java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:48:09,188 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:48:09,190 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:48:09,206 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-09-30 20:48:09,244 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 [2018-09-30 20:48:09,260 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:48:09,261 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:48:09,262 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:48:09,262 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:48:09,262 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:48:09,263 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:48:09,263 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:48:09,263 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:48:09,263 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:48:09,263 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:48:09,264 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:48:09,264 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:48:09,264 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:48:09,264 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:48:09,264 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:48:09,265 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:48:09,265 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:48:09,265 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:48:09,265 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:48:09,265 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:48:09,266 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:48:09,266 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:48:09,266 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:48:09,266 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:48:09,266 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:48:09,267 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:48:09,267 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:48:09,267 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:48:09,267 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:48:09,267 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:48:09,268 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 20:48:09,314 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:48:09,327 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:48:09,334 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:48:09,336 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:48:09,337 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:48:09,337 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl [2018-09-30 20:48:09,338 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl' [2018-09-30 20:48:09,393 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:48:09,396 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:48:09,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:48:09,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:48:09,398 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:48:09,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:48:09" (1/1) ... [2018-09-30 20:48:09,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:48:09" (1/1) ... [2018-09-30 20:48:09,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:48:09,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:48:09,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:48:09,442 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:48:09,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:48:09" (1/1) ... [2018-09-30 20:48:09,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:48:09" (1/1) ... [2018-09-30 20:48:09,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:48:09" (1/1) ... [2018-09-30 20:48:09,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:48:09" (1/1) ... [2018-09-30 20:48:09,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:48:09" (1/1) ... [2018-09-30 20:48:09,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:48:09" (1/1) ... [2018-09-30 20:48:09,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:48:09" (1/1) ... [2018-09-30 20:48:09,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:48:09,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:48:09,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:48:09,468 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:48:09,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:48:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:48:09,542 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 20:48:09,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:48:09,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:48:09,827 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:48:09,827 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:48:09 BoogieIcfgContainer [2018-09-30 20:48:09,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:48:09,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:48:09,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:48:09,832 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:48:09,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:48:09" (1/2) ... [2018-09-30 20:48:09,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377650a6 and model type ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:48:09, skipping insertion in model container [2018-09-30 20:48:09,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:48:09" (2/2) ... [2018-09-30 20:48:09,837 INFO L112 eAbstractionObserver]: Analyzing ICFG ArrayInit02.bpl [2018-09-30 20:48:09,847 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:48:09,859 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:48:09,912 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:48:09,912 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:48:09,913 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:48:09,913 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:48:09,913 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:48:09,913 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:48:09,913 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:48:09,914 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:48:09,914 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:48:09,930 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-09-30 20:48:09,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:48:09,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:48:09,941 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-30 20:48:09,943 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:48:09,951 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:48:09,951 INFO L82 PathProgramCache]: Analyzing trace with hash 900035954, now seen corresponding path program 1 times [2018-09-30 20:48:09,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:48:09,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:48:10,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:10,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:48:10,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:10,251 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:48:10,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:48:10,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:48:10,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:48:10,270 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:48:10,271 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2018-09-30 20:48:10,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:48:10,601 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2018-09-30 20:48:10,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:48:10,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 20:48:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:48:10,614 INFO L225 Difference]: With dead ends: 26 [2018-09-30 20:48:10,615 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:48:10,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:48:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:48:10,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2018-09-30 20:48:10,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:48:10,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2018-09-30 20:48:10,652 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2018-09-30 20:48:10,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:48:10,653 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2018-09-30 20:48:10,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:48:10,653 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2018-09-30 20:48:10,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:48:10,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:48:10,654 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:48:10,654 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:48:10,654 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:48:10,654 INFO L82 PathProgramCache]: Analyzing trace with hash 429804648, now seen corresponding path program 1 times [2018-09-30 20:48:10,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:48:10,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:48:10,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:10,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:48:10,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:10,750 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:48:10,750 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-30 20:48:10,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:48:10,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:48:10,758 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:48:10,758 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 4 states. [2018-09-30 20:48:11,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:48:11,110 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-09-30 20:48:11,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:48:11,111 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-09-30 20:48:11,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:48:11,111 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:48:11,112 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:48:11,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:48:11,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:48:11,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-09-30 20:48:11,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:48:11,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2018-09-30 20:48:11,119 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 9 [2018-09-30 20:48:11,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:48:11,119 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2018-09-30 20:48:11,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:48:11,119 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2018-09-30 20:48:11,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:48:11,120 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:48:11,120 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:48:11,121 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:48:11,121 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:48:11,121 INFO L82 PathProgramCache]: Analyzing trace with hash 429806570, now seen corresponding path program 1 times [2018-09-30 20:48:11,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:48:11,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:48:11,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:11,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:48:11,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:48:11,184 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:48:11,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:48:11,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:48:11,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:48:11,185 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:48:11,186 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 3 states. [2018-09-30 20:48:11,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:48:11,258 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2018-09-30 20:48:11,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:48:11,258 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-09-30 20:48:11,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:48:11,260 INFO L225 Difference]: With