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/20170304-DifficultPathPrograms/down.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:48:39,978 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:48:39,980 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:48:39,993 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:48:39,993 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:48:39,994 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:48:39,996 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:48:39,998 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:48:40,000 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:48:40,001 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:48:40,002 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:48:40,047 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-26 21:48:40,069 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:48:40,069 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:48:40,070 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:48:40,071 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:48:40,071 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:48:40,071 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:48:40,076 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:48:40,077 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:48:40,077 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:48:40,077 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:48:40,077 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:48:40,077 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:48:40,078 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:48:40,078 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:48:40,078 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:48:40,078 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:48:40,078 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:48:40,079 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:48:40,079 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:48:40,079 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:48:40,079 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:48:40,079 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:48:40,079 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:48:40,080 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:48:40,080 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:48:40,080 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:48:40,080 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:48:40,081 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:48:40,081 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:48:40,081 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:48:40,081 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-26 21:48:40,124 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:48:40,138 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:48:40,142 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:48:40,143 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:48:40,144 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:48:40,145 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/down.i_4.bpl [2018-09-26 21:48:40,145 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/down.i_4.bpl' [2018-09-26 21:48:40,193 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:48:40,196 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:48:40,197 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:48:40,197 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:48:40,197 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:48:40,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:48:40" (1/1) ... [2018-09-26 21:48:40,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:48:40" (1/1) ... [2018-09-26 21:48:40,237 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:48:40,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:48:40,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:48:40,238 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:48:40,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:48:40" (1/1) ... [2018-09-26 21:48:40,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:48:40" (1/1) ... [2018-09-26 21:48:40,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:48:40" (1/1) ... [2018-09-26 21:48:40,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:48:40" (1/1) ... [2018-09-26 21:48:40,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:48:40" (1/1) ... [2018-09-26 21:48:40,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:48:40" (1/1) ... [2018-09-26 21:48:40,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:48:40" (1/1) ... [2018-09-26 21:48:40,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:48:40,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:48:40,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:48:40,259 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:48:40,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:48:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:48:40,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:48:40,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:48:40,605 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:48:40,606 INFO L202 PluginConnector]: Adding new model down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:48:40 BoogieIcfgContainer [2018-09-26 21:48:40,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:48:40,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:48:40,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:48:40,610 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:48:40,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:48:40" (1/2) ... [2018-09-26 21:48:40,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7535d1d6 and model type down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:48:40, skipping insertion in model container [2018-09-26 21:48:40,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:48:40" (2/2) ... [2018-09-26 21:48:40,614 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i_4.bpl [2018-09-26 21:48:40,625 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:48:40,633 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:48:40,681 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:48:40,682 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:48:40,682 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:48:40,682 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:48:40,683 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:48:40,683 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:48:40,683 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:48:40,683 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:48:40,683 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:48:40,701 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-26 21:48:40,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:48:40,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:40,708 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-26 21:48:40,709 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:40,717 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:40,717 INFO L82 PathProgramCache]: Analyzing trace with hash 889539593, now seen corresponding path program 1 times [2018-09-26 21:48:40,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:40,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:40,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:40,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:40,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:40,956 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:48:40,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:48:40,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:48:40,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:48:40,979 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:40,982 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-09-26 21:48:41,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:41,212 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-09-26 21:48:41,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:48:41,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-26 21:48:41,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:41,224 INFO L225 Difference]: With dead ends: 16 [2018-09-26 21:48:41,224 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:48:41,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:41,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:48:41,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:48:41,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:48:41,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-26 21:48:41,260 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-09-26 21:48:41,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:41,261 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-26 21:48:41,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:48:41,261 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-26 21:48:41,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:48:41,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:41,262 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:48:41,262 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:41,262 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:41,263 INFO L82 PathProgramCache]: Analyzing trace with hash 198622019, now seen corresponding path program 1 times [2018-09-26 21:48:41,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:41,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:41,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:41,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:41,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:41,324 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:48:41,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-26 21:48:41,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:48:41,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:48:41,326 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:41,326 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-09-26 21:48:41,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:41,869 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-26 21:48:41,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:48:41,871 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-26 21:48:41,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:41,872 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:48:41,872 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:48:41,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:41,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:48:41,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-09-26 21:48:41,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:48:41,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-26 21:48:41,880 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-26 21:48:41,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:41,881 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-26 21:48:41,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:48:41,881 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-26 21:48:41,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:48:41,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:41,882 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:48:41,883 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:41,883 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:41,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1897132479, now seen corresponding path program 1 times [2018-09-26 21:48:41,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:41,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:41,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:41,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:41,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:41,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:41,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:41,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:42,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:42,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:42,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:48:42,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:48:42,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:48:42,145 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:42,145 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-09-26 21:48:42,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:42,498 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-09-26 21:48:42,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:48:42,500 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-26 21:48:42,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:42,500 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:48:42,501 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:48:42,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:42,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:48:42,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:48:42,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:48:42,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-26 21:48:42,510 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-09-26 21:48:42,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:42,511 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-26 21:48:42,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:48:42,511 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-26 21:48:42,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:48:42,512 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:42,512 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-09-26 21:48:42,513 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:42,513 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:42,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1765329927, now seen corresponding path program 2 times [2018-09-26 21:48:42,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:42,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:42,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:42,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:42,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:42,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:42,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:42,626 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:48:42,641 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:48:42,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:42,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:43,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:43,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-09-26 21:48:43,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:48:43,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:48:43,031 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:43,031 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-09-26 21:48:43,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:43,528 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-26 21:48:43,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:48:43,529 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-09-26 21:48:43,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:43,529 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:48:43,530 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:48:43,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:43,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:48:43,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-09-26 21:48:43,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:48:43,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-26 21:48:43,536 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-09-26 21:48:43,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:43,536 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-26 21:48:43,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:48:43,536 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-26 21:48:43,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:48:43,537 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:43,537 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-26 21:48:43,537 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:43,538 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:43,538 INFO L82 PathProgramCache]: Analyzing trace with hash 29955317, now seen corresponding path program 3 times [2018-09-26 21:48:43,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:43,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:43,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:43,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:43,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:43,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:43,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:43,757 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:48:43,810 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-26 21:48:43,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:43,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:44,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:44,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:48:44,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:48:44,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:48:44,257 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:44,258 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-09-26 21:48:44,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:44,734 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-09-26 21:48:44,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:48:44,736 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-26 21:48:44,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:44,737 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:48:44,737 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:48:44,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:44,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:48:44,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:48:44,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:48:44,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-26 21:48:44,742 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-09-26 21:48:44,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:44,743 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-26 21:48:44,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:48:44,743 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-26 21:48:44,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:48:44,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:44,744 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-09-26 21:48:44,744 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:44,744 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:44,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1153652177, now seen corresponding path program 4 times [2018-09-26 21:48:44,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:44,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:44,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:44,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:44,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:44,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:44,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:44,912 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:48:44,949 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:48:44,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:44,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:45,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:45,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:45,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-09-26 21:48:45,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:48:45,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:48:45,208 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:45,208 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-09-26 21:48:45,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:45,468 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-26 21:48:45,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:48:45,469 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-26 21:48:45,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:45,470 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:48:45,471 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:48:45,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:45,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:48:45,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-09-26 21:48:45,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:48:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-26 21:48:45,477 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-09-26 21:48:45,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:45,477 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-26 21:48:45,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:48:45,478 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-26 21:48:45,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:48:45,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:45,479 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-26 21:48:45,479 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:45,479 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:45,479 INFO L82 PathProgramCache]: Analyzing trace with hash -558246485, now seen corresponding path program 5 times [2018-09-26 21:48:45,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:45,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:45,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:45,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:45,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:45,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:45,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:45,646 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:48:45,670 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-26 21:48:45,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:45,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:45,779 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:45,780 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:48:45,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:48:45,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:48:45,780 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:45,780 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-09-26 21:48:46,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:46,132 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-09-26 21:48:46,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:48:46,132 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-26 21:48:46,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:46,133 INFO L225 Difference]: With dead ends: 32 [2018-09-26 21:48:46,133 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:48:46,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:48:46,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:48:46,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:48:46,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-26 21:48:46,138 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-09-26 21:48:46,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:46,138 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-26 21:48:46,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:48:46,138 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-26 21:48:46,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:48:46,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:46,139 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-09-26 21:48:46,140 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:46,140 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:46,140 INFO L82 PathProgramCache]: Analyzing trace with hash -578011675, now seen corresponding path program 6 times [2018-09-26 