:22,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:22,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:22,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:22,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-09-26 21:56:22,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:56:22,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:56:22,651 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:22,651 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 38 states. [2018-09-26 21:56:24,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:24,935 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2018-09-26 21:56:24,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:56:24,936 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2018-09-26 21:56:24,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:24,936 INFO L225 Difference]: With dead ends: 180 [2018-09-26 21:56:24,936 INFO L226 Difference]: Without dead ends: 89 [2018-09-26 21:56:24,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:24,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-26 21:56:24,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2018-09-26 21:56:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-26 21:56:24,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-09-26 21:56:24,947 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2018-09-26 21:56:24,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:24,947 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-09-26 21:56:24,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:56:24,948 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-09-26 21:56:24,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-26 21:56:24,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:24,948 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-09-26 21:56:24,949 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:24,949 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:24,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1750415713, now seen corresponding path program 18 times [2018-09-26 21:56:24,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:24,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:24,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:24,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:24,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:25,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:25,748 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:25,756 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:25,778 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:56:25,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:25,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:26,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:26,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 40 [2018-09-26 21:56:26,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:56:26,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:56:27,000 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:27,000 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 41 states. [2018-09-26 21:56:38,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:38,861 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2018-09-26 21:56:38,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:56:38,864 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2018-09-26 21:56:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:38,865 INFO L225 Difference]: With dead ends: 184 [2018-09-26 21:56:38,865 INFO L226 Difference]: Without dead ends: 138 [2018-09-26 21:56:38,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:38,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-26 21:56:38,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 91. [2018-09-26 21:56:38,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:56:38,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-26 21:56:38,877 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-09-26 21:56:38,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:38,877 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-26 21:56:38,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:56:38,878 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-26 21:56:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-26 21:56:38,878 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:38,878 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2018-09-26 21:56:38,879 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:38,879 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:38,879 INFO L82 PathProgramCache]: Analyzing trace with hash 310818374, now seen corresponding path program 19 times [2018-09-26 21:56:38,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:38,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:38,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:38,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:38,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:39,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:39,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:39,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:39,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:39,808 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:39,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-09-26 21:56:39,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:56:39,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:56:39,809 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:39,809 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 41 states. [2018-09-26 21:56:42,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:42,327 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-09-26 21:56:42,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:56:42,327 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2018-09-26 21:56:42,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:42,328 INFO L225 Difference]: With dead ends: 195 [2018-09-26 21:56:42,328 INFO L226 Difference]: Without dead ends: 96 [2018-09-26 21:56:42,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:42,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-26 21:56:42,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2018-09-26 21:56:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-26 21:56:42,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-09-26 21:56:42,341 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 90 [2018-09-26 21:56:42,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:42,341 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-09-26 21:56:42,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:56:42,341 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-09-26 21:56:42,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-26 21:56:42,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:42,342 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-09-26 21:56:42,342 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:42,342 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:42,342 INFO L82 PathProgramCache]: Analyzing trace with hash 2005850046, now seen corresponding path program 20 times [2018-09-26 21:56:42,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:42,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:42,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:42,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:42,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 12 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:43,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:43,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:43,341 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:43,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:43,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:43,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 288 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:45,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:45,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 58 [2018-09-26 21:56:45,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:56:45,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:56:45,373 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:45,373 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 59 states. [2018-09-26 21:57:16,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:16,409 INFO L93 Difference]: Finished difference Result 249 states and 255 transitions. [2018-09-26 21:57:16,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-26 21:57:16,409 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 93 [2018-09-26 21:57:16,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:16,411 INFO L225 Difference]: With dead ends: 249 [2018-09-26 21:57:16,411 INFO L226 Difference]: Without dead ends: 146 [2018-09-26 21:57:16,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:16,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-26 21:57:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2018-09-26 21:57:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:57:16,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-26 21:57:16,427 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 93 [2018-09-26 21:57:16,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:16,427 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-26 21:57:16,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:57:16,428 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-26 21:57:16,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:57:16,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:16,428 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-09-26 21:57:16,428 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:16,429 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:16,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1811736429, now seen corresponding path program 21 times [2018-09-26 