dead ends: 24 [2018-09-30 20:48:11,261 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:48:11,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:48:11,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:48:11,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2018-09-30 20:48:11,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 20:48:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-09-30 20:48:11,264 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-09-30 20:48:11,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:48:11,265 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-09-30 20:48:11,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:48:11,265 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-09-30 20:48:11,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:48:11,266 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:48:11,266 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:48:11,266 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:48:11,266 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:48:11,267 INFO L82 PathProgramCache]: Analyzing trace with hash -2090155286, now seen corresponding path program 1 times [2018-09-30 20:48:11,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:48:11,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:48:11,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:11,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:48:11,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:11,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:48:11,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:48:11,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:48:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:11,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:48:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:11,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:48:11,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-09-30 20:48:11,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:48:11,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:48:11,788 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:48:11,789 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2018-09-30 20:48:12,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:48:12,727 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2018-09-30 20:48:12,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:48:12,727 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2018-09-30 20:48:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:48:12,728 INFO L225 Difference]: With dead ends: 26 [2018-09-30 20:48:12,728 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:48:12,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:48:12,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:48:12,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-09-30 20:48:12,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:48:12,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-30 20:48:12,732 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2018-09-30 20:48:12,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:48:12,733 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-30 20:48:12,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:48:12,733 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-30 20:48:12,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:48:12,734 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:48:12,734 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:48:12,734 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:48:12,734 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:48:12,735 INFO L82 PathProgramCache]: Analyzing trace with hash -368470767, now seen corresponding path program 1 times [2018-09-30 20:48:12,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:48:12,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:48:12,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:12,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:48:12,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:12,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:48:12,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:48:12,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:48:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:12,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:48:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:12,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:48:12,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-09-30 20:48:12,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:48:12,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:48:12,941 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:48:12,941 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2018-09-30 20:48:13,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:48:13,182 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-09-30 20:48:13,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:48:13,183 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 20:48:13,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:48:13,184 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:48:13,184 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:48:13,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:48:13,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:48:13,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-09-30 20:48:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 20:48:13,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-09-30 20:48:13,189 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2018-09-30 20:48:13,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:48:13,189 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-09-30 20:48:13,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:48:13,190 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-09-30 20:48:13,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:48:13,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:48:13,190 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:48:13,191 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:48:13,191 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:48:13,191 INFO L82 PathProgramCache]: Analyzing trace with hash -256855911, now seen corresponding path program 2 times [2018-09-30 20:48:13,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:48:13,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:48:13,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:13,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:48:13,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:13,354 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:48:13,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:48:13,362 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:48:13,370 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:48:13,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:48:13,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:48:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:13,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:48:13,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-09-30 20:48:13,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:48:13,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:48:13,602 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:48:13,602 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 15 states. [2018-09-30 20:48:15,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:48:15,090 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2018-09-30 20:48:15,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:48:15,091 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2018-09-30 20:48:15,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:48:15,092 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:48:15,093 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:48:15,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:48:15,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:48:15,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-09-30 20:48:15,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:48:15,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-09-30 20:48:15,098 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2018-09-30 20:48:15,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:48:15,099 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-09-30 20:48:15,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:48:15,099 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-09-30 20:48:15,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 20:48:15,100 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:48:15,100 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 20:48:15,100 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:48:15,101 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:48:15,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1324912968, now seen corresponding path program 3 times [2018-09-30 20:48:15,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:48:15,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:48:15,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:15,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:48:15,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:15,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:15,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:48:15,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:48:15,304 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:48:15,312 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:48:15,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:48:15,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:48:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:15,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:48:15,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-09-30 20:48:15,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:48:15,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:48:15,450 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:48:15,450 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 14 states. [2018-09-30 20:48:16,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:48:16,665 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-09-30 20:48:16,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:48:16,673 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2018-09-30 20:48:16,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:48:16,674 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:48:16,674 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:48:16,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:48:16,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:48:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-30 20:48:16,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:48:16,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-09-30 20:48:16,680 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-09-30 20:48:16,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:48:16,680 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-09-30 20:48:16,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:48:16,680 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-09-30 20:48:16,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 20:48:16,681 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:48:16,681 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 20:48:16,682 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:48:16,682 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:48:16,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1588570591, now seen corresponding path program 4 times [2018-09-30 20:48:16,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:48:16,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:48:16,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:16,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:48:16,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:16,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:48:16,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:48:16,819 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:48:16,829 