21:48:46,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:46,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:46,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:46,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:46,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:46,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:46,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:46,283 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:48:46,305 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-26 21:48:46,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:46,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:46,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:46,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-09-26 21:48:46,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:48:46,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:48:46,404 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:46,404 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-09-26 21:48:46,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:46,769 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-26 21:48:46,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:48:46,769 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-09-26 21:48:46,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:46,771 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:48:46,771 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:48:46,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:46,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:48:46,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-09-26 21:48:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:48:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-26 21:48:46,778 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-09-26 21:48:46,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:46,779 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-26 21:48:46,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:48:46,779 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-26 21:48:46,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:48:46,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:46,780 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-09-26 21:48:46,780 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:46,780 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:46,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1418505247, now seen corresponding path program 7 times [2018-09-26 21:48:46,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:46,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:46,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:46,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:46,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:46,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:46,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:46,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:46,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:47,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:47,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:48:47,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:48:47,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:48:47,063 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:47,063 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-09-26 21:48:47,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:47,473 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-09-26 21:48:47,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:48:47,473 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-26 21:48:47,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:47,474 INFO L225 Difference]: With dead ends: 38 [2018-09-26 21:48:47,474 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:48:47,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:47,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:48:47,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:48:47,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:48:47,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-26 21:48:47,480 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-09-26 21:48:47,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:47,480 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-26 21:48:47,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:48:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-26 21:48:47,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:48:47,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:47,482 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-09-26 21:48:47,482 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:47,482 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:47,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1375531237, now seen corresponding path program 8 times [2018-09-26 21:48:47,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:47,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:47,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:47,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:47,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:47,670 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:47,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:47,680 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:48:47,696 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:48:47,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:47,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:47,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:47,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-09-26 21:48:47,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:48:47,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:48:47,817 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:47,817 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-09-26 21:48:48,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:48,534 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-26 21:48:48,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:48:48,535 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-09-26 21:48:48,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:48,535 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:48:48,535 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:48:48,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:48,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:48:48,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-09-26 21:48:48,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:48:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-26 21:48:48,542 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-09-26 21:48:48,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:48,542 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-26 21:48:48,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:48:48,542 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-26 21:48:48,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:48:48,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:48,543 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-26 21:48:48,543 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:48,544 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:48,544 INFO L82 PathProgramCache]: Analyzing trace with hash 964341655, now seen corresponding path program 9 times [2018-09-26 21:48:48,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:48,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:48,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:48,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:48,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:48,799 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:48,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:48,807 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:48:48,836 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:48:48,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:48,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:49,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:49,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:48:49,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:48:49,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:48:49,601 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:49,601 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-09-26 21:48:50,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:50,882 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-26 21:48:50,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:48:50,883 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-26 21:48:50,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:50,883 INFO L225 Difference]: With dead ends: 44 [2018-09-26 21:48:50,884 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:48:50,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:50,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:48:50,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:48:50,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:48:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-26 21:48:50,889 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-09-26 21:48:50,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:50,890 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-26 21:48:50,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:48:50,890 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-26 21:48:50,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:48:50,890 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:50,891 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-09-26 21:48:50,891 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:50,891 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:50,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1427751471, now seen corresponding path program 10 times [2018-09-26 21:48:50,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:50,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:50,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:50,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:50,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:51,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:51,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:51,215 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:48:51,252 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:48:51,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:51,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:51,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:51,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-09-26 21:48:51,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:48:51,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:48:51,565 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:51,565 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-09-26 21:48:52,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:52,306 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-26 21:48:52,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:48:52,307 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-09-26 21:48:52,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:52,307 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:48:52,307 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:48:52,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:52,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:48:52,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-09-26 21:48:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:48:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-26 21:48:52,314 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-09-26 21:48:52,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:52,314 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-26 21:48:52,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:48:52,314 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-26 21:48:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:48:52,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:52,315 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-09-26 21:48:52,315 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:52,316 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:52,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1974662963, now seen corresponding path program 11 times [2018-09-26 21:48:52,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:52,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:52,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:52,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:52,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:52,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:52,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:52,467 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:48:52,490 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:48:52,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:52,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:52,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:52,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:48:52,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:48:52,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:48:52,592 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:52,592 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-09-26 21:48:53,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:53,286 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-09-26 21:48:53,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:48:53,286 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-26 21:48:53,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:53,287 INFO L225 Difference]: With dead ends: 50 [2018-09-26 21:48:53,287 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:48:53,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:53,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:48:53,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-26 21:48:53,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:48:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-26 21:48:53,293 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-09-26 21:48:53,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:53,293 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-26 21:48:53,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:48:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-26 21:48:53,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:48:53,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:53,295 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-09-26 21:48:53,295 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:53,295 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:53,295 INFO L82 PathProgramCache]: Analyzing trace with hash 577956359, now seen corresponding path program 12 times [2018-09-26 21:48:53,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:53,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:53,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:53,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:53,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:53,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:53,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:53,523 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:48:53,557 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:48:53,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:53,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:53,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:53,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-09-26 21:48:53,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:48:53,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:48:53,679 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:53,680 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-09-26 21:48:54,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:54,106 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-26 21:48:54,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:48:54,107 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-09-26 21:48:54,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:54,108 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:48:54,108 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:48:54,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:54,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:48:54,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-09-26 21:48:54,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:48:54,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-26 21:48:54,116 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-09-26 21:48:54,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:54,116 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-26 21:48:54,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:48:54,116 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-26 21:48:54,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:48:54,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:54,117 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-26 21:48:54,117 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:54,118 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:54,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1365213059, now seen corresponding path program 13 times [2018-09-26 21:48:54,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:54,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:54,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:54,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:54,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:54,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:54,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:54,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:54,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:54,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:54,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:48:54,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:48:54,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:48:54,607 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:54,607 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-09-26 21:48:55,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:55,556 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-09-26 21:48:55,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:48:55,557 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-26 21:48:55,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:55,557 INFO L225 Difference]: With dead ends: 56 [2018-09-26 21:48:55,557 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:48:55,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:55,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:48:55,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:48:55,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:48:55,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-26 21:48:55,564 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-09-26 21:48:55,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:55,565 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-26 21:48:55,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:48:55,565 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-26 21:48:55,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:48:55,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:55,566 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-09-26 21:48:55,566 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:55,566 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:55,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1260506179, now seen corresponding path program 14 times [2018-09-26 21:48:55,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:55,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:55,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:55,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:55,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:56,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:56,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:56,379 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:48:56,399 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:48:56,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:56,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:56,549 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:56,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-09-26 21:48:56,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:48:56,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:48:56,550 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:56,550 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-09-26 21:48:57,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:57,009 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-26 21:48:57,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:48:57,009 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-09-26 21:48:57,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:57,010 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:48:57,010 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:48:57,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:57,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:48:57,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-09-26 21:48:57,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:48:57,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-26 21:48:57,021 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-09-26 21:48:57,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:57,022 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-26 21:48:57,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:48:57,022 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-26 21:48:57,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:48:57,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:57,023 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-09-26 21:48:57,023 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:57,023 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:57,023 INFO L82 PathProgramCache]: Analyzing trace with hash -165727303, now seen corresponding path program 15 times [2018-09-26 21:48:57,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:57,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:57,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:57,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:57,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:57,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:57,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:57,373 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:48:57,400 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:48:57,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:57,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:57,545 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:57,545 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:48:57,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:48:57,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:48:57,546 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:57,546 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-09-26 21:48:58,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:58,494 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-09-26 21:48:58,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:48:58,494 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-26 21:48:58,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:58,495 INFO L225 Difference]: With dead ends: 62 [2018-09-26 21:48:58,495 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:48:58,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:58,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:48:58,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:48:58,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:48:58,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-26 21:48:58,503 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-09-26 21:48:58,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:58,503 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-26 21:48:58,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:48:58,503 