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 0.1.23-2eb0a67 [2018-10-03 09:16:30,420 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 09:16:30,423 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 09:16:30,437 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-03 09:16:30,468 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-03 09:16:30,483 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 09:16:30,484 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 09:16:30,484 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 09:16:30,485 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 09:16:30,485 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 09:16:30,485 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 09:16:30,486 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 09:16:30,486 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 09:16:30,486 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 09:16:30,486 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 09:16:30,486 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 09:16:30,486 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 09:16:30,487 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 09:16:30,487 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 09:16:30,487 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 09:16:30,487 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 09:16:30,487 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 09:16:30,488 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 09:16:30,488 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 09:16:30,488 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 09:16:30,488 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 09:16:30,488 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 09:16:30,489 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 09:16:30,489 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 09:16:30,489 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 09:16:30,489 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 09:16:30,489 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 09:16:30,490 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 09:16:30,490 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 09:16:30,490 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 09:16:30,490 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-03 09:16:30,534 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 09:16:30,547 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 09:16:30,554 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 09:16:30,555 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 09:16:30,556 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 09:16:30,557 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl [2018-10-03 09:16:30,557 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl' [2018-10-03 09:16:30,610 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 09:16:30,614 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 09:16:30,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 09:16:30,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 09:16:30,617 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 09:16:30,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:30" (1/1) ... [2018-10-03 09:16:30,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:30" (1/1) ... [2018-10-03 09:16:30,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 09:16:30,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 09:16:30,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 09:16:30,661 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 09:16:30,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:30" (1/1) ... [2018-10-03 09:16:30,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:30" (1/1) ... [2018-10-03 09:16:30,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:30" (1/1) ... [2018-10-03 09:16:30,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:30" (1/1) ... [2018-10-03 09:16:30,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:30" (1/1) ... [2018-10-03 09:16:30,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:30" (1/1) ... [2018-10-03 09:16:30,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:30" (1/1) ... [2018-10-03 09:16:30,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 09:16:30,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 09:16:30,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 09:16:30,687 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 09:16:30,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 09:16:30,750 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-03 09:16:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-03 09:16:30,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-03 09:16:31,087 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-03 09:16:31,088 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 09:16:31 BoogieIcfgContainer [2018-10-03 09:16:31,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 09:16:31,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 09:16:31,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 09:16:31,092 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 09:16:31,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:30" (1/2) ... [2018-10-03 09:16:31,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8fb824 and model type ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 09:16:31, skipping insertion in model container [2018-10-03 09:16:31,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 09:16:31" (2/2) ... [2018-10-03 09:16:31,096 INFO L112 eAbstractionObserver]: Analyzing ICFG ArrayInit02.bpl [2018-10-03 09:16:31,107 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 09:16:31,114 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 09:16:31,163 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 09:16:31,164 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 09:16:31,164 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 09:16:31,164 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 09:16:31,165 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 09:16:31,165 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 09:16:31,165 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 09:16:31,165 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 09:16:31,165 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 09:16:31,181 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-10-03 09:16:31,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 09:16:31,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:31,188 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-03 09:16:31,189 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:31,196 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:31,196 INFO L82 PathProgramCache]: Analyzing trace with hash 900035954, now seen corresponding path program 1 times [2018-10-03 09:16:31,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:31,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:31,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:31,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:31,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:31,479 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 09:16:31,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-03 09:16:31,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 09:16:31,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 09:16:31,497 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:31,499 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2018-10-03 09:16:31,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:31,652 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2018-10-03 09:16:31,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 09:16:31,655 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-03 09:16:31,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:31,672 INFO L225 Difference]: With dead ends: 26 [2018-10-03 09:16:31,672 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 09:16:31,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime 3 [2018-10-03 09:16:31,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 09:16:31,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2018-10-03 09:16:31,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 09:16:31,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2018-10-03 09:16:31,714 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2018-10-03 09:16:31,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:31,714 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2018-10-03 09:16:31,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 09:16:31,714 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2018-10-03 09:16:31,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 09:16:31,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:31,715 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-03 09:16:31,715 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:31,715 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:31,716 INFO L82 PathProgramCache]: Analyzing trace with hash 429804648, now seen corresponding path program 1 times [2018-10-03 09:16:31,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:31,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:31,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:31,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:31,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:31,790 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 09:16:31,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-03 09:16:31,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 09:16:31,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 09:16:31,792 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:31,792 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 4 states. [2018-10-03 09:16:31,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:31,857 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-10-03 09:16:31,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 09:16:31,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-10-03 09:16:31,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:31,858 INFO L225 Difference]: With dead ends: 25 [2018-10-03 09:16:31,859 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 09:16:31,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 3 [2018-10-03 09:16:31,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 09:16:31,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-03 09:16:31,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 09:16:31,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2018-10-03 09:16:31,866 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 9 [2018-10-03 09:16:31,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:31,866 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2018-10-03 09:16:31,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 09:16:31,866 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2018-10-03 09:16:31,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 09:16:31,867 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:31,867 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-03 09:16:31,868 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:31,868 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:31,868 INFO L82 PathProgramCache]: Analyzing trace with hash 429806570, now seen corresponding path program 1 times [2018-10-03 09:16:31,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:31,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:31,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:31,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:31,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-03 09:16:31,925 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 09:16:31,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-03 09:16:31,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 09:16:31,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 09:16:31,927 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:31,927 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 3 states. [2018-10-03 09:16:31,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:31,955 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2018-10-03 09:16:31,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 09:16:31,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-10-03 09:16:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:31,957 INFO L225 Difference]: With dead ends: 24 [2018-10-03 09:16:31,957 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 09:16:31,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-03 09:16:31,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 09:16:31,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2018-10-03 09:16:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-03 09:16:31,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-10-03 09:16:31,960 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-10-03 09:16:31,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:31,961 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-10-03 09:16:31,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 09:16:31,961 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-10-03 09:16:31,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 09:16:31,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:31,962 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-03 09:16:31,962 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:31,962 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:31,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2090155286, now seen corresponding path program 1 times [2018-10-03 09:16:31,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:31,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:31,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:31,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:31,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:32,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:32,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:32,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:32,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:32,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:32,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-10-03 09:16:32,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 09:16:32,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 09:16:32,387 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:32,388 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2018-10-03 09:16:32,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:32,869 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2018-10-03 09:16:32,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 09:16:32,870 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2018-10-03 09:16:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:32,871 INFO L225 Difference]: With dead ends: 26 [2018-10-03 09:16:32,871 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 09:16:32,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 5 [2018-10-03 09:16:32,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 09:16:32,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-10-03 09:16:32,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 09:16:32,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-03 09:16:32,876 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2018-10-03 09:16:32,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:32,877 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-03 09:16:32,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 09:16:32,877 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-03 09:16:32,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 09:16:32,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:32,878 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-03 09:16:32,879 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:32,879 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:32,879 INFO L82 PathProgramCache]: Analyzing trace with hash -368470767, now seen corresponding path program 1 times [2018-10-03 09:16:32,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:32,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:32,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:32,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:32,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:32,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:32,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:32,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:32,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:33,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:33,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-03 09:16:33,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 09:16:33,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 09:16:33,194 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:33,194 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2018-10-03 