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:48:16,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:48:16,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:48:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:17,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:48:17,056 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-09-30 20:48:17,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:48:17,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:48:17,056 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:48:17,057 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-09-30 20:48:17,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:48:17,708 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2018-09-30 20:48:17,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:48:17,709 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-09-30 20:48:17,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:48:17,710 INFO L225 Difference]: With dead ends: 60 [2018-09-30 20:48:17,710 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:48:17,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:48:17,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:48:17,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2018-09-30 20:48:17,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:48:17,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-30 20:48:17,717 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-09-30 20:48:17,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:48:17,717 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-30 20:48:17,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:48:17,717 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-30 20:48:17,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 20:48:17,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:48:17,718 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 20:48:17,719 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:48:17,719 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:48:17,719 INFO L82 PathProgramCache]: Analyzing trace with hash 366737255, now seen corresponding path program 5 times [2018-09-30 20:48:17,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:48:17,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:48:17,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:17,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:48:17,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:18,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:48:18,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:48:18,026 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:48:18,041 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-30 20:48:18,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:48:18,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:48:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:18,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:48:18,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-09-30 20:48:18,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:48:18,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:48:18,649 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:48:18,649 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 17 states. [2018-09-30 20:48:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:48:20,532 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2018-09-30 20:48:20,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:48:20,534 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-09-30 20:48:20,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:48:20,536 INFO L225 Difference]: With dead ends: 64 [2018-09-30 20:48:20,536 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 20:48:20,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:48:20,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 20:48:20,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2018-09-30 20:48:20,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:48:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-09-30 20:48:20,543 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2018-09-30 20:48:20,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:48:20,543 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-09-30 20:48:20,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:48:20,543 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-09-30 20:48:20,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:48:20,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:48:20,544 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2018-09-30 20:48:20,545 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:48:20,545 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:48:20,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1079885042, now seen corresponding path program 6 times [2018-09-30 20:48:20,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:48:20,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:48:20,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:20,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:48:20,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:20,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:48:20,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:48:20,696 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:48:20,718 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-30 20:48:20,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:48:20,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:48:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:21,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:48:21,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-09-30 20:48:21,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:48:21,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:48:21,018 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:48:21,018 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 17 states. [2018-09-30 20:48:21,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:48:21,663 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-09-30 20:48:21,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:48:21,664 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2018-09-30 20:48:21,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:48:21,665 INFO L225 Difference]: With dead ends: 75 [2018-09-30 20:48:21,665 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 20:48:21,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:48:21,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 20:48:21,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2018-09-30 20:48:21,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 20:48:21,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-09-30 20:48:21,672 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2018-09-30 20:48:21,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:48:21,672 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-09-30 20:48:21,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:48:21,672 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-09-30 20:48:21,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 20:48:21,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:48:21,673 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-09-30 20:48:21,674 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:48:21,674 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:48:21,674 INFO L82 PathProgramCache]: Analyzing trace with hash -921359226, now seen corresponding path program 7 times [2018-09-30 20:48:21,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:48:21,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:48:21,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:21,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:48:21,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:21,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:48:21,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:48:21,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:48:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:21,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:48:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:22,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:48:22,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2018-09-30 20:48:22,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:48:22,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:48:22,225 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:48:22,225 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2018-09-30 20:48:24,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:48:24,672 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2018-09-30 20:48:24,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:48:24,673 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2018-09-30 20:48:24,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:48:24,674 INFO L225 Difference]: With dead ends: 79 [2018-09-30 20:48:24,674 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 20:48:24,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:48:24,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 20:48:24,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2018-09-30 20:48:24,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 20:48:24,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-09-30 20:48:24,683 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2018-09-30 20:48:24,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:48:24,683 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-09-30 20:48:24,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:48:24,684 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-09-30 20:48:24,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 20:48:24,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:48:24,685 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2018-09-30 20:48:24,685 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:48:24,685 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:48:24,686 INFO L82 PathProgramCache]: Analyzing trace with hash 451793069, now seen corresponding path program 8 times [2018-09-30 20:48:24,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:48:24,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:48:24,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:24,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:48:24,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:24,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:48:24,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:48:24,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:48:24,880 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:48:24,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:48:24,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:48:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:25,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:48:25,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-09-30 20:48:25,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:48:25,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:48:25,276 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:48:25,276 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2018-09-30 20:48:25,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:48:25,818 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2018-09-30 20:48:25,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:48:25,819 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2018-09-30 20:48:25,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:48:25,820 INFO L225 Difference]: With dead ends: 90 [2018-09-30 20:48:25,820 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:48:25,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:48:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:48:25,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-09-30 20:48:25,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 20:48:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-09-30 20:48:25,828 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2018-09-30 20:48:25,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:48:25,828 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-09-30 20:48:25,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:48:25,828 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-09-30 20:48:25,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 20:48:25,829 