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-26 21:48:58,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:48:58,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:58,504 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-09-26 21:48:58,505 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:58,505 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:58,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1448426227, now seen corresponding path program 16 times [2018-09-26 21:48:58,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:58,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:58,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:58,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:58,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:58,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:58,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:58,691 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:48:58,716 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:48:58,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:58,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:58,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:58,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-09-26 21:48:58,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:48:58,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:48:58,852 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:58,852 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-09-26 21:48:59,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:59,378 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-26 21:48:59,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:48:59,379 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-09-26 21:48:59,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:59,380 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:48:59,380 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:48:59,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:59,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:48:59,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-09-26 21:48:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:48:59,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-26 21:48:59,388 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-09-26 21:48:59,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:59,388 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-26 21:48:59,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:48:59,388 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-26 21:48:59,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:48:59,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:59,389 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-26 21:48:59,389 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:59,390 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:59,390 INFO L82 PathProgramCache]: Analyzing trace with hash 368133487, now seen corresponding path program 17 times [2018-09-26 21:48:59,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:59,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:59,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:59,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:59,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:59,699 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:59,699 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:48:59,707 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:48:59,737 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-26 21:48:59,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:59,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:59,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:59,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:48:59,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:48:59,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:48:59,854 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:59,854 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-09-26 21:49:01,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:01,285 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-26 21:49:01,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:49:01,285 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-26 21:49:01,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:01,285 INFO L225 Difference]: With dead ends: 68 [2018-09-26 21:49:01,286 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:49:01,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:01,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:49:01,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:49:01,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:49:01,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-26 21:49:01,294 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-09-26 21:49:01,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:01,294 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-26 21:49:01,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:49:01,295 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-26 21:49:01,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:49:01,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:01,295 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-09-26 21:49:01,296 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:01,296 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:01,296 INFO L82 PathProgramCache]: Analyzing trace with hash -788717655, now seen corresponding path program 18 times [2018-09-26 21:49:01,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:01,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:01,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:01,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:01,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:01,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:01,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:01,823 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:49:01,861 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-09-26 21:49:01,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:01,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:01,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:01,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-09-26 21:49:01,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:49:01,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:49:01,985 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:01,985 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-09-26 21:49:02,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:02,689 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-26 21:49:02,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:49:02,689 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-26 21:49:02,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:02,690 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:49:02,690 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:49:02,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:02,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:49:02,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-09-26 21:49:02,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:49:02,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-26 21:49:02,699 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-09-26 21:49:02,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:02,700 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-26 21:49:02,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:49:02,700 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-26 21:49:02,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:49:02,701 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:02,701 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-09-26 21:49:02,701 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:02,701 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:02,701 INFO L82 PathProgramCache]: Analyzing trace with hash -2043489115, now seen corresponding path program 19 times [2018-09-26 21:49:02,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:02,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:02,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:02,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:02,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:02,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:03,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:03,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:03,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:03,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:03,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:03,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:49:03,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:49:03,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:49:03,210 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:03,210 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-09-26 21:49:04,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:04,374 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-09-26 21:49:04,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:49:04,374 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-26 21:49:04,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:04,375 INFO L225 Difference]: With dead ends: 74 [2018-09-26 21:49:04,375 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:49:04,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:04,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:49:04,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-26 21:49:04,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:49:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-26 21:49:04,382 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-09-26 21:49:04,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:04,382 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-26 21:49:04,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:49:04,382 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-26 21:49:04,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:49:04,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:04,383 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-09-26 21:49:04,383 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:04,383 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:04,384 INFO L82 PathProgramCache]: Analyzing trace with hash -957152801, now seen corresponding path program 20 times [2018-09-26 21:49:04,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:04,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:04,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:04,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:04,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:04,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:04,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:04,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:49:04,602 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:49:04,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:04,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:04,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:04,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-09-26 21:49:04,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:49:04,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:49:04,892 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:04,893 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-09-26 21:49:05,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:05,770 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-26 21:49:05,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:49:05,773 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-09-26 21:49:05,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:05,773 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:49:05,773 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:49:05,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:05,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:49:05,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-09-26 21:49:05,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:49:05,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-26 21:49:05,783 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-09-26 21:49:05,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:05,783 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-26 21:49:05,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:49:05,783 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-26 21:49:05,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:49:05,784 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:05,784 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-26 21:49:05,784 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:05,784 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:05,784 INFO L82 PathProgramCache]: Analyzing trace with hash -700907173, now seen corresponding path program 21 times [2018-09-26 21:49:05,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:05,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:05,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:05,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:05,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:06,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:06,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:06,141 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:49:06,176 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 21:49:06,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:06,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:06,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:06,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:49:06,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:49:06,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:49:06,352 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:06,352 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-09-26 21:49:07,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:07,865 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-09-26 21:49:07,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:49:07,866 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-26 21:49:07,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:07,866 INFO L225 Difference]: With dead ends: 80 [2018-09-26 21:49:07,866 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:49:07,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:07,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:49:07,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:49:07,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:49:07,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-26 21:49:07,873 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-09-26 21:49:07,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:07,873 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-26 21:49:07,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:49:07,874 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-26 21:49:07,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:49:07,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:07,874 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-09-26 21:49:07,874 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:07,874 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:07,874 INFO L82 PathProgramCache]: Analyzing trace with hash 877396373, now seen corresponding path program 22 times [2018-09-26 21:49:07,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:07,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:07,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:07,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:07,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:08,070 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:08,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:08,078 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:49:08,110 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:49:08,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:08,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:08,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:08,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-09-26 21:49:08,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:49:08,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:49:08,282 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:08,282 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-09-26 21:49:08,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:08,871 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-26 21:49:08,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:49:08,872 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-09-26 21:49:08,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:08,873 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:49:08,873 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:49:08,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:49:08,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-09-26 21:49:08,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:49:08,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-26 21:49:08,881 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-09-26 21:49:08,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:08,881 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-26 21:49:08,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:49:08,881 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-26 21:49:08,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-26 21:49:08,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:08,882 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-09-26 21:49:08,882 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:08,882 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:08,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1364257681, now seen corresponding path program 23 times [2018-09-26 21:49:08,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:08,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:08,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:08,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:08,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:09,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:09,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:09,275 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:49:09,312 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-26 21:49:09,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:09,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:09,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:09,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:49:09,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:49:09,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:49:09,451 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:09,451 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-09-26 21:49:11,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:11,283 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-09-26 21:49:11,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:49:11,284 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-26 21:49:11,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:11,284 INFO L225 Difference]: With dead ends: 86 [2018-09-26 21:49:11,284 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:49:11,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:11,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:49:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-26 21:49:11,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:49:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-26 21:49:11,291 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-09-26 21:49:11,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:11,291 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-26 21:49:11,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:49:11,291 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-26 21:49:11,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:49:11,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:11,292 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-09-26 21:49:11,292 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:11,292 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:11,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1897217739, now seen corresponding path program 24 times [2018-09-26 21:49:11,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:11,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:11,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:11,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:11,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:11,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:11,680 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:11,687 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:49:11,725 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-26 21:49:11,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:11,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:11,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:11,868 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-09-26 21:49:11,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:49:11,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:49:11,869 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:11,869 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-09-26 21:49:12,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:12,803 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-26 21:49:12,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:49:12,804 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-09-26 21:49:12,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:12,805 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:49:12,805 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:49:12,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:12,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:49:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-09-26 21:49:12,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:49:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-26 21:49:12,814 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-09-26 21:49:12,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:12,814 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-26 21:49:12,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:49:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-26 21:49:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:49:12,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:12,815 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-26 21:49:12,815 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:12,816 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:12,816 INFO L82 PathProgramCache]: Analyzing trace with hash -2134920377, now seen corresponding path program 25 times [2018-09-26 21:49:12,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:12,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:12,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:12,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:12,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:13,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:13,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:13,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:13,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:13,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:13,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:49:13,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:49:13,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:49:13,705 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:13,705 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-09-26 21:49:15,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:15,386 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-26 21:49:15,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:49:15,387 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-26 