09:16:33,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:33,341 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-10-03 09:16:33,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 09:16:33,342 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 09:16:33,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:33,342 INFO L225 Difference]: With dead ends: 31 [2018-10-03 09:16:33,342 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 09:16:33,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 6 [2018-10-03 09:16:33,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 09:16:33,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-10-03 09:16:33,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 09:16:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-10-03 09:16:33,347 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2018-10-03 09:16:33,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:33,347 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-10-03 09:16:33,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 09:16:33,348 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-10-03 09:16:33,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 09:16:33,348 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:33,348 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-03 09:16:33,349 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:33,349 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:33,349 INFO L82 PathProgramCache]: Analyzing trace with hash -256855911, now seen corresponding path program 2 times [2018-10-03 09:16:33,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:33,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:33,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:33,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:33,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:33,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:33,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:33,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:16:33,520 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:16:33,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:33,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:34,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:34,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-10-03 09:16:34,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 09:16:34,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 09:16:34,148 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:34,148 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 15 states. [2018-10-03 09:16:34,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:34,733 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2018-10-03 09:16:34,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 09:16:34,733 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2018-10-03 09:16:34,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:34,735 INFO L225 Difference]: With dead ends: 43 [2018-10-03 09:16:34,735 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 09:16:34,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 13 [2018-10-03 09:16:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 09:16:34,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-10-03 09:16:34,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 09:16:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-10-03 09:16:34,741 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2018-10-03 09:16:34,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:34,741 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-10-03 09:16:34,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 09:16:34,741 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-10-03 09:16:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-03 09:16:34,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:34,742 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-10-03 09:16:34,743 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:34,743 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:34,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1324912968, now seen corresponding path program 3 times [2018-10-03 09:16:34,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:34,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:34,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:34,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:34,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:35,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:35,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:35,055 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:16:35,072 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-03 09:16:35,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:35,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:35,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:35,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-10-03 09:16:35,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 09:16:35,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 09:16:35,217 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:35,218 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 14 states. [2018-10-03 09:16:35,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:35,541 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-10-03 09:16:35,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 09:16:35,548 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2018-10-03 09:16:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:35,549 INFO L225 Difference]: With dead ends: 49 [2018-10-03 09:16:35,549 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 09:16:35,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 8 [2018-10-03 09:16:35,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 09:16:35,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-03 09:16:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 09:16:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-03 09:16:35,555 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-10-03 09:16:35,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:35,556 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-03 09:16:35,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 09:16:35,556 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-03 09:16:35,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-03 09:16:35,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:35,557 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 09:16:35,557 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:35,557 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:35,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1588570591, now seen corresponding path program 4 times [2018-10-03 09:16:35,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:35,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:35,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:35,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:35,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:35,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:35,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:35,679 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:16:35,687 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:16:35,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:35,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:35,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:35,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-10-03 09:16:35,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 09:16:35,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 09:16:35,920 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:35,920 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-10-03 09:16:36,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:36,265 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2018-10-03 09:16:36,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 09:16:36,266 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-10-03 09:16:36,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:36,266 INFO L225 Difference]: With dead ends: 60 [2018-10-03 09:16:36,266 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 09:16:36,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.0s impTime 7 [2018-10-03 09:16:36,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 09:16:36,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2018-10-03 09:16:36,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 09:16:36,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-03 09:16:36,272 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-10-03 09:16:36,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:36,273 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-03 09:16:36,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 09:16:36,273 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-03 09:16:36,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 09:16:36,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:36,274 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 09:16:36,274 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:36,274 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:36,275 INFO L82 PathProgramCache]: Analyzing trace with hash 366737255, now seen corresponding path program 5 times [2018-10-03 09:16:36,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:36,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:36,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:36,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:36,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:36,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:36,680 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:36,692 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:16:36,711 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-03 09:16:36,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:36,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:37,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:37,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-10-03 09:16:37,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 09:16:37,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 09:16:37,260 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:37,263 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 17 states. [2018-10-03 09:16:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:37,831 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2018-10-03 09:16:37,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 09:16:37,831 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-10-03 09:16:37,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:37,833 INFO L225 Difference]: With dead ends: 64 [2018-10-03 09:16:37,833 INFO L226 Difference]: Without dead ends: 50 [2018-10-03 09:16:37,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.4s impTime 10 [2018-10-03 09:16:37,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-03 09:16:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2018-10-03 09:16:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 09:16:37,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-10-03 09:16:37,841 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2018-10-03 09:16:37,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:37,841 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-10-03 09:16:37,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 09:16:37,841 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-10-03 09:16:37,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 09:16:37,842 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:37,842 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-03 09:16:37,843 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:37,843 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:37,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1079885042, now seen corresponding path program 6 times [2018-10-03 09:16:37,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:37,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:37,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:37,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:37,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:37,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:37,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:37,986 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:16:38,005 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-03 09:16:38,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:38,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:38,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:38,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-10-03 09:16:38,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 09:16:38,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 09:16:38,311 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:38,311 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 17 states. [2018-10-03 09:16:38,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:38,540 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-10-03 09:16:38,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 09:16:38,541 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2018-10-03 09:16:38,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:38,542 INFO L225 Difference]: With dead ends: 75 [2018-10-03 09:16:38,542 INFO L226 Difference]: Without dead ends: 40 [2018-10-03 09:16:38,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 8 [2018-10-03 09:16:38,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-03 09:16:38,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2018-10-03 09:16:38,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-03 09:16:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-03 09:16:38,550 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2018-10-03 09:16:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:38,550 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-03 09:16:38,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 09:16:38,551 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-03 09:16:38,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-03 09:16:38,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:38,552 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-03 09:16:38,552 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:38,552 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:38,553 INFO L82 PathProgramCache]: Analyzing trace with hash -921359226, now seen corresponding path program 7 times [2018-10-03 09:16:38,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:38,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:38,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:38,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:38,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:38,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:38,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:38,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:38,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:39,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:39,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2018-10-03 09:16:39,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 09:16:39,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 09:16:39,285 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:39,285 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2018-10-03 09:16:39,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:39,959 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2018-10-03 09:16:39,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 09:16:39,960 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2018-10-03 09:16:39,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:39,961 INFO L225 Difference]: With dead ends: 79 [2018-10-03 09:16:39,961 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 09:16:39,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 14 [2018-10-03 09:16:39,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 09:16:39,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2018-10-03 09:16:39,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-03 09:16:39,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-03 09:16:39,971 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2018-10-03 09:16:39,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:39,971 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-03 09:16:39,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 09:16:39,972 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-03 09:16:39,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-03 09:16:39,973 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:39,973 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-03 09:16:39,973 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:39,973 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:39,973 INFO L82 PathProgramCache]: Analyzing trace with hash 451793069, now seen corresponding path program 8 times [2018-10-03 09:16:39,974 