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:48:25,829 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-09-30 20:48:25,830 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:48:25,830 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:48:25,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1868574667, now seen corresponding path program 9 times [2018-09-30 20:48:25,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:48:25,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:48:25,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:25,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:48:25,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 5 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:26,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:48:26,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:48:26,102 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:48:26,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 20:48:26,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:48:26,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:48:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 50 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:26,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:48:26,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2018-09-30 20:48:26,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:48:26,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:48:26,635 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:48:26,635 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 31 states. [2018-09-30 20:48:32,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:48:32,026 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-09-30 20:48:32,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:48:32,026 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2018-09-30 20:48:32,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:48:32,027 INFO L225 Difference]: With dead ends: 116 [2018-09-30 20:48:32,028 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 20:48:32,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time [2018-09-30 20:48:32,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 20:48:32,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2018-09-30 20:48:32,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 20:48:32,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-09-30 20:48:32,036 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 44 [2018-09-30 20:48:32,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:48:32,037 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-09-30 20:48:32,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:48:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-09-30 20:48:32,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 20:48:32,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:48:32,038 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-09-30 20:48:32,038 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:48:32,038 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:48:32,039 INFO L82 PathProgramCache]: Analyzing trace with hash 2089942100, now seen corresponding path program 10 times [2018-09-30 20:48:32,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:48:32,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:48:32,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:32,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:48:32,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:32,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:48:32,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:48:32,373 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:48:32,384 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:48:32,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:48:32,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:48:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:32,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:48:32,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2018-09-30 20:48:32,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:48:32,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:48:32,758 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:48:32,758 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-09-30 20:48:36,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:48:36,889 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2018-09-30 20:48:36,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:48:36,889 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-09-30 20:48:36,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:48:36,890 INFO L225 Difference]: With dead ends: 109 [2018-09-30 20:48:36,890 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 20:48:36,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:48:36,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 20:48:36,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2018-09-30 20:48:36,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 20:48:36,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-30 20:48:36,900 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2018-09-30 20:48:36,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:48:36,901 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-30 20:48:36,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:48:36,901 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-30 20:48:36,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 20:48:36,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:48:36,902 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2018-09-30 20:48:36,902 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:48:36,902 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:48:36,903 INFO L82 PathProgramCache]: Analyzing trace with hash 549587323, now seen corresponding path program 11 times [2018-09-30 20:48:36,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:48:36,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:48:36,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:36,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:48:36,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:37,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:48:37,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:48:37,208 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:48:37,254 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 20:48:37,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:48:37,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:48:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:37,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:48:37,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-09-30 20:48:37,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:48:37,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:48:37,678 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:48:37,678 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 26 states. [2018-09-30 20:48:38,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:48:38,675 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2018-09-30 20:48:38,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:48:38,675 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2018-09-30 20:48:38,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:48:38,676 INFO L225 Difference]: With dead ends: 120 [2018-09-30 20:48:38,676 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 20:48:38,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:48:38,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 20:48:38,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-09-30 20:48:38,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 20:48:38,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-09-30 20:48:38,687 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2018-09-30 20:48:38,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:48:38,688 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-09-30 20:48:38,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:48:38,688 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-09-30 20:48:38,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 20:48:38,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:48:38,689 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-09-30 20:48:38,689 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:48:38,689 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:48:38,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1743111421, now seen corresponding path program 12 times [2018-09-30 20:48:38,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:48:38,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:48:38,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:38,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:48:38,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:39,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:48:39,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:48:39,065 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:48:39,084 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 20:48:39,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:48:39,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:48:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:39,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:48:39,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 28 [2018-09-30 20:48:39,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:48:39,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:48:39,486 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:48:39,486 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 29 states. [2018-09-30 20:48:45,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:48:45,025 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2018-09-30 20:48:45,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:48:45,026 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2018-09-30 20:48:45,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:48:45,027 INFO L225 Difference]: With dead ends: 124 [2018-09-30 20:48:45,027 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 20:48:45,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:48:45,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 20:48:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2018-09-30 20:48:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 20:48:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-09-30 20:48:45,039 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2018-09-30 20:48:45,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:48:45,039 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-09-30 20:48:45,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:48:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-09-30 20:48:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 20:48:45,041 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:48:45,041 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2018-09-30 20:48:45,041 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:48:45,041 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:48:45,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1415751510, now seen corresponding path program 13 times [2018-09-30 20:48:45,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:48:45,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:48:45,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:45,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:48:45,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:45,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:48:45,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:48:45,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:48:45,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:45,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:48:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:45,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:48:45,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-09-30 20:48:45,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:48:45,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:48:45,839 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:48:45,840 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 29 states. [2018-09-30 20:48:47,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:48:47,371 