21:49:15,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:15,387 INFO L225 Difference]: With dead ends: 92 [2018-09-26 21:49:15,387 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:49:15,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:15,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:49:15,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:49:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:49:15,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-26 21:49:15,394 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-09-26 21:49:15,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:15,394 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-26 21:49:15,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:49:15,395 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-26 21:49:15,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:49:15,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:15,395 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-09-26 21:49:15,395 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:15,395 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:15,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1286350463, now seen corresponding path program 26 times [2018-09-26 21:49:15,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:15,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:15,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:15,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:15,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:15,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:15,821 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:15,830 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:49:15,867 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:49:15,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:15,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:16,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:16,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-09-26 21:49:16,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:49:16,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:49:16,018 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:16,019 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-09-26 21:49:17,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:17,209 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-26 21:49:17,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:49:17,210 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-09-26 21:49:17,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:17,211 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:49:17,211 INFO L226 Difference]: Without dead ends: 67 [2018-09-26 21:49:17,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:17,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-26 21:49:17,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-09-26 21:49:17,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-26 21:49:17,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-26 21:49:17,220 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-09-26 21:49:17,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:17,220 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-26 21:49:17,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:49:17,220 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-26 21:49:17,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:49:17,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:17,221 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-09-26 21:49:17,221 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:17,221 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:17,221 INFO L82 PathProgramCache]: Analyzing trace with hash 767719549, now seen corresponding path program 27 times [2018-09-26 21:49:17,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:17,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:17,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:17,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:17,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:17,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:17,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:17,632 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:49:17,672 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-26 21:49:17,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:17,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:17,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:17,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:49:17,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:49:17,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:49:17,886 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:17,886 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-09-26 21:49:19,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:19,533 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-09-26 21:49:19,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:49:19,533 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-26 21:49:19,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:19,533 INFO L225 Difference]: With dead ends: 98 [2018-09-26 21:49:19,534 INFO L226 Difference]: Without dead ends: 65 [2018-09-26 21:49:19,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:19,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-26 21:49:19,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-26 21:49:19,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:49:19,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-26 21:49:19,542 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-09-26 21:49:19,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:19,542 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-26 21:49:19,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:49:19,542 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-26 21:49:19,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-26 21:49:19,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:19,543 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-09-26 21:49:19,543 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:19,543 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:19,543 INFO L82 PathProgramCache]: Analyzing trace with hash 285536695, now seen corresponding path program 28 times [2018-09-26 21:49:19,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:19,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:19,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:19,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:19,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:19,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:19,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:19,816 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:49:19,850 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:49:19,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:19,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:20,002 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:20,002 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-09-26 21:49:20,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:49:20,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:49:20,003 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:20,003 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-09-26 21:49:20,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:20,728 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-26 21:49:20,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:49:20,729 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-09-26 21:49:20,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:20,729 INFO L225 Difference]: With dead ends: 73 [2018-09-26 21:49:20,729 INFO L226 Difference]: Without dead ends: 71 [2018-09-26 21:49:20,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:20,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-26 21:49:20,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-09-26 21:49:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-26 21:49:20,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-26 21:49:20,739 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-09-26 21:49:20,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:20,739 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-26 21:49:20,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:49:20,739 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-26 21:49:20,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-26 21:49:20,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:20,740 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-26 21:49:20,740 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:20,740 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:20,740 INFO L82 PathProgramCache]: Analyzing trace with hash -477209805, now seen corresponding path program 29 times [2018-09-26 21:49:20,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:20,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:20,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:20,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:20,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:21,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:21,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:21,378 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:49:21,434 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-26 21:49:21,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:21,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:21,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:21,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:49:21,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:49:21,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:49:21,621 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:21,621 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-09-26 21:49:24,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:24,491 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-09-26 21:49:24,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:49:24,491 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-26 21:49:24,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:24,491 INFO L225 Difference]: With dead ends: 104 [2018-09-26 21:49:24,492 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:49:24,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:24,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:49:24,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-26 21:49:24,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-26 21:49:24,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-26 21:49:24,501 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-09-26 21:49:24,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:24,501 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-26 21:49:24,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:49:24,501 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-26 21:49:24,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:49:24,502 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:24,502 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-09-26 21:49:24,502 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:24,502 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:24,502 INFO L82 PathProgramCache]: Analyzing trace with hash 35497837, now seen corresponding path program 30 times [2018-09-26 21:49:24,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:24,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:24,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:24,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:24,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:24,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:24,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:24,836 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:49:24,883 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-09-26 21:49:24,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:24,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:25,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:25,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-09-26 21:49:25,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:49:25,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:49:25,072 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:25,072 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-09-26 21:49:26,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:26,000 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-26 21:49:26,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:49:26,001 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-09-26 21:49:26,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:26,001 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:49:26,001 INFO L226 Difference]: Without dead ends: 75 [2018-09-26 21:49:26,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:26,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-26 21:49:26,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-09-26 21:49:26,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-26 21:49:26,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-26 21:49:26,015 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-09-26 21:49:26,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:26,015 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-26 21:49:26,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:49:26,015 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-26 21:49:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-26 21:49:26,016 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:26,016 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-09-26 21:49:26,016 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:26,016 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:26,016 INFO L82 PathProgramCache]: Analyzing trace with hash -246383767, now seen corresponding path program 31 times [2018-09-26 21:49:26,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:26,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:26,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:26,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:26,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:26,882 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:26,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:26,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:26,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:27,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:27,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:49:27,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:49:27,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:49:27,117 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:27,117 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-09-26 21:49:29,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:29,634 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-09-26 21:49:29,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:49:29,634 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-26 21:49:29,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:29,634 INFO L225 Difference]: With dead ends: 110 [2018-09-26 21:49:29,634 INFO L226 Difference]: Without dead ends: 73 [2018-09-26 21:49:29,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:29,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-26 21:49:29,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-26 21:49:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:49:29,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-26 21:49:29,645 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-09-26 21:49:29,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:29,645 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-26 21:49:29,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:49:29,645 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-26 21:49:29,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:49:29,646 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:29,646 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-09-26 21:49:29,646 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:29,646 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:29,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1653283491, now seen corresponding path program 32 times [2018-09-26 21:49:29,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:29,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:29,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:29,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:29,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:29,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:29,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:29,887 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:49:29,931 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:49:29,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:29,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:30,107 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:30,107 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-09-26 21:49:30,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:49:30,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:49:30,108 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:30,108 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-09-26 21:49:30,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:30,959 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-26 21:49:30,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:49:30,959 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-09-26 21:49:30,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:30,960 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:49:30,961 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:49:30,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:30,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:49:30,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-09-26 21:49:30,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:49:30,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-26 21:49:30,974 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-09-26 21:49:30,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:30,974 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-26 21:49:30,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:49:30,974 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-26 21:49:30,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:49:30,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:30,975 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-26 21:49:30,975 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:30,975 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:30,976 INFO L82 PathProgramCache]: Analyzing trace with hash -332531425, now seen corresponding path program 33 times [2018-09-26 21:49:30,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:30,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:30,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:30,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:30,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:31,997 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:31,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:31,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:32,005 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:49:32,057 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-26 21:49:32,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:32,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:32,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:32,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:49:32,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:49:32,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:49:32,685 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:32,685 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-09-26 21:49:35,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:35,562 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-26 21:49:35,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:49:35,563 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-26 21:49:35,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:35,563 INFO L225 Difference]: With dead ends: 116 [2018-09-26 21:49:35,563 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:49:35,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:35,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:49:35,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-26 21:49:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:49:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-26 21:49:35,573 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-09-26 21:49:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:35,574 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-26 21:49:35,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:49:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-26 21:49:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:49:35,575 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:35,575 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-09-26 21:49:35,575 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:35,575 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:35,575 INFO L82 PathProgramCache]: Analyzing trace with hash -198022311, now seen corresponding path program 34 times [2018-09-26 21:49:35,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:35,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:35,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:35,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:35,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:35,878 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:35,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:35,886 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:49:35,927 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:49:35,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:35,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:36,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:36,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-09-26 21:49:36,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:49:36,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:49:36,111 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:36,111 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-09-26 21:49:37,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:37,031 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-26 21:49:37,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:49:37,031 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-09-26 21:49:37,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:37,032 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:49:37,032 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:49:37,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:37,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:49:37,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-09-26 21:49:37,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-26 21:49:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-26 21:49:37,043 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-09-26 21:49:37,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:37,043 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-26 21:49:37,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:49:37,043 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-26 21:49:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:49:37,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:37,044 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-09-26 21:49:37,044 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:37,044 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:37,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1320946603, now seen corresponding path program 35 times [2018-09-26 