21:57:16,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:16,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:16,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:16,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:16,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:17,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:17,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:17,909 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:57:17,937 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-26 21:57:17,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:17,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:19,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:19,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 46 [2018-09-26 21:57:19,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:57:19,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:57:19,792 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:19,792 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 47 states. [2018-09-26 21:57:37,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:37,934 INFO L93 Difference]: Finished difference Result 214 states and 219 transitions. [2018-09-26 21:57:37,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:57:37,934 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2018-09-26 21:57:37,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:37,935 INFO L225 Difference]: With dead ends: 214 [2018-09-26 21:57:37,935 INFO L226 Difference]: Without dead ends: 160 [2018-09-26 21:57:37,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:37,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-26 21:57:37,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2018-09-26 21:57:37,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-26 21:57:37,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-09-26 21:57:37,949 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2018-09-26 21:57:37,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:37,949 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-09-26 21:57:37,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:57:37,949 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-09-26 21:57:37,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-26 21:57:37,950 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:37,950 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2018-09-26 21:57:37,950 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:37,950 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:37,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1008713748, now seen corresponding path program 22 times [2018-09-26 21:57:37,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:37,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:37,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:37,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:37,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:38,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:38,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:38,341 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:57:38,358 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:57:38,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:38,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:38,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:38,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2018-09-26 21:57:38,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:57:38,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:57:38,960 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:38,960 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-09-26 21:57:42,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:42,518 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-09-26 21:57:42,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:57:42,518 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-09-26 21:57:42,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:42,519 INFO L225 Difference]: With dead ends: 225 [2018-09-26 21:57:42,519 INFO L226 Difference]: Without dead ends: 110 [2018-09-26 21:57:42,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:42,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-26 21:57:42,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2018-09-26 21:57:42,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-26 21:57:42,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-09-26 21:57:42,535 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 104 [2018-09-26 21:57:42,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:42,536 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-09-26 21:57:42,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:57:42,536 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-09-26 21:57:42,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-26 21:57:42,537 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:42,537 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-09-26 21:57:42,537 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:42,537 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:42,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1699483764, now seen corresponding path program 23 times [2018-09-26 21:57:42,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:42,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:42,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:42,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:42,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:43,785 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:43,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:43,793 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:57:43,820 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-26 21:57:43,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:43,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:45,809 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:45,809 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 49 [2018-09-26 21:57:45,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:57:45,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:57:45,810 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:45,810 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 50 states. [2018-09-26 21:58:04,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:04,499 INFO L93 Difference]: Finished difference Result 229 states and 234 transitions. [2018-09-26 21:58:04,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:58:04,506 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2018-09-26 21:58:04,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:04,507 INFO L225 Difference]: With dead ends: 229 [2018-09-26 21:58:04,507 INFO L226 Difference]: Without dead ends: 171 [2018-09-26 21:58:04,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:04,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-26 21:58:04,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 112. [2018-09-26 21:58:04,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-26 21:58:04,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-09-26 21:58:04,529 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-09-26 21:58:04,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:04,529 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-09-26 21:58:04,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:58:04,529 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-09-26 21:58:04,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-26 21:58:04,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:04,530 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2018-09-26 21:58:04,530 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:04,530 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:04,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1446534989, now seen corresponding path program 24 times [2018-09-26 21:58:04,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:04,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:04,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:04,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:04,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:05,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:05,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:05,034 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:05,068 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-26 21:58:05,069 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:05,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:05,749 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:05,750 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2018-09-26 21:58:05,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:58:05,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:58:05,751 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:05,751 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 50 states. [2018-09-26 21:58:10,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:10,271 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2018-09-26 21:58:10,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:58:10,271 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 111 [2018-09-26 21:58:10,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:10,272 INFO L225 Difference]: With dead ends: 240 [2018-09-26 21:58:10,272 INFO L226 Difference]: Without dead ends: 117 [2018-09-26 21:58:10,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:10,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-26 21:58:10,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2018-09-26 21:58:10,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 21:58:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-26 21:58:10,288 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 111 [2018-09-26 21:58:10,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:10,288 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-26 