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-09-30 20:48:47,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:48:47,371 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2018-09-30 20:48:47,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:48:47,372 INFO L225 Difference]: With dead ends: 135 [2018-09-30 20:48:47,372 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 20:48:47,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:48:47,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 20:48:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2018-09-30 20:48:47,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 20:48:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-09-30 20:48:47,385 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-09-30 20:48:47,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:48:47,385 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-09-30 20:48:47,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:48:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-09-30 20:48:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 20:48:47,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:48:47,387 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-09-30 20:48:47,387 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:48:47,387 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:48:47,387 INFO L82 PathProgramCache]: Analyzing trace with hash 175889954, now seen corresponding path program 14 times [2018-09-30 20:48:47,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:48:47,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:48:47,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:47,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:48:47,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 8 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:47,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:48:47,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:48:47,938 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:48:47,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:48:47,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:48:47,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:48:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 128 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:48,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:48:48,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 42 [2018-09-30 20:48:48,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:48:48,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:48:48,627 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:48:48,628 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 43 states. [2018-09-30 20:48:56,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:48:56,491 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-09-30 20:48:56,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:48:56,492 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 65 [2018-09-30 20:48:56,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:48:56,493 INFO L225 Difference]: With dead ends: 173 [2018-09-30 20:48:56,493 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 20:48:56,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s Time [2018-09-30 20:48:56,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 20:48:56,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2018-09-30 20:48:56,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 20:48:56,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-09-30 20:48:56,505 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 65 [2018-09-30 20:48:56,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:48:56,506 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-09-30 20:48:56,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:48:56,506 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-09-30 20:48:56,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 20:48:56,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:48:56,507 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-09-30 20:48:56,507 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:48:56,507 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:48:56,508 INFO L82 PathProgramCache]: Analyzing trace with hash 2036938705, now seen corresponding path program 15 times [2018-09-30 20:48:56,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:48:56,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:48:56,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:56,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:48:56,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:48:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:48:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 9 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:57,000 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:48:57,000 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:48:57,007 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:48:57,030 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-30 20:48:57,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:48:57,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:48:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 162 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:48:58,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:48:58,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2018-09-30 20:48:58,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:48:58,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:48:58,027 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:48:58,027 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 47 states. [2018-09-30 20:49:07,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:07,301 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2018-09-30 20:49:07,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 20:49:07,302 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2018-09-30 20:49:07,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:07,303 INFO L225 Difference]: With dead ends: 192 [2018-09-30 20:49:07,303 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 20:49:07,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s Time [2018-09-30 20:49:07,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 20:49:07,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2018-09-30 20:49:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 20:49:07,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-09-30 20:49:07,313 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 72 [2018-09-30 20:49:07,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:07,314 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-09-30 20:49:07,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:49:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-09-30 20:49:07,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 20:49:07,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:07,315 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-09-30 20:49:07,315 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:07,316 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:07,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1070649840, now seen corresponding path program 16 times [2018-09-30 20:49:07,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:07,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:07,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:07,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:07,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:07,946 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:07,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:07,954 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:49:07,969 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:49:07,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:07,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:08,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:08,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2018-09-30 20:49:08,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:49:08,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:49:08,542 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:08,542 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 38 states. [2018-09-30 20:49:17,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:17,844 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2018-09-30 20:49:17,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:49:17,845 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 79 [2018-09-30 20:49:17,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:17,845 INFO L225 Difference]: With dead ends: 169 [2018-09-30 20:49:17,845 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 20:49:17,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time [2018-09-30 20:49:17,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 20:49:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2018-09-30 20:49:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 20:49:17,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-09-30 20:49:17,857 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2018-09-30 20:49:17,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:17,858 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-09-30 20:49:17,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:49:17,858 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-09-30 20:49:17,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 20:49:17,859 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:17,859 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2018-09-30 20:49:17,859 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:17,859 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:17,859 INFO L82 PathProgramCache]: Analyzing trace with hash -685461225, now seen corresponding path program 17 times [2018-09-30 20:49:17,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:17,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:17,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:17,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:17,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:18,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:18,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:18,116 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:49:18,136 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 20:49:18,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:18,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:18,410 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:18,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:18,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-09-30 20:49:18,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:49:18,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:49:18,431 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:18,431 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 38 states. [2018-09-30 20:49:20,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:20,365 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2018-09-30 20:49:20,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:49:20,365 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2018-09-30 20:49:20,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:20,366 INFO L225 Difference]: With dead ends: 180 [2018-09-30 20:49:20,366 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 20:49:20,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:49:20,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 20:49:20,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2018-09-30 20:49:20,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 20:49:20,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-09-30 20:49:20,378 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2018-09-30 20:49:20,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:20,378 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-09-30 20:49:20,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:49:20,378 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-09-30 20:49:20,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 20:49:20,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:20,379 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-09-30 20:49:20,379 