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:39,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:39,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:39,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:39,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:40,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:40,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:40,125 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:16:40,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:16:40,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:40,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:40,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:40,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-10-03 09:16:40,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 09:16:40,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 09:16:40,537 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:40,538 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2018-10-03 09:16:40,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:40,745 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2018-10-03 09:16:40,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 09:16:40,747 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2018-10-03 09:16:40,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:40,748 INFO L225 Difference]: With dead ends: 90 [2018-10-03 09:16:40,748 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 09:16:40,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime 9 [2018-10-03 09:16:40,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 09:16:40,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-10-03 09:16:40,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 09:16:40,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-10-03 09:16:40,755 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2018-10-03 09:16:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:40,755 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-10-03 09:16:40,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 09:16:40,756 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-10-03 09:16:40,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 09:16:40,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:40,757 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-03 09:16:40,757 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:40,757 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:40,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1868574667, now seen corresponding path program 9 times [2018-10-03 09:16:40,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:40,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:40,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:40,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:40,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 5 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:41,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:41,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:41,249 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:16:41,266 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-03 09:16:41,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:41,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 50 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:41,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:41,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2018-10-03 09:16:41,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 09:16:41,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 09:16:41,696 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:41,696 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 31 states. [2018-10-03 09:16:43,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:43,771 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-10-03 09:16:43,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 09:16:43,772 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2018-10-03 09:16:43,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:43,773 INFO L225 Difference]: With dead ends: 116 [2018-10-03 09:16:43,774 INFO L226 Difference]: Without dead ends: 69 [2018-10-03 09:16:43,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.3s impTime 20 [2018-10-03 09:16:43,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-03 09:16:43,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2018-10-03 09:16:43,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-03 09:16:43,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-03 09:16:43,784 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 44 [2018-10-03 09:16:43,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:43,785 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-03 09:16:43,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 09:16:43,785 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-03 09:16:43,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-03 09:16:43,786 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:43,786 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-10-03 09:16:43,786 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:43,786 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:43,786 INFO L82 PathProgramCache]: Analyzing trace with hash 2089942100, now seen corresponding path program 10 times [2018-10-03 09:16:43,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:43,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:43,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:43,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:43,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:44,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:44,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:44,075 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:16:44,087 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:16:44,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:44,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:44,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:44,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2018-10-03 09:16:44,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 09:16:44,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 09:16:44,377 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:44,377 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-10-03 09:16:45,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:45,503 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2018-10-03 09:16:45,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 09:16:45,503 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-10-03 09:16:45,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:45,504 INFO L225 Difference]: With dead ends: 109 [2018-10-03 09:16:45,504 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 09:16:45,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 16 [2018-10-03 09:16:45,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 09:16:45,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2018-10-03 09:16:45,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-03 09:16:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-03 09:16:45,515 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2018-10-03 09:16:45,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:45,515 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-03 09:16:45,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 09:16:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-03 09:16:45,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-03 09:16:45,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:45,517 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-03 09:16:45,517 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:45,517 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:45,517 INFO L82 PathProgramCache]: Analyzing trace with hash 549587323, now seen corresponding path program 11 times [2018-10-03 09:16:45,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:45,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:45,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:45,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:45,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:45,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:45,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:45,842 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:16:45,862 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 09:16:45,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:45,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:46,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:46,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-10-03 09:16:46,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 09:16:46,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 09:16:46,178 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:46,178 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 26 states. [2018-10-03 09:16:46,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:46,488 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2018-10-03 09:16:46,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 09:16:46,488 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2018-10-03 09:16:46,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:46,489 INFO L225 Difference]: With dead ends: 120 [2018-10-03 09:16:46,490 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 09:16:46,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 11 [2018-10-03 09:16:46,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 09:16:46,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-10-03 09:16:46,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 09:16:46,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-10-03 09:16:46,500 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2018-10-03 09:16:46,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:46,501 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-10-03 09:16:46,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 09:16:46,501 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-10-03 09:16:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 09:16:46,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:46,502 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-03 09:16:46,502 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:46,502 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:46,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1743111421, now seen corresponding path program 12 times [2018-10-03 09:16:46,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:46,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:46,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:46,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:46,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:47,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:47,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:47,200 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:16:47,219 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 09:16:47,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:47,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:47,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:47,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 28 [2018-10-03 09:16:47,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 09:16:47,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 09:16:47,610 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:47,610 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 29 states. [2018-10-03 09:16:49,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:49,123 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2018-10-03 09:16:49,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 09:16:49,124 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2018-10-03 09:16:49,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:49,125 INFO L225 Difference]: With dead ends: 124 [2018-10-03 09:16:49,125 INFO L226 Difference]: Without dead ends: 94 [2018-10-03 09:16:49,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 18 [2018-10-03 09:16:49,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-03 09:16:49,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2018-10-03 09:16:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 09:16:49,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-10-03 09:16:49,139 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2018-10-03 09:16:49,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:49,139 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-10-03 09:16:49,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 09:16:49,139 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-10-03 09:16:49,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 09:16:49,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:49,140 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-03 09:16:49,140 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:49,141 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:49,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1415751510, now seen corresponding path program 13 times [2018-10-03 09:16:49,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:49,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:49,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:49,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:49,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:49,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:49,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:49,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:49,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:49,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:49,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-10-03 09:16:49,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 09:16:49,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 09:16:49,616 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:49,616 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 29 states. [2018-10-03 09:16:50,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:50,066 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-10-03 09:16:50,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 09:16:50,069 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2018-10-03 09:16:50,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:50,070 INFO L225 Difference]: With dead ends: 135 [2018-10-03 09:16:50,070 INFO L226 Difference]: Without dead ends: 68 [2018-10-03 09:16:50,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 12 [2018-10-03 09:16:50,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-03 09:16:50,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2018-10-03 09:16:50,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-03 09:16:50,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-03 09:16:50,083 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-10-03 09:16:50,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:50,083 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-03 09:16:50,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 09:16:50,083 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-03 09:16:50,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-03 09:16:50,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:50,084 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-03 09:16:50,085 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:50,085 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:50,085 INFO L82 PathProgramCache]: Analyzing trace with hash 175889954, now seen corresponding path program 14 times [2018-10-03 09:16:50,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:50,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:50,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:50,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:50,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:50,582 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 8 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:50,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:50,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:50,600 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:16:50,617 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:16:50,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:50,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 128 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:51,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:51,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 42 [2018-10-03 09:16:51,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 09:16:51,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 09:16:51,204 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:51,204 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 43 states. [2018-10-03 09:16:53,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:53,862 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-10-03 09:16:53,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 09:16:53,862 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 