21:49:37,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:37,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:37,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:37,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:37,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:37,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:37,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:37,517 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:49:37,576 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-26 21:49:37,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:37,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:37,780 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:37,780 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:49:37,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:49:37,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:49:37,781 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:37,781 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-09-26 21:49:41,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:41,047 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-09-26 21:49:41,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:49:41,047 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-26 21:49:41,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:41,048 INFO L225 Difference]: With dead ends: 122 [2018-09-26 21:49:41,048 INFO L226 Difference]: Without dead ends: 81 [2018-09-26 21:49:41,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-26 21:49:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-26 21:49:41,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-26 21:49:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-26 21:49:41,058 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-09-26 21:49:41,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:41,059 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-26 21:49:41,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:49:41,059 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-26 21:49:41,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:49:41,059 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:41,060 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-09-26 21:49:41,060 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:41,060 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:41,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1626388879, now seen corresponding path program 36 times [2018-09-26 21:49:41,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:41,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:41,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:41,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:41,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:41,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:41,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:41,630 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:49:41,689 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-26 21:49:41,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:41,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:41,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:41,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-09-26 21:49:41,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:49:41,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:49:41,886 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:41,886 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-09-26 21:49:42,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:42,809 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-09-26 21:49:42,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:49:42,817 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-09-26 21:49:42,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:42,817 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:49:42,818 INFO L226 Difference]: Without dead ends: 87 [2018-09-26 21:49:42,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:42,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-26 21:49:42,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-09-26 21:49:42,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-26 21:49:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-26 21:49:42,830 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-09-26 21:49:42,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:42,830 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-26 21:49:42,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:49:42,830 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-26 21:49:42,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:49:42,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:42,831 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-26 21:49:42,831 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:42,831 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:42,831 INFO L82 PathProgramCache]: Analyzing trace with hash -408449781, now seen corresponding path program 37 times [2018-09-26 21:49:42,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:42,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:42,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:42,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:42,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:43,363 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:43,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:43,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:43,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:43,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:43,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:43,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:49:43,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:49:43,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:49:43,654 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:43,654 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-09-26 21:49:45,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:45,519 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-09-26 21:49:45,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:49:45,519 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-26 21:49:45,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:45,519 INFO L225 Difference]: With dead ends: 128 [2018-09-26 21:49:45,520 INFO L226 Difference]: Without dead ends: 85 [2018-09-26 21:49:45,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:45,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-26 21:49:45,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-26 21:49:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:49:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-26 21:49:45,531 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-09-26 21:49:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:45,531 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-26 21:49:45,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:49:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-26 21:49:45,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-26 21:49:45,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:45,532 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-09-26 21:49:45,532 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:45,532 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:45,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1130683067, now seen corresponding path program 38 times [2018-09-26 21:49:45,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:45,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:45,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:45,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:49:45,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:45,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:45,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:45,962 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:49:46,016 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:49:46,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:46,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:46,209 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:46,230 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:46,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-09-26 21:49:46,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:49:46,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:49:46,231 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:46,232 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-09-26 21:49:47,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:47,285 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-09-26 21:49:47,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:49:47,286 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-09-26 21:49:47,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:47,286 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:49:47,286 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:49:47,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:47,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:49:47,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-09-26 21:49:47,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-26 21:49:47,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-09-26 21:49:47,301 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-09-26 21:49:47,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:47,301 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-09-26 21:49:47,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:49:47,301 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-09-26 21:49:47,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-26 21:49:47,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:47,302 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-09-26 21:49:47,302 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:47,302 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:47,302 INFO L82 PathProgramCache]: Analyzing trace with hash 40231745, now seen corresponding path program 39 times [2018-09-26 21:49:47,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:47,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:47,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:47,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:47,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:47,976 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:47,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:47,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:49:48,048 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-26 21:49:48,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:48,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:48,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:48,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:49:48,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:49:48,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:49:48,342 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:48,342 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-09-26 21:49:52,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:52,391 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-09-26 21:49:52,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:49:52,391 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-26 21:49:52,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:52,391 INFO L225 Difference]: With dead ends: 134 [2018-09-26 21:49:52,391 INFO L226 Difference]: Without dead ends: 89 [2018-09-26 21:49:52,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:52,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-26 21:49:52,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-26 21:49:52,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-26 21:49:52,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-26 21:49:52,403 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-09-26 21:49:52,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:52,404 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-26 21:49:52,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:49:52,404 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-26 21:49:52,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:49:52,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:52,404 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-09-26 21:49:52,404 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:52,404 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:52,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2030121349, now seen corresponding path program 40 times [2018-09-26 21:49:52,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:52,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:52,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:52,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:52,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:52,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:52,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:52,882 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:49:52,931 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:49:52,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:52,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:53,190 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:53,190 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-09-26 21:49:53,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:49:53,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:49:53,191 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:53,191 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-09-26 21:49:54,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:54,462 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-09-26 21:49:54,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:49:54,463 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-09-26 21:49:54,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:54,463 INFO L225 Difference]: With dead ends: 97 [2018-09-26 21:49:54,463 INFO L226 Difference]: Without dead ends: 95 [2018-09-26 21:49:54,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-26 21:49:54,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-09-26 21:49:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:49:54,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-26 21:49:54,478 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-09-26 21:49:54,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:54,479 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-26 21:49:54,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:49:54,479 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-26 21:49:54,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-26 21:49:54,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:54,479 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-26 21:49:54,479 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:54,480 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:54,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1031530761, now seen corresponding path program 41 times [2018-09-26 21:49:54,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:54,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:54,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:54,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:54,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:54,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:54,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:54,962 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:49:55,030 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-26 21:49:55,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:55,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:49:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:55,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:49:55,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:49:55,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:49:55,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:49:55,259 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:49:55,259 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-09-26 21:49:59,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:49:59,309 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-26 21:49:59,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:49:59,309 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-26 21:49:59,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:49:59,310 INFO L225 Difference]: With dead ends: 140 [2018-09-26 21:49:59,310 INFO L226 Difference]: Without dead ends: 93 [2018-09-26 21:49:59,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:49:59,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-26 21:49:59,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-26 21:49:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-26 21:49:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-26 21:49:59,324 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-09-26 21:49:59,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:49:59,324 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-26 21:49:59,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:49:59,324 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-26 21:49:59,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:49:59,325 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:49:59,325 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-09-26 21:49:59,325 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:49:59,326 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:49:59,326 INFO L82 PathProgramCache]: Analyzing trace with hash 769709361, now seen corresponding path program 42 times [2018-09-26 21:49:59,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:49:59,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:49:59,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:59,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:49:59,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:49:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:49:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:49:59,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:49:59,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:49:59,804 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:49:59,876 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-09-26 21:49:59,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:49:59,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:00,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:00,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-09-26 21:50:00,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:50:00,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:50:00,087 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:00,087 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-09-26 21:50:01,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:01,246 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-09-26 21:50:01,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:50:01,247 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-09-26 21:50:01,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:01,247 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:50:01,247 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:50:01,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:50:01,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-09-26 21:50:01,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-26 21:50:01,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-09-26 21:50:01,262 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-09-26 21:50:01,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:01,263 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-09-26 21:50:01,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:50:01,263 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-09-26 21:50:01,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-26 21:50:01,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:01,263 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-09-26 21:50:01,264 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:01,264 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:01,264 INFO L82 PathProgramCache]: Analyzing trace with hash 956254253, now seen corresponding path program 43 times [2018-09-26 21:50:01,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:01,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:01,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:01,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:01,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:01,922 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:01,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:01,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:50:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:01,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:03,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:03,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:50:03,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:50:03,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:50:03,350 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:03,350 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-09-26 21:50:08,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:08,106 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-09-26 21:50:08,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:50:08,107 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-26 21:50:08,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:08,107 INFO L225 Difference]: With dead ends: 146 [2018-09-26 21:50:08,107 INFO L226 Difference]: Without dead ends: 97 [2018-09-26 21:50:08,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:08,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-26 21:50:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-26 21:50:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-26 21:50:08,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-26 21:50:08,122 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-09-26 21:50:08,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:08,122 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-26 21:50:08,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:50:08,122 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-26 21:50:08,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-26 21:50:08,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:08,123 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-09-26 21:50:08,123 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:08,123 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:08,123 INFO L82 PathProgramCache]: Analyzing trace with hash 251550055, now seen corresponding path program 44 times [2018-09-26 21:50:08,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:08,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:08,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:08,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:50:08,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:08,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:08,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:08,458 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:50:08,516 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:50:08,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:08,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:08,808 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:08,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-09-26 21:50:08,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:50:08,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:50:08,809 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:08,809 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-09-26 21:50:10,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:10,095 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-09-26 21:50:10,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:50:10,095 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-09-26 21:50:10,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:10,096 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:50:10,096 INFO L226 Difference]: Without dead ends: 103 [2018-09-26 