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:20,379 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:20,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1750415713, now seen corresponding path program 18 times [2018-09-30 20:49:20,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:20,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:20,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:20,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:20,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:21,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:21,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:21,711 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:49:21,736 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:49:21,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:21,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:22,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:22,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 40 [2018-09-30 20:49:22,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:49:22,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:49:22,447 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:22,447 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 41 states. [2018-09-30 20:49:32,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:32,513 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2018-09-30 20:49:32,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:49:32,516 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2018-09-30 20:49:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:32,518 INFO L225 Difference]: With dead ends: 184 [2018-09-30 20:49:32,518 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 20:49:32,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time [2018-09-30 20:49:32,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 20:49:32,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 91. [2018-09-30 20:49:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 20:49:32,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-30 20:49:32,530 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-09-30 20:49:32,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:32,531 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-30 20:49:32,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:49:32,531 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-30 20:49:32,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 20:49:32,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:32,532 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2018-09-30 20:49:32,532 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:32,532 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:32,532 INFO L82 PathProgramCache]: Analyzing trace with hash 310818374, now seen corresponding path program 19 times [2018-09-30 20:49:32,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:32,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:32,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:32,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:32,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:33,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:33,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:33,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:33,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:33,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:33,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:33,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-09-30 20:49:33,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:49:33,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:49:33,398 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:33,398 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 41 states. [2018-09-30 20:49:35,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:35,647 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-09-30 20:49:35,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:49:35,649 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2018-09-30 20:49:35,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:35,650 INFO L225 Difference]: With dead ends: 195 [2018-09-30 20:49:35,650 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 20:49:35,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:49:35,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 20:49:35,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2018-09-30 20:49:35,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 20:49:35,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-09-30 20:49:35,662 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 90 [2018-09-30 20:49:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:35,662 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-09-30 20:49:35,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:49:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-09-30 20:49:35,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 20:49:35,663 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:35,663 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-09-30 20:49:35,663 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:35,664 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:35,664 INFO L82 PathProgramCache]: Analyzing trace with hash 2005850046, now seen corresponding path program 20 times [2018-09-30 20:49:35,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:35,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:35,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:35,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:49:35,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 12 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:36,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:36,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:36,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:49:36,336 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:49:36,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:36,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 288 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:37,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:37,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 58 [2018-09-30 20:49:37,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:49:37,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:49:37,702 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:37,702 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 59 states. [2018-09-30 20:49:52,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:49:52,219 INFO L93 Difference]: Finished difference Result 249 states and 255 transitions. [2018-09-30 20:49:52,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 20:49:52,219 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 93 [2018-09-30 20:49:52,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:49:52,220 INFO L225 Difference]: With dead ends: 249 [2018-09-30 20:49:52,221 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 20:49:52,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6s Time [2018-09-30 20:49:52,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 20:49:52,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2018-09-30 20:49:52,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 20:49:52,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-30 20:49:52,236 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 93 [2018-09-30 20:49:52,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:49:52,236 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-30 20:49:52,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:49:52,236 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-30 20:49:52,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 20:49:52,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:49:52,237 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-09-30 20:49:52,237 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:49:52,237 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:49:52,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1811736429, now seen corresponding path program 21 times [2018-09-30 20:49:52,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:49:52,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:49:52,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:52,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:49:52,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:49:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:49:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:52,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:49:52,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:49:52,969 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:49:53,004 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 20:49:53,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:49:53,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:49:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:49:54,202 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:49:54,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 46 [2018-09-30 20:49:54,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:49:54,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:49:54,203 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:49:54,203 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 47 states. [2018-09-30 20:50:09,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:09,432 INFO L93 Difference]: Finished difference Result 214 states and 219 transitions. [2018-09-30 20:50:09,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:50:09,433 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2018-09-30 20:50:09,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:09,434 INFO L225 Difference]: With dead ends: 214 [2018-09-30 20:50:09,434 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 20:50:09,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time [2018-09-30 20:50:09,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 20:50:09,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2018-09-30 20:50:09,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 20:50:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-09-30 20:50:09,449 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2018-09-30 20:50:09,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:09,449 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-09-30 20:50:09,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:50:09,450 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-09-30 20:50:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 20:50:09,450 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:09,450 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2018-09-30 20:50:09,451 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:09,451 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:09,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1008713748, now seen corresponding path program 22 times [2018-09-30 20:50:09,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:09,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:09,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:09,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:09,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:10,005 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:10,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:10,016 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:50:10,033 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:50:10,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:10,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:10,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:10,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2018-09-30 20:50:10,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:50:10,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:50:10,442 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:10,442 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-09-30 20:50:13,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:13,318 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-09-30 20:50:13,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:50:13,319 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-09-30 