65 [2018-10-03 09:16:53,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:53,864 INFO L225 Difference]: With dead ends: 173 [2018-10-03 09:16:53,864 INFO L226 Difference]: Without dead ends: 102 [2018-10-03 09:16:53,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.1s impTime 29 [2018-10-03 09:16:53,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-03 09:16:53,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2018-10-03 09:16:53,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-03 09:16:53,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-03 09:16:53,876 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 65 [2018-10-03 09:16:53,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:53,876 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-03 09:16:53,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 09:16:53,877 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-03 09:16:53,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-03 09:16:53,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:53,878 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-10-03 09:16:53,878 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:53,878 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:53,878 INFO L82 PathProgramCache]: Analyzing trace with hash 2036938705, now seen corresponding path program 15 times [2018-10-03 09:16:53,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:53,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:53,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:53,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:53,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 9 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:54,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:54,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:54,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:16:54,650 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-03 09:16:54,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:54,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 162 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:55,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:55,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2018-10-03 09:16:55,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 09:16:55,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 09:16:55,271 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:55,271 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 47 states. [2018-10-03 09:16:58,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:58,342 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2018-10-03 09:16:58,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 09:16:58,343 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2018-10-03 09:16:58,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:58,344 INFO L225 Difference]: With dead ends: 192 [2018-10-03 09:16:58,344 INFO L226 Difference]: Without dead ends: 113 [2018-10-03 09:16:58,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.4s impTime 31 [2018-10-03 09:16:58,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-03 09:16:58,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2018-10-03 09:16:58,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-03 09:16:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-03 09:16:58,354 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 72 [2018-10-03 09:16:58,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:58,354 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-03 09:16:58,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 09:16:58,354 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-03 09:16:58,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-03 09:16:58,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:58,355 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-10-03 09:16:58,355 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:58,355 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:58,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1070649840, now seen corresponding path program 16 times [2018-10-03 09:16:58,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:58,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:58,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:58,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:58,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:58,897 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:58,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:58,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:58,905 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:16:58,919 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:16:58,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:58,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:59,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:59,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2018-10-03 09:16:59,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 09:16:59,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 09:16:59,308 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:59,308 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 38 states. [2018-10-03 09:17:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:02,636 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2018-10-03 09:17:02,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 09:17:02,636 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 79 [2018-10-03 09:17:02,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:02,637 INFO L225 Difference]: With dead ends: 169 [2018-10-03 09:17:02,637 INFO L226 Difference]: Without dead ends: 127 [2018-10-03 09:17:02,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.7s impTime 25 [2018-10-03 09:17:02,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-03 09:17:02,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2018-10-03 09:17:02,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-03 09:17:02,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-10-03 09:17:02,651 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2018-10-03 09:17:02,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:02,651 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-10-03 09:17:02,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 09:17:02,651 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-10-03 09:17:02,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-03 09:17:02,652 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:02,652 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-03 09:17:02,652 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:02,652 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:02,652 INFO L82 PathProgramCache]: Analyzing trace with hash -685461225, now seen corresponding path program 17 times [2018-10-03 09:17:02,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:02,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:02,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:02,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:02,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:03,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:03,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:03,021 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:17:03,041 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-03 09:17:03,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:03,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:03,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:03,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-10-03 09:17:03,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 09:17:03,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 09:17:03,354 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:03,354 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 38 states. [2018-10-03 09:17:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:03,943 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2018-10-03 09:17:03,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 09:17:03,944 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2018-10-03 09:17:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:03,945 INFO L225 Difference]: With dead ends: 180 [2018-10-03 09:17:03,945 INFO L226 Difference]: Without dead ends: 89 [2018-10-03 09:17:03,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 15 [2018-10-03 09:17:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-03 09:17:03,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2018-10-03 09:17:03,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-03 09:17:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-10-03 09:17:03,957 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2018-10-03 09:17:03,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:03,957 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-10-03 09:17:03,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 09:17:03,957 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-10-03 09:17:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-03 09:17:03,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:03,958 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-03 09:17:03,958 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:03,958 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:03,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1750415713, now seen corresponding path program 18 times [2018-10-03 09:17:03,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:03,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:03,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:03,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:03,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:04,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:04,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:04,553 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:17:04,582 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 09:17:04,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:04,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:05,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:05,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 40 [2018-10-03 09:17:05,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 09:17:05,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 09:17:05,050 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:05,050 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 41 states. [2018-10-03 09:17:08,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:08,476 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2018-10-03 09:17:08,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 09:17:08,479 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2018-10-03 09:17:08,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:08,481 INFO L225 Difference]: With dead ends: 184 [2018-10-03 09:17:08,481 INFO L226 Difference]: Without dead ends: 138 [2018-10-03 09:17:08,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.3s impTime 26 [2018-10-03 09:17:08,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-03 09:17:08,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 91. [2018-10-03 09:17:08,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-03 09:17:08,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-03 09:17:08,494 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-10-03 09:17:08,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:08,495 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-03 09:17:08,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 09:17:08,495 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-03 09:17:08,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-03 09:17:08,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:08,496 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-03 09:17:08,496 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:08,496 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:08,496 INFO L82 PathProgramCache]: Analyzing trace with hash 310818374, now seen corresponding path program 19 times [2018-10-03 09:17:08,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:08,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:08,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:08,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:08,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:09,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:09,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:09,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:09,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:10,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:10,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-10-03 09:17:10,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 09:17:10,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 09:17:10,111 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:10,111 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 41 states. [2018-10-03 09:17:10,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:10,695 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-10-03 09:17:10,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 09:17:10,696 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2018-10-03 09:17:10,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:10,697 INFO L225 Difference]: With dead ends: 195 [2018-10-03 09:17:10,697 INFO L226 Difference]: Without dead ends: 96 [2018-10-03 09:17:10,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.1s impTime 16 [2018-10-03 09:17:10,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-03 09:17:10,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2018-10-03 09:17:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-03 09:17:10,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-03 09:17:10,710 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 90 [2018-10-03 09:17:10,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:10,710 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-03 09:17:10,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 09:17:10,710 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-03 09:17:10,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-03 09:17:10,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:10,711 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-03 09:17:10,711 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:10,712 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:10,712 INFO L82 PathProgramCache]: Analyzing trace with hash 2005850046, now seen corresponding path program 20 times [2018-10-03 09:17:10,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:10,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:10,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:10,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:10,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 12 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:12,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:12,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:12,087 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:17:12,111 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:17:12,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:12,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 288 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:13,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:13,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 58 [2018-10-03 09:17:13,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 09:17:13,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 09:17:13,247 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:13,247 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 59 states. [2018-10-03 09:17:18,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:18,029 INFO L93 Difference]: Finished difference Result 249 states and 255 transitions. [2018-10-03 09:17:18,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-03 09:17:18,030 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 93 [2018-10-03 09:17:18,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:18,031 INFO L225 Difference]: With dead ends: 249 [2018-10-03 09:17:18,031 INFO L226 Difference]: Without dead ends: 146 [2018-10-03 09:17:18,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s Time 4.5s impTime 40 [2018-10-03 09:17:18,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-03 09:17:18,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2018-10-03 09:17:18,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-03 09:17:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-03 09:17:18,048 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 93 [2018-10-03 09:17:18,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:18,048 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-03 09:17:18,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 09:17:18,049 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-03 09:17:18,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-03 09:17:18,049 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:18,050 