21:58:10,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:58:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-26 21:58:10,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-26 21:58:10,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:10,289 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-09-26 21:58:10,289 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:10,289 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:10,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2055366085, now seen corresponding path program 25 times [2018-09-26 21:58:10,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:10,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:10,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:10,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:10,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:11,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:11,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:11,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:11,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:14,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:14,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 52 [2018-09-26 21:58:14,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:58:14,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:58:14,120 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:14,120 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 53 states. [2018-09-26 21:58:35,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:35,447 INFO L93 Difference]: Finished difference Result 244 states and 249 transitions. [2018-09-26 21:58:35,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:58:35,447 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2018-09-26 21:58:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:35,448 INFO L225 Difference]: With dead ends: 244 [2018-09-26 21:58:35,448 INFO L226 Difference]: Without dead ends: 182 [2018-09-26 21:58:35,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-09-26 21:58:35,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 119. [2018-09-26 21:58:35,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-26 21:58:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-09-26 21:58:35,467 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2018-09-26 21:58:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:35,468 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-09-26 21:58:35,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:58:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-09-26 21:58:35,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-26 21:58:35,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:35,469 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2018-09-26 21:58:35,469 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:35,469 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:35,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1833851874, now seen corresponding path program 26 times [2018-09-26 21:58:35,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:35,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:35,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:35,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:35,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:36,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:36,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:36,117 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:36,140 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:36,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:36,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:36,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:36,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-09-26 21:58:36,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:58:36,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:58:36,824 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:36,824 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 53 states. [2018-09-26 21:58:41,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:41,156 INFO L93 Difference]: Finished difference Result 255 states and 259 transitions. [2018-09-26 21:58:41,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:58:41,157 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 118 [2018-09-26 21:58:41,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:41,158 INFO L225 Difference]: With dead ends: 255 [2018-09-26 21:58:41,158 INFO L226 Difference]: Without dead ends: 124 [2018-09-26 21:58:41,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:41,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-26 21:58:41,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2018-09-26 21:58:41,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-26 21:58:41,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-09-26 21:58:41,176 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 118 [2018-09-26 21:58:41,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:41,176 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-09-26 21:58:41,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:58:41,176 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-09-26 21:58:41,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-26 21:58:41,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:41,177 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-09-26 21:58:41,177 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:41,177 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:41,178 INFO L82 PathProgramCache]: Analyzing trace with hash 540940634, now seen corresponding path program 27 times [2018-09-26 21:58:41,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:41,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:41,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:41,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:41,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 16 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:42,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:42,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:42,921 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:42,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-26 21:58:42,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:42,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 512 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:46,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:46,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 74 [2018-09-26 21:58:46,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-26 21:58:46,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-26 21:58:46,548 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:46,548 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 75 states. Received shutdown request... [2018-09-26 21:59:02,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:59:02,289 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:59:02,295 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:59:02,295 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:59:02 BoogieIcfgContainer [2018-09-26 21:59:02,295 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:59:02,296 INFO L168 Benchmark]: Toolchain (without parser) took 257194.75 ms. Allocated memory was 1.6 GB in the beginning and 1.3 GB in the end (delta: -275.3 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 283.4 MB). Peak memory consumption was 306.8 MB. Max. memory is 7.1 GB. [2018-09-26 21:59:02,298 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:59:02,299 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.73 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:59:02,299 INFO L168 Benchmark]: Boogie Preprocessor took 24.26 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:59:02,300 INFO L168 Benchmark]: RCFGBuilder took 347.20 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:59:02,301 INFO L168 Benchmark]: TraceAbstraction took 256772.42 ms. Allocated memory was 1.6 GB in the beginning and 1.3 GB in the end (delta: -275.3 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 262.3 MB). Peak memory consumption was 285.6 MB. Max. memory is 7.1 GB. [2018-09-26 21:59:02,305 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.73 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.26 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 347.20 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 256772.42 ms. Allocated memory was 1.6 GB in the beginning and 1.3 GB in the end (delta: -275.3 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 262.3 MB). Peak memory consumption was 285.6 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 (122states) and FLOYD_HOARE automaton (currently 53 states, 75 states before enhancement), while ReachableStatesComputation was computing reachable states (85 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 256.7s OverallTime, 31 OverallIterations, 17 TraceHistogramMax, 213.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 399 SDtfs, 1791 SDslu, 6299 SDs, 0 SdLazy, 31542 SolverSat, 661 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 35.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2982 GetRequests, 1492 SyntacticMatches, 11 SemanticMatches, 1479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=122occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 30 MinimizatonAttempts, 531 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 40.9s InterpolantComputationTime, 3710 NumberOfCodeBlocks, 3673 NumberOfCodeBlocksAsserted, 190 NumberOfCheckSat, 3651 ConstructedInterpolants, 0 QuantifiedInterpolants, 2321934 SizeOfPredicates, 90 NumberOfNonLiveVariables, 2758 ConjunctsInSsa, 803 ConjunctsInUnsatCore, 59 InterpolantComputations, 3 PerfectInterpolantSequences, 5981/19298 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-0-2018-09-26_21-59-02-319.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-0-2018-09-26_21-59-02-319.csv Completed graceful shutdown