20:50:13,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:13,320 INFO L225 Difference]: With dead ends: 225 [2018-09-30 20:50:13,320 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 20:50:13,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:50:13,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 20:50:13,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2018-09-30 20:50:13,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 20:50:13,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-09-30 20:50:13,336 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 104 [2018-09-30 20:50:13,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:13,336 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-09-30 20:50:13,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:50:13,337 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-09-30 20:50:13,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 20:50:13,337 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:13,337 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-09-30 20:50:13,337 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:13,337 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:13,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1699483764, now seen corresponding path program 23 times [2018-09-30 20:50:13,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:13,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:13,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:13,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:13,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:14,319 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:14,319 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:14,326 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:50:14,355 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 20:50:14,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:14,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:15,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:15,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 49 [2018-09-30 20:50:15,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:50:15,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:50:15,305 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:15,305 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 50 states. [2018-09-30 20:50:30,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:30,183 INFO L93 Difference]: Finished difference Result 229 states and 234 transitions. [2018-09-30 20:50:30,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:50:30,194 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2018-09-30 20:50:30,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:30,194 INFO L225 Difference]: With dead ends: 229 [2018-09-30 20:50:30,194 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 20:50:30,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time [2018-09-30 20:50:30,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 20:50:30,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 112. [2018-09-30 20:50:30,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 20:50:30,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-09-30 20:50:30,217 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-09-30 20:50:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:30,218 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-09-30 20:50:30,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:50:30,218 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-09-30 20:50:30,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 20:50:30,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:30,219 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2018-09-30 20:50:30,219 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:30,219 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:30,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1446534989, now seen corresponding path program 24 times [2018-09-30 20:50:30,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:30,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:30,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:30,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:30,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:30,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:30,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:30,566 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:50:30,595 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 20:50:30,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:30,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:30,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:30,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2018-09-30 20:50:30,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:50:30,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:50:30,995 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:30,995 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 50 states. [2018-09-30 20:50:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:35,068 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2018-09-30 20:50:35,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:50:35,069 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 111 [2018-09-30 20:50:35,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:35,070 INFO L225 Difference]: With dead ends: 240 [2018-09-30 20:50:35,070 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 20:50:35,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:50:35,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 20:50:35,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2018-09-30 20:50:35,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 20:50:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-30 20:50:35,094 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 111 [2018-09-30 20:50:35,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:35,094 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-30 20:50:35,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:50:35,095 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-30 20:50:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 20:50:35,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:35,095 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-09-30 20:50:35,095 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:35,095 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:35,096 INFO L82 PathProgramCache]: Analyzing trace with hash -2055366085, now seen corresponding path program 25 times [2018-09-30 20:50:35,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:35,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:35,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:35,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:35,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:36,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:36,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:36,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:36,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:37,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:37,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 52 [2018-09-30 20:50:37,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:50:37,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:50:37,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:37,319 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 53 states. [2018-09-30 20:50:54,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:54,250 INFO L93 Difference]: Finished difference Result 244 states and 249 transitions. [2018-09-30 20:50:54,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 20:50:54,251 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2018-09-30 20:50:54,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:54,252 INFO L225 Difference]: With dead ends: 244 [2018-09-30 20:50:54,252 INFO L226 Difference]: Without dead ends: 182 [2018-09-30 20:50:54,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time [2018-09-30 20:50:54,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-09-30 20:50:54,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 119. [2018-09-30 20:50:54,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 20:50:54,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-09-30 20:50:54,270 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2018-09-30 20:50:54,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:54,271 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-09-30 20:50:54,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:50:54,271 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-09-30 20:50:54,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 20:50:54,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:54,271 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2018-09-30 20:50:54,271 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:54,272 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:54,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1833851874, now seen corresponding path program 26 times [2018-09-30 20:50:54,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:54,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:54,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:54,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:50:54,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:50:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:54,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:50:54,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:50:54,666 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:50:54,692 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:50:54,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:50:54,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:50:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:50:55,316 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:50:55,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-09-30 20:50:55,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:50:55,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:50:55,317 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:50:55,317 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 53 states. [2018-09-30 20:50:58,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:50:58,789 INFO L93 Difference]: Finished difference Result 255 states and 259 transitions. [2018-09-30 20:50:58,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:50:58,791 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 118 [2018-09-30 20:50:58,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:50:58,791 INFO L225 Difference]: With dead ends: 255 [2018-09-30 20:50:58,791 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 20:50:58,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:50:58,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 20:50:58,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2018-09-30 20:50:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 20:50:58,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-09-30 20:50:58,808 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 118 [2018-09-30 20:50:58,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:50:58,809 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-09-30 20:50:58,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:50:58,809 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-09-30 20:50:58,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-30 20:50:58,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:50:58,809 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-09-30 20:50:58,810 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:50:58,810 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:50:58,810 INFO L82 PathProgramCache]: Analyzing trace with hash 540940634, now seen corresponding path program 27 times [2018-09-30 20:50:58,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:50:58,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:50:58,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:58,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:50:58,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:50:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 16 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:00,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:00,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:00,372 