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-10-03 09:17:18,050 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:18,050 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:18,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1811736429, now seen corresponding path program 21 times [2018-10-03 09:17:18,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:18,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:18,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:18,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:18,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:18,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:18,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:18,750 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:17:18,780 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-03 09:17:18,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:18,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:19,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:19,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 46 [2018-10-03 09:17:19,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 09:17:19,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 09:17:19,504 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:19,504 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 47 states. [2018-10-03 09:17:23,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:23,367 INFO L93 Difference]: Finished difference Result 214 states and 219 transitions. [2018-10-03 09:17:23,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 09:17:23,367 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2018-10-03 09:17:23,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:23,368 INFO L225 Difference]: With dead ends: 214 [2018-10-03 09:17:23,368 INFO L226 Difference]: Without dead ends: 160 [2018-10-03 09:17:23,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.1s impTime 30 [2018-10-03 09:17:23,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-03 09:17:23,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2018-10-03 09:17:23,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-03 09:17:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-10-03 09:17:23,386 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2018-10-03 09:17:23,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:23,387 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-10-03 09:17:23,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 09:17:23,387 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-10-03 09:17:23,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-03 09:17:23,387 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:23,387 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-03 09:17:23,388 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:23,388 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:23,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1008713748, now seen corresponding path program 22 times [2018-10-03 09:17:23,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:23,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:23,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:23,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:23,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:23,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:23,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:23,877 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:17:23,896 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:17:23,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:23,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:24,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:24,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2018-10-03 09:17:24,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 09:17:24,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 09:17:24,318 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:24,318 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-10-03 09:17:25,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:25,104 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-10-03 09:17:25,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 09:17:25,104 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-10-03 09:17:25,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:25,105 INFO L225 Difference]: With dead ends: 225 [2018-10-03 09:17:25,105 INFO L226 Difference]: Without dead ends: 110 [2018-10-03 09:17:25,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 18 [2018-10-03 09:17:25,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-03 09:17:25,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2018-10-03 09:17:25,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-03 09:17:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-10-03 09:17:25,123 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 104 [2018-10-03 09:17:25,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:25,123 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-10-03 09:17:25,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 09:17:25,123 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-10-03 09:17:25,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-03 09:17:25,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:25,124 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-03 09:17:25,124 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:25,124 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:25,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1699483764, now seen corresponding path program 23 times [2018-10-03 09:17:25,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:25,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:25,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:25,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:25,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:25,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:25,921 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:25,928 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:17:25,954 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-03 09:17:25,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:25,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:26,523 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:26,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:26,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 49 [2018-10-03 09:17:26,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 09:17:26,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 09:17:26,544 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:26,544 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 50 states. [2018-10-03 09:17:30,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:30,256 INFO L93 Difference]: Finished difference Result 229 states and 234 transitions. [2018-10-03 09:17:30,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 09:17:30,263 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2018-10-03 09:17:30,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:30,264 INFO L225 Difference]: With dead ends: 229 [2018-10-03 09:17:30,264 INFO L226 Difference]: Without dead ends: 171 [2018-10-03 09:17:30,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.1s impTime 32 [2018-10-03 09:17:30,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-03 09:17:30,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 112. [2018-10-03 09:17:30,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-03 09:17:30,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-03 09:17:30,286 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-10-03 09:17:30,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:30,286 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-03 09:17:30,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 09:17:30,286 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-03 09:17:30,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-03 09:17:30,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:30,287 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-03 09:17:30,287 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:30,287 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:30,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1446534989, now seen corresponding path program 24 times [2018-10-03 09:17:30,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:30,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:30,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:30,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:30,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:30,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:30,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:30,805 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:17:30,832 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-03 09:17:30,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:30,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:31,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:31,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2018-10-03 09:17:31,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 09:17:31,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 09:17:31,248 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:31,248 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 50 states. [2018-10-03 09:17:32,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:32,809 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2018-10-03 09:17:32,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 09:17:32,809 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 111 [2018-10-03 09:17:32,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:32,811 INFO L225 Difference]: With dead ends: 240 [2018-10-03 09:17:32,811 INFO L226 Difference]: Without dead ends: 117 [2018-10-03 09:17:32,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime 19 [2018-10-03 09:17:32,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-03 09:17:32,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2018-10-03 09:17:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-03 09:17:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-03 09:17:32,827 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 111 [2018-10-03 09:17:32,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:32,827 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-03 09:17:32,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 09:17:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-03 09:17:32,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-03 09:17:32,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:32,828 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-03 09:17:32,828 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:32,828 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:32,828 INFO L82 PathProgramCache]: Analyzing trace with hash -2055366085, now seen corresponding path program 25 times [2018-10-03 09:17:32,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:32,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:32,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:32,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:32,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:33,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:33,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:33,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:33,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:34,918 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:34,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:34,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 52 [2018-10-03 09:17:34,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 09:17:34,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 09:17:34,939 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:34,939 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 53 states. [2018-10-03 09:17:39,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:39,218 INFO L93 Difference]: Finished difference Result 244 states and 249 transitions. [2018-10-03 09:17:39,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 09:17:39,218 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2018-10-03 09:17:39,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:39,219 INFO L225 Difference]: With dead ends: 244 [2018-10-03 09:17:39,219 INFO L226 Difference]: Without dead ends: 182 [2018-10-03 09:17:39,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 3.0s impTime 34 [2018-10-03 09:17:39,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-03 09:17:39,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 119. [2018-10-03 09:17:39,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-03 09:17:39,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-10-03 09:17:39,241 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2018-10-03 09:17:39,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:39,241 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-10-03 09:17:39,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 09:17:39,242 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-10-03 09:17:39,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-03 09:17:39,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:39,242 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-03 09:17:39,243 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:39,243 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:39,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1833851874, now seen corresponding path program 26 times [2018-10-03 09:17:39,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:39,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:39,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:39,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:39,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:39,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:39,717 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:39,727 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:17:39,753 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:17:39,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:39,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:40,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:40,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-10-03 09:17:40,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 09:17:40,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 09:17:40,223 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:40,223 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 53 states. [2018-10-03 09:17:41,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:41,292 INFO L93 Difference]: Finished difference Result 255 states and 259 transitions. [2018-10-03 09:17:41,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 09:17:41,294 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 118 [2018-10-03 09:17:41,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:41,295 INFO L225 Difference]: With dead ends: 255 [2018-10-03 09:17:41,295 INFO L226 Difference]: Without dead ends: 124 [2018-10-03 09:17:41,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime 20 [2018-10-03 09:17:41,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-03 09:17:41,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2018-10-03 09:17:41,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-03 09:17:41,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-10-03 09:17:41,312 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 118 [2018-10-03 09:17:41,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:41,313 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-10-03 09:17:41,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 09:17:41,313 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-10-03 09:17:41,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-03 09:17:41,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:41,313 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-03 09:17:41,314 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:41,314 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:41,314 INFO L82 PathProgramCache]: Analyzing trace with hash 540940634, now seen corresponding path program 27 times [2018-10-03 09:17:41,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:41,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:41,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:41,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:41,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 16 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:42,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:42,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:42,677 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:17:42,710 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-03 09:17:42,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:42,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 512 