21:50:10,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:10,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-26 21:50:10,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-09-26 21:50:10,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-26 21:50:10,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-26 21:50:10,111 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-09-26 21:50:10,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:10,111 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-26 21:50:10,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:50:10,112 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-26 21:50:10,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:50:10,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:10,112 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-26 21:50:10,112 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:10,112 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:10,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1221367523, now seen corresponding path program 45 times [2018-09-26 21:50:10,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:10,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:10,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:10,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:10,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:10,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:10,735 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:10,744 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:50:10,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-26 21:50:10,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:10,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:11,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:11,055 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:50:11,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:50:11,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:50:11,055 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:11,056 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-09-26 21:50:16,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:16,737 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-09-26 21:50:16,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:50:16,738 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-26 21:50:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:16,739 INFO L225 Difference]: With dead ends: 152 [2018-09-26 21:50:16,739 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:50:16,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:16,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:50:16,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:50:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:50:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-26 21:50:16,762 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-09-26 21:50:16,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:16,762 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-26 21:50:16,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:50:16,762 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-26 21:50:16,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:50:16,763 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:16,763 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-09-26 21:50:16,763 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:16,763 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:16,763 INFO L82 PathProgramCache]: Analyzing trace with hash -99845347, now seen corresponding path program 46 times [2018-09-26 21:50:16,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:16,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:16,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:16,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:16,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:17,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:17,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:17,178 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:50:17,239 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:50:17,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:17,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:17,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:17,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-09-26 21:50:17,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:50:17,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:50:17,463 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:17,463 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-09-26 21:50:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:18,684 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-09-26 21:50:18,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:50:18,684 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-09-26 21:50:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:18,685 INFO L225 Difference]: With dead ends: 109 [2018-09-26 21:50:18,685 INFO L226 Difference]: Without dead ends: 107 [2018-09-26 21:50:18,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:18,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-26 21:50:18,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-09-26 21:50:18,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-26 21:50:18,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-09-26 21:50:18,705 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-09-26 21:50:18,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:18,705 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-09-26 21:50:18,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:50:18,705 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-09-26 21:50:18,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-26 21:50:18,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:18,706 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-09-26 21:50:18,706 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:18,706 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:18,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1462164711, now seen corresponding path program 47 times [2018-09-26 21:50:18,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:18,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:18,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:18,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:18,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:19,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:19,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:19,709 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:50:19,789 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-26 21:50:19,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:19,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:20,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:20,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:50:20,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:50:20,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:50:20,091 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:20,091 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-09-26 21:50:25,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:25,368 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-09-26 21:50:25,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:50:25,368 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-26 21:50:25,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:25,369 INFO L225 Difference]: With dead ends: 158 [2018-09-26 21:50:25,369 INFO L226 Difference]: Without dead ends: 105 [2018-09-26 21:50:25,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-26 21:50:25,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-26 21:50:25,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-26 21:50:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-26 21:50:25,392 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-09-26 21:50:25,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:25,392 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-26 21:50:25,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:50:25,392 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-26 21:50:25,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-26 21:50:25,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:25,393 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-09-26 21:50:25,393 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:25,393 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:25,394 INFO L82 PathProgramCache]: Analyzing trace with hash 850942547, now seen corresponding path program 48 times [2018-09-26 21:50:25,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:25,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:25,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:25,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:25,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:26,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:26,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:26,758 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:50:26,836 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-26 21:50:26,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:26,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:27,414 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:27,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-09-26 21:50:27,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:50:27,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:50:27,415 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:27,415 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-09-26 21:50:28,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:28,735 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-09-26 21:50:28,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:50:28,735 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-09-26 21:50:28,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:28,736 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:50:28,736 INFO L226 Difference]: Without dead ends: 111 [2018-09-26 21:50:28,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:28,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-26 21:50:28,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-09-26 21:50:28,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-26 21:50:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-26 21:50:28,760 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-09-26 21:50:28,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:28,760 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-26 21:50:28,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:50:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-26 21:50:28,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-26 21:50:28,761 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:28,761 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-26 21:50:28,761 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:28,761 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:28,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1711934671, now seen corresponding path program 49 times [2018-09-26 21:50:28,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:28,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:28,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:28,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:28,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:29,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:29,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:29,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:50:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:30,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:30,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:30,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:50:30,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:50:30,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:50:30,259 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:30,259 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-09-26 21:50:35,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:35,915 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-26 21:50:35,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:50:35,915 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-26 21:50:35,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:35,916 INFO L225 Difference]: With dead ends: 164 [2018-09-26 21:50:35,916 INFO L226 Difference]: Without dead ends: 109 [2018-09-26 21:50:35,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:35,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-26 21:50:35,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-26 21:50:35,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-26 21:50:35,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-26 21:50:35,936 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-09-26 21:50:35,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:35,937 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-26 21:50:35,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:50:35,937 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-26 21:50:35,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-26 21:50:35,937 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:35,937 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-09-26 21:50:35,938 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:35,938 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:35,938 INFO L82 PathProgramCache]: Analyzing trace with hash -223930615, now seen corresponding path program 50 times [2018-09-26 21:50:35,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:35,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:35,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:35,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:50:35,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:36,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:36,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:36,501 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:50:36,568 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:50:36,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:36,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:36,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:36,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-09-26 21:50:36,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:50:36,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:50:36,905 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:36,905 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-09-26 21:50:38,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:38,332 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-09-26 21:50:38,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:50:38,333 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-09-26 21:50:38,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:38,333 INFO L225 Difference]: With dead ends: 117 [2018-09-26 21:50:38,333 INFO L226 Difference]: Without dead ends: 115 [2018-09-26 21:50:38,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:38,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-26 21:50:38,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-09-26 21:50:38,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-26 21:50:38,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-09-26 21:50:38,352 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-09-26 21:50:38,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:38,352 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-09-26 21:50:38,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:50:38,352 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-09-26 21:50:38,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-26 21:50:38,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:38,353 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-09-26 21:50:38,353 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:38,353 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:38,353 INFO L82 PathProgramCache]: Analyzing trace with hash -449022971, now seen corresponding path program 51 times [2018-09-26 21:50:38,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:38,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:38,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:38,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:38,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:39,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:39,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:39,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:50:39,508 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-26 21:50:39,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:39,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:39,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:39,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:50:39,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:50:39,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:50:39,907 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:39,907 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-09-26 21:50:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:43,315 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-09-26 21:50:43,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:50:43,315 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-26 21:50:43,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:43,315 INFO L225 Difference]: With dead ends: 170 [2018-09-26 21:50:43,315 INFO L226 Difference]: Without dead ends: 113 [2018-09-26 21:50:43,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-26 21:50:43,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-26 21:50:43,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-26 21:50:43,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-26 21:50:43,337 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-09-26 21:50:43,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:43,337 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-26 21:50:43,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:50:43,338 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-26 21:50:43,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-26 21:50:43,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:43,338 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-09-26 21:50:43,338 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:43,338 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:43,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1802883391, now seen corresponding path program 52 times [2018-09-26 21:50:43,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:43,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:43,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:43,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:43,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:43,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:43,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:43,825 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:50:43,886 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:50:43,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:43,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:44,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:44,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-09-26 21:50:44,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:50:44,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:50:44,369 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:44,369 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-09-26 21:50:46,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:46,077 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-09-26 21:50:46,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:50:46,078 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-09-26 21:50:46,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:46,078 INFO L225 Difference]: With dead ends: 121 [2018-09-26 21:50:46,078 INFO L226 Difference]: Without dead ends: 119 [2018-09-26 21:50:46,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:46,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-26 21:50:46,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-09-26 21:50:46,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 21:50:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-26 21:50:46,097 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-09-26 21:50:46,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:46,098 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-26 21:50:46,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:50:46,098 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-26 21:50:46,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-26 21:50:46,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:46,098 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-26 21:50:46,099 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:46,099 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:46,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1699051707, now seen corresponding path program 53 times [2018-09-26 21:50:46,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:46,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:46,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:46,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:46,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:46,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:46,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:46,996 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:50:47,095 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-26 21:50:47,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:47,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:47,375 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:47,375 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:50:47,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:50:47,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:50:47,376 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:47,376 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-09-26 21:50:53,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:53,113 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-09-26 21:50:53,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:50:53,113 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-26 21:50:53,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:53,114 INFO L225 Difference]: With dead ends: 176 [2018-09-26 21:50:53,114 INFO L226 Difference]: Without dead ends: 117 [2018-09-26 21:50:53,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-26 21:50:53,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-26 21:50:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-26 21:50:53,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-26 21:50:53,134 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-09-26 21:50:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:53,134 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-26 21:50:53,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:50:53,134 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-26 21:50:53,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-26 21:50:53,134 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:53,134 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-09-26 21:50:53,135 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:53,135 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:53,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1220126965, now seen corresponding path program 54 times [2018-09-26 21:50:53,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:53,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:53,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:53,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:53,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:53,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:53,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:53,999 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:50:54,087 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-09-26 