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:51:00,403 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 20:51:00,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:00,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 512 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:01,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:01,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 74 [2018-09-30 20:51:01,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 20:51:01,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 20:51:01,995 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:01,995 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 75 states. [2018-09-30 20:51:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:25,604 INFO L93 Difference]: Finished difference Result 325 states and 331 transitions. [2018-09-30 20:51:25,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 20:51:25,604 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 121 [2018-09-30 20:51:25,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:25,605 INFO L225 Difference]: With dead ends: 325 [2018-09-30 20:51:25,605 INFO L226 Difference]: Without dead ends: 190 [2018-09-30 20:51:25,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3s Time [2018-09-30 20:51:25,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-09-30 20:51:25,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 129. [2018-09-30 20:51:25,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 20:51:25,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-09-30 20:51:25,628 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 121 [2018-09-30 20:51:25,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:25,628 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-09-30 20:51:25,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 20:51:25,628 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-09-30 20:51:25,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 20:51:25,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:25,629 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-09-30 20:51:25,629 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:25,630 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:25,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1991581943, now seen corresponding path program 28 times [2018-09-30 20:51:25,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:25,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:25,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:25,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:25,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:26,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:26,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:26,975 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:51:26,997 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:51:26,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:27,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:28,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:28,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 58 [2018-09-30 20:51:28,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:51:28,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:51:28,330 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:28,330 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-09-30 20:51:52,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:52,790 INFO L93 Difference]: Finished difference Result 274 states and 279 transitions. [2018-09-30 20:51:52,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 20:51:52,791 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-09-30 20:51:52,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:52,792 INFO L225 Difference]: With dead ends: 274 [2018-09-30 20:51:52,792 INFO L226 Difference]: Without dead ends: 204 [2018-09-30 20:51:52,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s Time [2018-09-30 20:51:52,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-09-30 20:51:52,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2018-09-30 20:51:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 20:51:52,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-09-30 20:51:52,819 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-09-30 20:51:52,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:52,820 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-09-30 20:51:52,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:51:52,820 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-09-30 20:51:52,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 20:51:52,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:52,821 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1] [2018-09-30 20:51:52,821 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:52,821 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:52,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1942976080, now seen corresponding path program 29 times [2018-09-30 20:51:52,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:52,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:52,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:52,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:52,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:51:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:53,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:51:53,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:51:53,369 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:51:53,403 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 20:51:53,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:51:53,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:51:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:51:54,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:51:54,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2018-09-30 20:51:54,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:51:54,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:51:54,276 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:51:54,276 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 59 states. [2018-09-30 20:51:58,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:51:58,670 INFO L93 Difference]: Finished difference Result 285 states and 289 transitions. [2018-09-30 20:51:58,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:51:58,671 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 132 [2018-09-30 20:51:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:51:58,672 INFO L225 Difference]: With dead ends: 285 [2018-09-30 20:51:58,672 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 20:51:58,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:51:58,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 20:51:58,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2018-09-30 20:51:58,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 20:51:58,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-09-30 20:51:58,696 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-09-30 20:51:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:51:58,696 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-09-30 20:51:58,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:51:58,696 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-09-30 20:51:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 20:51:58,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:51:58,697 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-09-30 20:51:58,697 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:51:58,697 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:51:58,697 INFO L82 PathProgramCache]: Analyzing trace with hash 220943656, now seen corresponding path program 30 times [2018-09-30 20:51:58,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:51:58,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:51:58,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:58,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:51:58,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:51:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:52:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 18 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:00,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:52:00,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:52:00,044 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:52:00,088 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-30 20:52:00,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:52:00,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:52:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 648 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:52:02,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:52:02,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 82 [2018-09-30 20:52:02,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 20:52:02,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 20:52:02,134 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:52:02,134 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 83 states. Received shutdown request... [2018-09-30 20:52:23,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 20:52:23,230 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:52:23,235 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:52:23,236 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:52:23 BoogieIcfgContainer [2018-09-30 20:52:23,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:52:23,237 INFO L168 Benchmark]: Toolchain (without parser) took 253842.65 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -114.3 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 130.5 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2018-09-30 20:52:23,239 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:52:23,239 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.87 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:52:23,240 INFO L168 Benchmark]: Boogie Preprocessor took 26.12 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:52:23,240 INFO L168 Benchmark]: RCFGBuilder took 359.80 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:52:23,241 INFO L168 Benchmark]: TraceAbstraction took 253407.07 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -114.3 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 109.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:52:23,245 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 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.87 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.12 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 359.80 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 253407.07 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -114.3 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 109.3 MB). There was no memory consumed. 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 (136states) and FLOYD_HOARE automaton (currently 96 states, 83 states before enhancement), while ReachableStatesComputation was computing reachable states (170 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 253.3s OverallTime, 34 OverallIterations, 19 TraceHistogramMax, 214.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 476 SDtfs, 2342 SDslu, 8569 SDs, 0 SdLazy, 43302 SolverSat, 900 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 48.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3691 GetRequests, 1807 SyntacticMatches, 12 SemanticMatches, 1872 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=136occurred in iteration=33, 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, 33 MinimizatonAttempts, 665 StatesRemovedByMinimization, 33 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 35.6s InterpolantComputationTime, 4500 NumberOfCodeBlocks, 4445 NumberOfCodeBlocksAsserted, 233 NumberOfCheckSat, 4435 ConstructedInterpolants, 0 QuantifiedInterpolants, 3164871 SizeOfPredicates, 100 NumberOfNonLiveVariables, 3307 ConjunctsInSsa, 962 ConjunctsInUnsatCore, 65 InterpolantComputations, 3 PerfectInterpolantSequences, 8013/26124 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-0-2018-09-30_20-52-23-256.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-0-2018-09-30_20-52-23-256.csv Completed graceful shutdown