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:44,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:44,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 74 [2018-10-03 09:17:44,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-03 09:17:44,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-03 09:17:44,292 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:44,292 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 75 states. [2018-10-03 09:17:50,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:50,589 INFO L93 Difference]: Finished difference Result 325 states and 331 transitions. [2018-10-03 09:17:50,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-03 09:17:50,591 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 121 [2018-10-03 09:17:50,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:50,593 INFO L225 Difference]: With dead ends: 325 [2018-10-03 09:17:50,593 INFO L226 Difference]: Without dead ends: 190 [2018-10-03 09:17:50,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4s Time 5.5s impTime 53 [2018-10-03 09:17:50,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-03 09:17:50,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 129. [2018-10-03 09:17:50,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-03 09:17:50,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-10-03 09:17:50,620 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 121 [2018-10-03 09:17:50,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:50,620 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-10-03 09:17:50,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-03 09:17:50,620 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-10-03 09:17:50,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-03 09:17:50,621 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:50,621 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-10-03 09:17:50,622 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:50,622 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:50,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1991581943, now seen corresponding path program 28 times [2018-10-03 09:17:50,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:50,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:50,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:50,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:50,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:52,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:52,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:52,450 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:17:52,471 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:17:52,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:52,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:53,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:53,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 58 [2018-10-03 09:17:53,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 09:17:53,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 09:17:53,294 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:53,294 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-10-03 09:17:59,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:59,775 INFO L93 Difference]: Finished difference Result 274 states and 279 transitions. [2018-10-03 09:17:59,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-03 09:17:59,775 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-10-03 09:17:59,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:59,776 INFO L225 Difference]: With dead ends: 274 [2018-10-03 09:17:59,777 INFO L226 Difference]: Without dead ends: 204 [2018-10-03 09:17:59,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s Time 4.3s impTime 38 [2018-10-03 09:17:59,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-03 09:17:59,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2018-10-03 09:17:59,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-03 09:17:59,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-10-03 09:17:59,808 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-10-03 09:17:59,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:59,808 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-10-03 09:17:59,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 09:17:59,808 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-10-03 09:17:59,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-03 09:17:59,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:59,809 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-03 09:17:59,810 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:59,810 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:59,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1942976080, now seen corresponding path program 29 times [2018-10-03 09:17:59,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:59,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:59,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:59,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:59,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:00,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:00,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:00,776 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:18:00,814 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-03 09:18:00,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:00,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:01,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:01,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2018-10-03 09:18:01,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 09:18:01,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 09:18:01,806 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:01,807 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 59 states. [2018-10-03 09:18:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:02,946 INFO L93 Difference]: Finished difference Result 285 states and 289 transitions. [2018-10-03 09:18:02,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 09:18:02,946 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 132 [2018-10-03 09:18:02,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:02,947 INFO L225 Difference]: With dead ends: 285 [2018-10-03 09:18:02,947 INFO L226 Difference]: Without dead ends: 138 [2018-10-03 09:18:02,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.5s impTime 22 [2018-10-03 09:18:02,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-03 09:18:02,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2018-10-03 09:18:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-03 09:18:02,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-03 09:18:02,970 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-10-03 09:18:02,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:02,970 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-03 09:18:02,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 09:18:02,970 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-03 09:18:02,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-03 09:18:02,971 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:02,971 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-03 09:18:02,971 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:02,971 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:02,971 INFO L82 PathProgramCache]: Analyzing trace with hash 220943656, now seen corresponding path program 30 times [2018-10-03 09:18:02,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:02,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:02,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:02,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:02,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 18 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:05,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:05,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:05,144 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:18:05,180 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-03 09:18:05,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:05,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 648 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:06,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:06,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 82 [2018-10-03 09:18:06,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 09:18:06,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 09:18:06,888 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:06,888 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 83 states. [2018-10-03 09:18:15,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:15,616 INFO L93 Difference]: Finished difference Result 363 states and 369 transitions. [2018-10-03 09:18:15,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-10-03 09:18:15,617 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 135 [2018-10-03 09:18:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:15,619 INFO L225 Difference]: With dead ends: 363 [2018-10-03 09:18:15,619 INFO L226 Difference]: Without dead ends: 212 [2018-10-03 09:18:15,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9s Time 7.8s impTime 58 [2018-10-03 09:18:15,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-10-03 09:18:15,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 143. [2018-10-03 09:18:15,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-03 09:18:15,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-10-03 09:18:15,649 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 135 [2018-10-03 09:18:15,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:15,649 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-10-03 09:18:15,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 09:18:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-10-03 09:18:15,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-03 09:18:15,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:15,650 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-10-03 09:18:15,650 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:15,650 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:15,650 INFO L82 PathProgramCache]: Analyzing trace with hash 847427031, now seen corresponding path program 31 times [2018-10-03 09:18:15,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:15,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:15,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:15,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:15,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:17,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:17,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:17,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:17,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:18,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:18,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 64 [2018-10-03 09:18:18,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 09:18:18,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 09:18:18,139 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:18,139 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 65 states. [2018-10-03 09:18:24,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:24,843 INFO L93 Difference]: Finished difference Result 304 states and 309 transitions. [2018-10-03 09:18:24,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-03 09:18:24,843 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 142 [2018-10-03 09:18:24,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:24,844 INFO L225 Difference]: With dead ends: 304 [2018-10-03 09:18:24,844 INFO L226 Difference]: Without dead ends: 226 [2018-10-03 09:18:24,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s Time 4.2s impTime 43 [2018-10-03 09:18:24,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-03 09:18:24,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 147. [2018-10-03 09:18:24,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-03 09:18:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2018-10-03 09:18:24,876 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 142 [2018-10-03 09:18:24,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:24,876 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2018-10-03 09:18:24,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 09:18:24,876 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2018-10-03 09:18:24,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-03 09:18:24,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:24,877 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-03 09:18:24,877 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:24,878 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:24,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1796978306, now seen corresponding path program 32 times [2018-10-03 09:18:24,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:24,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:24,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:24,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:24,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 820 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:25,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:25,717 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:25,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:18:25,758 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:18:25,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:25,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 820 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:26,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:26,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-10-03 09:18:26,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 09:18:26,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 09:18:26,532 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:26,532 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 65 states. [2018-10-03 09:18:27,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:27,927 INFO L93 Difference]: Finished difference Result 315 states and 319 transitions. [2018-10-03 09:18:27,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 09:18:27,927 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 146 [2018-10-03 09:18:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:27,928 INFO L225 Difference]: With dead ends: 315 [2018-10-03 09:18:27,928 INFO L226 Difference]: Without dead ends: 152 [2018-10-03 09:18:27,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime 24 [2018-10-03 09:18:27,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-03 09:18:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2018-10-03 09:18:27,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-03 09:18:27,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-10-03 09:18:27,958 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 146 [2018-10-03 09:18:27,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:27,959 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-10-03 09:18:27,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 09:18:27,959 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-10-03 09:18:27,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-03 09:18:27,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:27,960 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-03 09:18:27,960 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:27,960 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:27,960 INFO L82 PathProgramCache]: Analyzing trace with hash -193355018, now seen corresponding path program 33 times [2018-10-03 09:18:27,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:27,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:27,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:27,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:27,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 20 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:29,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:29,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:29,585 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:18:29,644 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-03 09:18:29,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:29,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 800 proven. 