21:50:54,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:50:54,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:55,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:55,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-09-26 21:50:55,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:50:55,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:50:55,464 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:55,464 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-09-26 21:50:57,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:50:57,204 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-09-26 21:50:57,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:50:57,204 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-09-26 21:50:57,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:50:57,205 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:50:57,205 INFO L226 Difference]: Without dead ends: 123 [2018-09-26 21:50:57,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:50:57,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-26 21:50:57,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-09-26 21:50:57,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-26 21:50:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-09-26 21:50:57,231 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-09-26 21:50:57,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:50:57,231 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-09-26 21:50:57,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:50:57,231 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-09-26 21:50:57,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-26 21:50:57,232 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:50:57,232 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-09-26 21:50:57,232 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:50:57,232 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:50:57,232 INFO L82 PathProgramCache]: Analyzing trace with hash 15874801, now seen corresponding path program 55 times [2018-09-26 21:50:57,232 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:50:57,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:50:57,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:57,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:50:57,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:50:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:57,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:57,946 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:50:57,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:50:57,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:50:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:50:58,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:50:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:50:58,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:50:58,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-26 21:50:58,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:50:58,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:50:58,372 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:50:58,373 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 60 states. [2018-09-26 21:51:05,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:05,665 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-09-26 21:51:05,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:51:05,665 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-26 21:51:05,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:05,665 INFO L225 Difference]: With dead ends: 182 [2018-09-26 21:51:05,665 INFO L226 Difference]: Without dead ends: 121 [2018-09-26 21:51:05,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:05,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-26 21:51:05,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-26 21:51:05,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-26 21:51:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-09-26 21:51:05,686 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-09-26 21:51:05,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:05,686 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-09-26 21:51:05,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:51:05,686 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-09-26 21:51:05,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-26 21:51:05,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:05,686 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-09-26 21:51:05,687 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:05,687 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:05,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1308639701, now seen corresponding path program 56 times [2018-09-26 21:51:05,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:05,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:05,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:05,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:51:05,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:06,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:06,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:51:06,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:51:06,336 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:51:06,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:06,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:06,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:06,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-09-26 21:51:06,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:51:06,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:51:06,742 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:06,743 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-09-26 21:51:08,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:08,304 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-09-26 21:51:08,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:51:08,304 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-09-26 21:51:08,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:08,305 INFO L225 Difference]: With dead ends: 129 [2018-09-26 21:51:08,305 INFO L226 Difference]: Without dead ends: 127 [2018-09-26 21:51:08,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-26 21:51:08,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-09-26 21:51:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-26 21:51:08,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-26 21:51:08,326 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-09-26 21:51:08,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:08,326 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-26 21:51:08,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:51:08,326 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-26 21:51:08,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-26 21:51:08,326 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:08,327 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-26 21:51:08,327 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:08,327 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:08,327 INFO L82 PathProgramCache]: Analyzing trace with hash 822598311, now seen corresponding path program 57 times [2018-09-26 21:51:08,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:08,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:08,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:08,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:08,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:09,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:09,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:51:09,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:51:09,187 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-26 21:51:09,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:09,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:09,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:09,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-26 21:51:09,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:51:09,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:51:09,531 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:09,531 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 62 states. [2018-09-26 21:51:16,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:16,015 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-09-26 21:51:16,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:51:16,015 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-26 21:51:16,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:16,016 INFO L225 Difference]: With dead ends: 188 [2018-09-26 21:51:16,016 INFO L226 Difference]: Without dead ends: 125 [2018-09-26 21:51:16,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:16,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-26 21:51:16,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-26 21:51:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-26 21:51:16,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-09-26 21:51:16,039 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-09-26 21:51:16,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:16,039 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-09-26 21:51:16,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:51:16,039 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-09-26 21:51:16,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-26 21:51:16,040 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:16,040 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-09-26 21:51:16,040 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:16,040 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:16,040 INFO L82 PathProgramCache]: Analyzing trace with hash -858967839, now seen corresponding path program 58 times [2018-09-26 21:51:16,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:16,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:16,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:16,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:16,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:16,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:16,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:51:16,422 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:51:16,500 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:51:16,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:16,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:16,798 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:16,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-09-26 21:51:16,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:51:16,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:51:16,799 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:16,799 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-09-26 21:51:18,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:18,534 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-09-26 21:51:18,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:51:18,534 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-09-26 21:51:18,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:18,535 INFO L225 Difference]: With dead ends: 133 [2018-09-26 21:51:18,535 INFO L226 Difference]: Without dead ends: 131 [2018-09-26 21:51:18,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:18,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-26 21:51:18,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-09-26 21:51:18,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-26 21:51:18,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-09-26 21:51:18,558 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-09-26 21:51:18,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:18,558 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-09-26 21:51:18,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:51:18,558 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-09-26 21:51:18,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-26 21:51:18,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:18,558 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-09-26 21:51:18,559 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:18,559 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:18,559 INFO L82 PathProgramCache]: Analyzing trace with hash -834439203, now seen corresponding path program 59 times [2018-09-26 21:51:18,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:18,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:18,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:18,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:18,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:19,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:19,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:51:19,404 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:51:19,508 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-26 21:51:19,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:19,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:19,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:19,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-26 21:51:19,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:51:19,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:51:19,824 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:19,825 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 64 states. [2018-09-26 21:51:24,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:24,070 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-09-26 21:51:24,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:51:24,071 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-26 21:51:24,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:24,071 INFO L225 Difference]: With dead ends: 194 [2018-09-26 21:51:24,071 INFO L226 Difference]: Without dead ends: 129 [2018-09-26 21:51:24,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:24,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-26 21:51:24,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-26 21:51:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-26 21:51:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-09-26 21:51:24,094 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-09-26 21:51:24,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:24,094 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-09-26 21:51:24,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:51:24,095 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-09-26 21:51:24,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-26 21:51:24,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:24,095 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-09-26 21:51:24,096 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:24,096 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:24,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1096867561, now seen corresponding path program 60 times [2018-09-26 21:51:24,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:24,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:24,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:24,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:24,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:24,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:24,472 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:51:24,480 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:51:24,582 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-26 21:51:24,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:24,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:24,890 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:24,890 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-09-26 21:51:24,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:51:24,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:51:24,891 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:24,891 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-09-26 21:51:26,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:26,645 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-09-26 21:51:26,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:51:26,646 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-09-26 21:51:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:26,646 INFO L225 Difference]: With dead ends: 137 [2018-09-26 21:51:26,646 INFO L226 Difference]: Without dead ends: 135 [2018-09-26 21:51:26,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-26 21:51:26,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-09-26 21:51:26,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-26 21:51:26,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-26 21:51:26,671 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-09-26 21:51:26,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:26,671 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-26 21:51:26,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:51:26,671 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-26 21:51:26,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-26 21:51:26,671 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:26,671 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-26 21:51:26,672 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:26,672 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:26,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1822805357, now seen corresponding path program 61 times [2018-09-26 21:51:26,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:26,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:26,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:26,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:26,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:27,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:27,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:51:27,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:51:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:27,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:27,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:27,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-26 21:51:27,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:51:27,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:51:27,995 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:27,995 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 66 states. [2018-09-26 21:51:36,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:36,548 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-09-26 21:51:36,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:51:36,548 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-26 21:51:36,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:36,549 INFO L225 Difference]: With dead ends: 200 [2018-09-26 21:51:36,549 INFO L226 Difference]: Without dead ends: 133 [2018-09-26 21:51:36,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:36,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-26 21:51:36,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-26 21:51:36,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-26 21:51:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-09-26 21:51:36,573 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-09-26 21:51:36,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:36,574 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-09-26 21:51:36,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:51:36,574 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-09-26 21:51:36,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-26 21:51:36,575 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:36,575 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-09-26 21:51:36,575 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:36,575 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:36,575 INFO L82 PathProgramCache]: Analyzing trace with hash 787132109, now seen corresponding path program 62 times [2018-09-26 21:51:36,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:36,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:36,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:36,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:51:36,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:37,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:37,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:51:37,081 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:51:37,155 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:51:37,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:37,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:37,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:37,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-09-26 21:51:37,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:51:37,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:51:37,726 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:37,726 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-09-26 21:51:39,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:39,555 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-09-26 21:51:39,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:51:39,555 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-09-26 21:51:39,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:39,556 INFO L225 Difference]: With dead ends: 141 [2018-09-26 21:51:39,556 INFO L226 Difference]: Without dead ends: 139 [2018-09-26 21:51:39,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:39,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-26 21:51:39,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-09-26 21:51:39,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-26 21:51:39,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-09-26 21:51:39,582 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-09-26 21:51:39,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:39,582 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-09-26 21:51:39,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:51:39,582 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-09-26 21:51:39,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-26 21:51:39,583 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:39,583 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-09-26 21:51:39,583 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:39,583 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:39,584 INFO L82 PathProgramCache]: Analyzing trace with hash 519645897, now seen corresponding path program 63 times [2018-09-26 21:51:39,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:39,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:39,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:39,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:39,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:40,497 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:40,497 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-26 21:51:40,509 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:51:40,616 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-26 21:51:40,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:40,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:41,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:41,092 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-26 21:51:41,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:51:41,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:51:41,093 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:41,093 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 68 states. [2018-09-26 21:51:50,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:50,247 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-09-26 21:51:50,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:51:50,247 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-26 21:51:50,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:50,248 INFO L225 Difference]: With dead ends: 206 [2018-09-26 21:51:50,248 INFO L226 Difference]: Without dead ends: 137 [2018-09-26 21:51:50,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-26 