671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:31,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:31,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46] total 90 [2018-10-03 09:18:31,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-03 09:18:31,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-03 09:18:31,624 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:31,624 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 91 states. [2018-10-03 09:18:41,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:41,500 INFO L93 Difference]: Finished difference Result 401 states and 407 transitions. [2018-10-03 09:18:41,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-10-03 09:18:41,500 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 149 [2018-10-03 09:18:41,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:41,502 INFO L225 Difference]: With dead ends: 401 [2018-10-03 09:18:41,502 INFO L226 Difference]: Without dead ends: 234 [2018-10-03 09:18:41,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3s Time 8.3s impTime 64 [2018-10-03 09:18:41,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-03 09:18:41,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 157. [2018-10-03 09:18:41,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-03 09:18:41,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-10-03 09:18:41,539 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 149 [2018-10-03 09:18:41,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:41,540 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-10-03 09:18:41,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-03 09:18:41,540 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-10-03 09:18:41,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-03 09:18:41,541 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:41,541 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1] [2018-10-03 09:18:41,541 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:41,541 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:41,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1380130469, now seen corresponding path program 34 times [2018-10-03 09:18:41,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:41,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:41,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:41,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:41,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 21 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:43,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:43,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:43,848 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:18:43,876 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:18:43,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:43,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 21 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:45,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:45,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 70 [2018-10-03 09:18:45,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 09:18:45,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 09:18:45,191 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:45,191 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 71 states. [2018-10-03 09:18:53,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:53,577 INFO L93 Difference]: Finished difference Result 334 states and 339 transitions. [2018-10-03 09:18:53,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-03 09:18:53,577 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 156 [2018-10-03 09:18:53,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:53,578 INFO L225 Difference]: With dead ends: 334 [2018-10-03 09:18:53,578 INFO L226 Difference]: Without dead ends: 248 [2018-10-03 09:18:53,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8s Time 5.9s impTime 46 [2018-10-03 09:18:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-10-03 09:18:53,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 161. [2018-10-03 09:18:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-03 09:18:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-10-03 09:18:53,620 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 156 [2018-10-03 09:18:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:53,621 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-10-03 09:18:53,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 09:18:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-10-03 09:18:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-03 09:18:53,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:53,622 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-03 09:18:53,622 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:53,622 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:53,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1719166132, now seen corresponding path program 35 times [2018-10-03 09:18:53,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:53,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:53,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:53,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:53,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 990 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:54,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:54,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:54,924 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:18:54,978 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-10-03 09:18:54,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:54,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 990 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:56,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:56,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2018-10-03 09:18:56,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 09:18:56,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 09:18:56,670 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:56,670 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 71 states. [2018-10-03 09:18:58,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:58,331 INFO L93 Difference]: Finished difference Result 345 states and 349 transitions. [2018-10-03 09:18:58,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 09:18:58,331 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 160 [2018-10-03 09:18:58,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:58,333 INFO L225 Difference]: With dead ends: 345 [2018-10-03 09:18:58,333 INFO L226 Difference]: Without dead ends: 166 [2018-10-03 09:18:58,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 1.8s impTime 26 [2018-10-03 09:18:58,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-03 09:18:58,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2018-10-03 09:18:58,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-03 09:18:58,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-10-03 09:18:58,368 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 160 [2018-10-03 09:18:58,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:58,368 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-10-03 09:18:58,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 09:18:58,368 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-10-03 09:18:58,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-03 09:18:58,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:58,369 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-03 09:18:58,369 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:58,369 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:58,369 INFO L82 PathProgramCache]: Analyzing trace with hash -148438332, now seen corresponding path program 36 times [2018-10-03 09:18:58,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:58,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:58,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:58,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:58,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 22 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:00,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:00,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:00,079 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:19:00,123 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-03 09:19:00,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:00,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 22 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:01,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:01,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 73 [2018-10-03 09:19:01,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 09:19:01,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 09:19:01,357 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:01,358 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 74 states. [2018-10-03 09:19:10,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:10,939 INFO L93 Difference]: Finished difference Result 349 states and 354 transitions. [2018-10-03 09:19:10,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-03 09:19:10,940 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 163 [2018-10-03 09:19:10,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:10,941 INFO L225 Difference]: With dead ends: 349 [2018-10-03 09:19:10,941 INFO L226 Difference]: Without dead ends: 259 [2018-10-03 09:19:10,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4s Time 5.8s impTime 48 [2018-10-03 09:19:10,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-03 09:19:10,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 168. [2018-10-03 09:19:10,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-03 09:19:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2018-10-03 09:19:10,974 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 163 [2018-10-03 09:19:10,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:10,975 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2018-10-03 09:19:10,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 09:19:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2018-10-03 09:19:10,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-03 09:19:10,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:10,976 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-03 09:19:10,976 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:10,976 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:10,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1550952469, now seen corresponding path program 37 times [2018-10-03 09:19:10,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:10,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:10,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:10,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:10,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 1081 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:11,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:11,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:11,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:19:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:11,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 1081 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:12,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:12,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2018-10-03 09:19:12,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 09:19:12,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 09:19:12,692 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:12,692 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 74 states. [2018-10-03 09:19:14,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:14,405 INFO L93 Difference]: Finished difference Result 360 states and 364 transitions. [2018-10-03 09:19:14,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 09:19:14,406 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 167 [2018-10-03 09:19:14,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:14,407 INFO L225 Difference]: With dead ends: 360 [2018-10-03 09:19:14,408 INFO L226 Difference]: Without dead ends: 173 [2018-10-03 09:19:14,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.4s impTime 27 [2018-10-03 09:19:14,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-03 09:19:14,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2018-10-03 09:19:14,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-03 09:19:14,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-10-03 09:19:14,444 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2018-10-03 09:19:14,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:14,444 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-10-03 09:19:14,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 09:19:14,445 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-10-03 09:19:14,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-03 09:19:14,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:14,446 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-03 09:19:14,446 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:14,446 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:14,446 INFO L82 PathProgramCache]: Analyzing trace with hash -810935949, now seen corresponding path program 38 times [2018-10-03 09:19:14,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:14,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:14,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:14,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:19:14,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 23 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:16,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:16,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:16,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:19:16,729 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:19:16,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:16,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 23 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:18,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:18,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 76 [2018-10-03 09:19:18,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 09:19:18,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 09:19:18,192 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:18,192 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 77 states. [2018-10-03 09:19:29,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:29,734 INFO L93 Difference]: Finished difference Result 364 states and 369 transitions. [2018-10-03 09:19:29,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-03 09:19:29,735 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 170 [2018-10-03 09:19:29,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:29,736 INFO L225 Difference]: With dead ends: 364 [2018-10-03 09:19:29,736 INFO L226 Difference]: Without dead ends: 270 [2018-10-03 09:19:29,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3s Time 7.3s impTime 51 [2018-10-03 09:19:29,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-10-03 09:19:29,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 175. [2018-10-03 09:19:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-03 09:19:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-10-03 09:19:29,770 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-10-03 09:19:29,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:29,770 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-10-03 09:19:29,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 09:19:29,771 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-10-03 09:19:29,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-03 09:19:29,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:29,772 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-03 09:19:29,772 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:29,772 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:29,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1036484838, now seen corresponding path program 39 times [2018-10-03 09:19:29,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:29,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:29,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:29,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:29,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 1176 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:31,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:31,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:31,831 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:19:31,879 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-03 09:19:31,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:31,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 1176 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:32,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:32,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-10-03 09:19:32,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 09:19:32,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 09:19:32,666 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:32,667 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 77 states. [2018-10-03 09:19:34,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:34,551 INFO L93 Difference]: Finished difference Result 375 states and 379 transitions. [2018-10-03 09:19:34,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 09:19:34,551 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 174 [2018-10-03 09:19:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:34,552 INFO L225 Difference]: With dead ends: 375 [2018-10-03 09:19:34,552 INFO L226 Difference]: Without dead ends: 180 [2018-10-03 09:19:34,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.4s impTime 28 [2018-10-03 09:19:34,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-03 09:19:34,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2018-10-03 09:19:34,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-03 09:19:34,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-10-03 09:19:34,588 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 174 [2018-10-03 09:19:34,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:34,588 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-10-03 09:19:34,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 09:19:34,588 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-10-03 09:19:34,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-03 09:19:34,589 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:34,589 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-03 09:19:34,589 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:34,589 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:34,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1003391854, now seen corresponding path program 40 times [2018-10-03 09:19:34,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:34,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:34,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:34,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:34,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 24 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:37,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:37,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:37,984 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:19:38,016 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:19:38,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:38,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:39,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 24 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:39,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:39,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 79 [2018-10-03 09:19:39,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 09:19:39,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 09:19:39,410 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:39,410 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 80 states. [2018-10-03 09:19:52,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:52,231 INFO L93 Difference]: Finished difference Result 379 states and 384 transitions. [2018-10-03 09:19:52,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-03 09:19:52,231 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 177 [2018-10-03 09:19:52,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:52,233 INFO L225 Difference]: With dead ends: 379 [2018-10-03 09:19:52,233 INFO L226 Difference]: Without dead ends: 281 [2018-10-03 09:19:52,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1s Time 9.1s impTime 53 [2018-10-03 09:19:52,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-10-03 09:19:52,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 182. [2018-10-03 09:19:52,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-03 09:19:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-10-03 09:19:52,270 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 177 [2018-10-03 09:19:52,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:52,270 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-10-03 09:19:52,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 09:19:52,270 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-10-03 09:19:52,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-03 09:19:52,271 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:52,271 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-03 09:19:52,271 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:52,271 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:52,272 INFO L82 PathProgramCache]: Analyzing trace with hash 525284025, now seen corresponding path program 41 times [2018-10-03 09:19:52,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:52,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:52,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:52,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:52,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 1275 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:53,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:53,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:53,266 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:19:53,313 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-03 09:19:53,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:53,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 1275 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:54,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:54,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2018-10-03 09:19:54,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 09:19:54,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 09:19:54,163 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:54,163 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 80 states. [2018-10-03 09:19:56,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:56,188 INFO L93 Difference]: Finished difference Result 390 states and 394 transitions. [2018-10-03 09:19:56,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 09:19:56,188 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 181 [2018-10-03 09:19:56,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:56,189 INFO L225 Difference]: With dead ends: 390 [2018-10-03 09:19:56,189 INFO L226 Difference]: Without dead ends: 187 [2018-10-03 09:19:56,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.7s impTime 30 [2018-10-03 09:19:56,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-03 09:19:56,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2018-10-03 09:19:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-03 09:19:56,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-10-03 09:19:56,238 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 181 [2018-10-03 09:19:56,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:56,238 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-10-03 09:19:56,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 09:19:56,238 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-10-03 09:19:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-03 09:19:56,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:56,239 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-03 09:19:56,239 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:56,239 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:56,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1479170495, now seen corresponding path program 42 times [2018-10-03 09:19:56,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:56,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:56,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:56,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:56,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 25 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:58,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:58,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:19:58,530 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:19:58,584 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-03 09:19:58,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:58,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 25 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:00,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:00,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 82 [2018-10-03 09:20:00,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 09:20:00,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 09:20:00,162 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:00,162 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 83 states. [2018-10-03 09:20:13,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:13,549 INFO L93 Difference]: Finished difference Result 394 states and 399 transitions. [2018-10-03 09:20:13,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-03 09:20:13,550 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 184 [2018-10-03 09:20:13,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:13,551 INFO L225 Difference]: With dead ends: 394 [2018-10-03 09:20:13,551 INFO L226 Difference]: Without dead ends: 292 [2018-10-03 09:20:13,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3s Time 8.3s impTime 56 [2018-10-03 09:20:13,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-10-03 09:20:13,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 189. [2018-10-03 09:20:13,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-03 09:20:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2018-10-03 09:20:13,591 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 184 [2018-10-03 09:20:13,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:13,592 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2018-10-03 09:20:13,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 09:20:13,592 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2018-10-03 09:20:13,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-03 09:20:13,593 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:13,593 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1] [2018-10-03 09:20:13,593 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:13,593 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:13,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1293219048, now seen corresponding path program 43 times [2018-10-03 09:20:13,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:13,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:13,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:13,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:13,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 1378 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:14,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:14,881 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:14,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:14,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 1378 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:15,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:15,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2018-10-03 09:20:15,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 09:20:15,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 09:20:15,794 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:15,794 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 83 states. [2018-10-03 09:20:18,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:18,842 INFO L93 Difference]: Finished difference Result 405 states and 409 transitions. [2018-10-03 09:20:18,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 09:20:18,843 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 188 [2018-10-03 09:20:18,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:18,844 INFO L225 Difference]: With dead ends: 405 [2018-10-03 09:20:18,844 INFO L226 Difference]: Without dead ends: 194 [2018-10-03 09:20:18,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 1.9s impTime 32 [2018-10-03 09:20:18,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-03 09:20:18,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2018-10-03 09:20:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-03 09:20:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2018-10-03 09:20:18,885 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 188 [2018-10-03 09:20:18,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:18,885 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2018-10-03 09:20:18,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 09:20:18,886 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2018-10-03 09:20:18,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-03 09:20:18,886 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:18,886 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1] [2018-10-03 09:20:18,887 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:18,887 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:18,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1734936480, now seen corresponding path program 44 times [2018-10-03 09:20:18,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:18,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:18,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:18,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:18,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2458 backedges. 26 proven. 2432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:21,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:21,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:20:21,341 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:20:21,381 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:20:21,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:21,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2458 backedges. 1352 proven. 1106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:24,925 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:24,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 58] total 114 [2018-10-03 09:20:24,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-10-03 09:20:24,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-10-03 09:20:24,926 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:24,927 INFO L87 Difference]: Start difference. First operand 192 states and 194 transitions. Second operand 115 states. Received shutdown request... [2018-10-03 09:20:33,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-03 09:20:33,556 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 09:20:33,562 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 09:20:33,563 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 09:20:33 BoogieIcfgContainer [2018-10-03 09:20:33,563 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 09:20:33,564 INFO L168 Benchmark]: Toolchain (without parser) took 242952.48 ms. Allocated memory was 1.6 GB in the beginning and 1.4 GB in the end (delta: -105.4 MB). Free memory was 1.5 GB in the beginning and 939.6 MB in the end (delta: 541.8 MB). Peak memory consumption was 436.4 MB. Max. memory is 7.1 GB. [2018-10-03 09:20:33,566 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:20:33,566 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.97 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:20:33,567 INFO L168 Benchmark]: Boogie Preprocessor took 25.25 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:20:33,567 INFO L168 Benchmark]: RCFGBuilder took 401.56 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-03 09:20:33,568 INFO L168 Benchmark]: TraceAbstraction took 242473.60 ms. Allocated memory was 1.6 GB in the beginning and 1.4 GB in the end (delta: -105.4 MB). Free memory was 1.5 GB in the beginning and 939.6 MB in the end (delta: 520.6 MB). Peak memory consumption was 415.3 MB. Max. memory is 7.1 GB. [2018-10-03 09:20:33,572 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.97 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.25 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 401.56 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 242473.60 ms. Allocated memory was 1.6 GB in the beginning and 1.4 GB in the end (delta: -105.4 MB). Free memory was 1.5 GB in the beginning and 939.6 MB in the end (delta: 520.6 MB). Peak memory consumption was 415.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 34]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 34). Cancelled while BasicCegarLoop was constructing difference of abstraction (192states) and FLOYD_HOARE automaton (currently 108 states, 115 states before enhancement), while ReachableStatesComputation was computing reachable states (186 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 242.4s OverallTime, 48 OverallIterations, 27 TraceHistogramMax, 158.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 863 SDtfs, 4207 SDslu, 24216 SDs, 0 SdLazy, 123165 SolverSat, 1629 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 71.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7393 GetRequests, 3755 SyntacticMatches, 18 SemanticMatches, 3620 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 143.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=192occurred in iteration=47, 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: 0.9s AutomataMinimizationTime, 47 MinimizatonAttempts, 1377 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 78.6s InterpolantComputationTime, 9196 NumberOfCodeBlocks, 9094 NumberOfCodeBlocksAsserted, 405 NumberOfCheckSat, 9103 ConstructedInterpolants, 0 QuantifiedInterpolants, 9028537 SizeOfPredicates, 144 NumberOfNonLiveVariables, 6667 ConjunctsInSsa, 1952 ConjunctsInUnsatCore, 93 InterpolantComputations, 3 PerfectInterpolantSequences, 23919/79214 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_09-20-33-583.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_09-20-33-583.csv Completed graceful shutdown