21:51:50,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-26 21:51:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-26 21:51:50,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-09-26 21:51:50,273 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-09-26 21:51:50,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:50,273 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-09-26 21:51:50,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:51:50,274 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-09-26 21:51:50,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-26 21:51:50,274 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:50,274 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-09-26 21:51:50,275 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:50,275 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:50,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1226635779, now seen corresponding path program 64 times [2018-09-26 21:51:50,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:50,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:50,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:50,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:50,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:50,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:50,663 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:51:50,670 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:51:50,751 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:51:50,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:50,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:51,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:51,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-09-26 21:51:51,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:51:51,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:51:51,350 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:51,350 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-09-26 21:51:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:53,272 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-09-26 21:51:53,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:51:53,272 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-09-26 21:51:53,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:53,273 INFO L225 Difference]: With dead ends: 145 [2018-09-26 21:51:53,273 INFO L226 Difference]: Without dead ends: 143 [2018-09-26 21:51:53,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:53,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-26 21:51:53,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-09-26 21:51:53,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-26 21:51:53,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-09-26 21:51:53,308 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-09-26 21:51:53,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:53,308 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-09-26 21:51:53,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:51:53,309 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-09-26 21:51:53,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-26 21:51:53,309 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:53,310 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-09-26 21:51:53,310 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:53,310 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:53,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1975877759, now seen corresponding path program 65 times [2018-09-26 21:51:53,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:53,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:53,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:53,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:53,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:54,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:54,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:51:54,270 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:51:54,380 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-26 21:51:54,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:54,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:54,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:54,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-26 21:51:54,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:51:54,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:51:54,726 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:54,726 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 70 states. [2018-09-26 21:52:04,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:52:04,255 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-09-26 21:52:04,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:52:04,255 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-26 21:52:04,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:52:04,256 INFO L225 Difference]: With dead ends: 212 [2018-09-26 21:52:04,256 INFO L226 Difference]: Without dead ends: 141 [2018-09-26 21:52:04,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:52:04,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-26 21:52:04,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-26 21:52:04,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-26 21:52:04,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-09-26 21:52:04,283 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-09-26 21:52:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:52:04,283 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-09-26 21:52:04,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:52:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-09-26 21:52:04,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-26 21:52:04,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:52:04,284 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-09-26 21:52:04,284 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:52:04,285 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:52:04,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1050354361, now seen corresponding path program 66 times [2018-09-26 21:52:04,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:52:04,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:52:04,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:04,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:52:04,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:52:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:52:04,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:52:04,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:52:04,725 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:52:04,839 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-09-26 21:52:04,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:52:04,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:52:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:52:05,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:52:05,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-09-26 21:52:05,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:52:05,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:52:05,163 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:52:05,163 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-09-26 21:52:07,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:52:07,238 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-09-26 21:52:07,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:52:07,238 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-09-26 21:52:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:52:07,239 INFO L225 Difference]: With dead ends: 149 [2018-09-26 21:52:07,239 INFO L226 Difference]: Without dead ends: 147 [2018-09-26 21:52:07,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:52:07,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-26 21:52:07,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-09-26 21:52:07,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-26 21:52:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-09-26 21:52:07,268 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-09-26 21:52:07,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:52:07,268 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-09-26 21:52:07,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:52:07,268 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-09-26 21:52:07,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-26 21:52:07,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:52:07,269 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-09-26 21:52:07,269 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:52:07,269 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:52:07,269 INFO L82 PathProgramCache]: Analyzing trace with hash 73159605, now seen corresponding path program 67 times [2018-09-26 21:52:07,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:52:07,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:52:07,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:07,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:52:07,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:52:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:52:08,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:52:08,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:52:08,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:52:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:52:08,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:52:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:52:08,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:52:08,614 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-26 21:52:08,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:52:08,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:52:08,615 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:52:08,615 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 72 states. [2018-09-26 21:52:18,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:52:18,876 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-09-26 21:52:18,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:52:18,876 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-26 21:52:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:52:18,877 INFO L225 Difference]: With dead ends: 218 [2018-09-26 21:52:18,877 INFO L226 Difference]: Without dead ends: 145 [2018-09-26 21:52:18,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:52:18,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-26 21:52:18,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-26 21:52:18,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-26 21:52:18,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-09-26 21:52:18,909 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-09-26 21:52:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:52:18,910 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-09-26 21:52:18,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:52:18,910 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-09-26 21:52:18,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-26 21:52:18,911 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:52:18,911 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-09-26 21:52:18,911 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:52:18,911 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:52:18,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1220692207, now seen corresponding path program 68 times [2018-09-26 21:52:18,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:52:18,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:52:18,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:18,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:52:18,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:52:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:52:19,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:52:19,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:52:19,493 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:52:19,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:52:19,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:52:19,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:52:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:52:19,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:52:19,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-09-26 21:52:19,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:52:19,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:52:19,914 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:52:19,914 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2018-09-26 21:52:21,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:52:21,742 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-09-26 21:52:21,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:52:21,743 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2018-09-26 21:52:21,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:52:21,743 INFO L225 Difference]: With dead ends: 153 [2018-09-26 21:52:21,744 INFO L226 Difference]: Without dead ends: 151 [2018-09-26 21:52:21,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:52:21,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-26 21:52:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-09-26 21:52:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-26 21:52:21,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-09-26 21:52:21,778 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-09-26 21:52:21,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:52:21,778 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-09-26 21:52:21,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:52:21,778 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-09-26 21:52:21,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-26 21:52:21,779 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:52:21,779 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-09-26 21:52:21,779 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:52:21,780 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:52:21,780 INFO L82 PathProgramCache]: Analyzing trace with hash 559072363, now seen corresponding path program 69 times [2018-09-26 21:52:21,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:52:21,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:52:21,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:21,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:52:21,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:52:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:52:22,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:52:22,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:52:22,858 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:52:22,987 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-26 21:52:22,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:52:22,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:52:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:52:23,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:52:23,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-26 21:52:23,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:52:23,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:52:23,350 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:52:23,350 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 74 states. [2018-09-26 21:52:34,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:52:34,293 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2018-09-26 21:52:34,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:52:34,293 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-26 21:52:34,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:52:34,294 INFO L225 Difference]: With dead ends: 224 [2018-09-26 21:52:34,294 INFO L226 Difference]: Without dead ends: 149 [2018-09-26 21:52:34,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:52:34,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-26 21:52:34,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-26 21:52:34,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-26 21:52:34,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-09-26 21:52:34,329 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-09-26 21:52:34,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:52:34,329 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-09-26 21:52:34,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:52:34,329 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-09-26 21:52:34,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-26 21:52:34,330 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:52:34,330 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-09-26 21:52:34,330 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:52:34,331 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:52:34,331 INFO L82 PathProgramCache]: Analyzing trace with hash 719817893, now seen corresponding path program 70 times [2018-09-26 21:52:34,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:52:34,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:52:34,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:34,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:52:34,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:52:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:52:34,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:52:34,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:52:34,807 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:52:34,898 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:52:34,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:52:34,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:52:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:52:35,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:52:35,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-09-26 21:52:35,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:52:35,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:52:35,285 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:52:35,285 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-09-26 21:52:37,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:52:37,460 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-09-26 21:52:37,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:52:37,461 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-09-26 21:52:37,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:52:37,462 INFO L225 Difference]: With dead ends: 157 [2018-09-26 21:52:37,462 INFO L226 Difference]: Without dead ends: 155 [2018-09-26 21:52:37,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:52:37,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-26 21:52:37,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2018-09-26 21:52:37,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-26 21:52:37,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-09-26 21:52:37,495 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2018-09-26 21:52:37,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:52:37,495 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-09-26 21:52:37,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:52:37,495 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-09-26 21:52:37,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-26 21:52:37,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:52:37,496 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-09-26 21:52:37,496 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:52:37,496 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:52:37,497 INFO L82 PathProgramCache]: Analyzing trace with hash 255193761, now seen corresponding path program 71 times [2018-09-26 21:52:37,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:52:37,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:52:37,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:37,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:52:37,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:52:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:52:38,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:52:38,523 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:52:38,530 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:52:38,657 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-26 21:52:38,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:52:38,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:52:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:52:39,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:52:39,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-26 21:52:39,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:52:39,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:52:39,100 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:52:39,100 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 76 states. Received shutdown request... [2018-09-26 21:52:39,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:52:39,722 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:52:39,727 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:52:39,727 INFO L202 PluginConnector]: Adding new model down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:52:39 BoogieIcfgContainer [2018-09-26 21:52:39,727 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:52:39,728 INFO L168 Benchmark]: Toolchain (without parser) took 239533.78 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -155.2 MB). Free memory was 1.5 GB in the beginning and 999.7 MB in the end (delta: 460.7 MB). Peak memory consumption was 305.5 MB. Max. memory is 7.1 GB. [2018-09-26 21:52:39,729 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:52:39,730 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.75 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:52:39,730 INFO L168 Benchmark]: Boogie Preprocessor took 20.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:52:39,731 INFO L168 Benchmark]: RCFGBuilder took 347.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:52:39,731 INFO L168 Benchmark]: TraceAbstraction took 239120.16 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -155.2 MB). Free memory was 1.4 GB in the beginning and 999.7 MB in the end (delta: 439.5 MB). Peak memory consumption was 284.3 MB. Max. memory is 7.1 GB. [2018-09-26 21:52:39,735 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 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.75 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 347.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 239120.16 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -155.2 MB). Free memory was 1.4 GB in the beginning and 999.7 MB in the end (delta: 439.5 MB). Peak memory consumption was 284.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was constructing difference of abstraction (151states) and FLOYD_HOARE automaton (currently 41 states, 76 states before enhancement), while ReachableStatesComputation was computing reachable states (79 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 239.0s OverallTime, 73 OverallIterations, 37 TraceHistogramMax, 174.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 994 SDtfs, 734 SDslu, 4387 SDs, 0 SdLazy, 35438 SolverSat, 3091 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 39.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9861 GetRequests, 6277 SyntacticMatches, 0 SemanticMatches, 3584 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=151occurred in iteration=72, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 72 MinimizatonAttempts, 144 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 4.1s SatisfiabilityAnalysisTime, 55.2s InterpolantComputationTime, 11374 NumberOfCodeBlocks, 11374 NumberOfCodeBlocksAsserted, 833 NumberOfCheckSat, 11230 ConstructedInterpolants, 0 QuantifiedInterpolants, 3365607 SizeOfPredicates, 213 NumberOfNonLiveVariables, 22366 ConjunctsInSsa, 3016 ConjunctsInUnsatCore, 144 InterpolantComputations, 2 PerfectInterpolantSequences, 67486/132310 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/down.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-52-39-746.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-52-39-746.csv Completed graceful shutdown