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.epf -i ../../../trunk/examples/programs/real-life/GateController.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:30:51,313 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:30:51,315 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:30:51,327 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:30:51,328 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:30:51,329 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:30:51,330 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:30:51,332 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:30:51,334 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:30:51,335 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:30:51,336 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 19:30:51,361 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:30:51,377 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:30:51,377 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:30:51,378 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:30:51,379 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:30:51,379 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:30:51,379 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:30:51,380 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:30:51,380 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:30:51,380 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:30:51,380 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:30:51,381 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:30:51,381 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:30:51,381 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:30:51,381 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:30:51,381 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:30:51,382 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:30:51,382 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:30:51,382 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:30:51,382 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:30:51,382 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:30:51,383 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:30:51,383 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:30:51,383 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:30:51,383 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:30:51,383 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:30:51,384 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:30:51,384 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:30:51,384 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:30:51,384 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:30:51,384 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:30:51,437 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:30:51,451 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:30:51,454 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:30:51,456 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:30:51,457 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:30:51,458 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/GateController.bpl [2018-09-23 19:30:51,458 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/GateController.bpl' [2018-09-23 19:30:51,514 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:30:51,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:30:51,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:30:51,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:30:51,519 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:30:51,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/1) ... [2018-09-23 19:30:51,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/1) ... [2018-09-23 19:30:51,562 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 19:30:51,562 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 19:30:51,562 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 19:30:51,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:30:51,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:30:51,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:30:51,566 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:30:51,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/1) ... [2018-09-23 19:30:51,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/1) ... [2018-09-23 19:30:51,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/1) ... [2018-09-23 19:30:51,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/1) ... [2018-09-23 19:30:51,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/1) ... [2018-09-23 19:30:51,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/1) ... [2018-09-23 19:30:51,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/1) ... [2018-09-23 19:30:51,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:30:51,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:30:51,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:30:51,596 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:30:51,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (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 [2018-09-23 19:30:51,678 INFO L124 BoogieDeclarations]: Specification and implementation of procedure GateController given in one single declaration [2018-09-23 19:30:51,678 INFO L130 BoogieDeclarations]: Found specification of procedure GateController [2018-09-23 19:30:51,679 INFO L138 BoogieDeclarations]: Found implementation of procedure GateController [2018-09-23 19:30:52,000 INFO L351 CfgBuilder]: Using library mode [2018-09-23 19:30:52,000 INFO L202 PluginConnector]: Adding new model GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:30:52 BoogieIcfgContainer [2018-09-23 19:30:52,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:30:52,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:30:52,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:30:52,005 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:30:52,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/2) ... [2018-09-23 19:30:52,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c08cf2 and model type GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:30:52, skipping insertion in model container [2018-09-23 19:30:52,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:30:52" (2/2) ... [2018-09-23 19:30:52,010 INFO L112 eAbstractionObserver]: Analyzing ICFG GateController.bpl [2018-09-23 19:30:52,023 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:30:52,037 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:30:52,087 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:30:52,088 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:30:52,088 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:30:52,088 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:30:52,088 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:30:52,089 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:30:52,089 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:30:52,089 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:30:52,089 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:30:52,105 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-09-23 19:30:52,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 19:30:52,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:52,113 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 19:30:52,116 INFO L423 AbstractCegarLoop]: === Iteration 1 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:52,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:52,123 INFO L82 PathProgramCache]: Analyzing trace with hash 30432, now seen corresponding path program 1 times [2018-09-23 19:30:52,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:52,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:52,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:52,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:30:52,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:52,272 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:30:52,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 19:30:52,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:30:52,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:30:52,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:30:52,294 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-09-23 19:30:52,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:30:52,396 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2018-09-23 19:30:52,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:30:52,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-23 19:30:52,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:30:52,418 INFO L225 Difference]: With dead ends: 19 [2018-09-23 19:30:52,418 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 19:30:52,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:30:52,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 19:30:52,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-09-23 19:30:52,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 19:30:52,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2018-09-23 19:30:52,480 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 3 [2018-09-23 19:30:52,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:30:52,480 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2018-09-23 19:30:52,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:30:52,480 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2018-09-23 19:30:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:30:52,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:52,481 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:30:52,481 INFO L423 AbstractCegarLoop]: === Iteration 2 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:52,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:52,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1953617644, now seen corresponding path program 1 times [2018-09-23 19:30:52,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:52,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:52,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:52,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:30:52,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:52,580 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:30:52,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:30:52,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:30:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:52,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:30:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:52,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:30:52,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-09-23 19:30:52,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:30:52,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:30:52,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:30:52,908 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 8 states. [2018-09-23 19:30:53,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:30:53,030 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2018-09-23 19:30:53,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:30:53,031 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-23 19:30:53,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:30:53,032 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:30:53,032 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 19:30:53,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:30:53,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 19:30:53,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-09-23 19:30:53,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:30:53,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2018-09-23 19:30:53,038 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2018-09-23 19:30:53,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:30:53,039 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2018-09-23 19:30:53,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:30:53,039 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2018-09-23 19:30:53,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:30:53,040 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:53,040 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:30:53,040 INFO L423 AbstractCegarLoop]: === Iteration 3 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:53,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:53,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1953558062, now seen corresponding path program 1 times [2018-09-23 19:30:53,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:53,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:53,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:53,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:30:53,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:53,101 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:30:53,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 19:30:53,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:30:53,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:30:53,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:30:53,102 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 3 states. [2018-09-23 19:30:53,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:30:53,119 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2018-09-23 19:30:53,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:30:53,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-09-23 19:30:53,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:30:53,120 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:30:53,120 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 19:30:53,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:30:53,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 19:30:53,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 19:30:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:30:53,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-23 19:30:53,125 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2018-09-23 19:30:53,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:30:53,126 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-23 19:30:53,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:30:53,126 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-23 19:30:53,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:30:53,127 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:53,127 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2018-09-23 19:30:53,127 INFO L423 AbstractCegarLoop]: === Iteration 4 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:53,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:53,128 INFO L82 PathProgramCache]: Analyzing trace with hash 72785504, now seen corresponding path program 2 times [2018-09-23 19:30:53,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:53,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:53,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:53,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:30:53,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:53,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:30:53,410 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 [2018-09-23 19:30:53,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:30:53,468 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:30:53,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:30:53,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:30:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:53,751 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:30:53,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-23 19:30:53,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:30:53,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:30:53,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:30:53,753 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 12 states. [2018-09-23 19:30:53,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:30:53,936 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2018-09-23 19:30:53,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:30:53,937 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2018-09-23 19:30:53,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:30:53,938 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:30:53,939 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:30:53,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:30:53,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:30:53,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-09-23 19:30:53,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:30:53,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2018-09-23 19:30:53,945 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2018-09-23 19:30:53,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:30:53,946 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2018-09-23 19:30:53,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:30:53,946 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2018-09-23 19:30:53,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:30:53,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:53,947 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1] [2018-09-23 19:30:53,948 INFO L423 AbstractCegarLoop]: === Iteration 5 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:53,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:53,948 INFO L82 PathProgramCache]: Analyzing trace with hash 491282284, now seen corresponding path program 3 times [2018-09-23 19:30:53,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:53,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:53,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:53,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:30:53,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:54,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:30:54,101 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 [2018-09-23 19:30:54,117 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:30:54,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 19:30:54,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:30:54,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:30:54,644 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-23 19:30:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:54,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:30:54,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-09-23 19:30:54,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:30:54,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:30:54,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:30:54,791 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 16 states. [2018-09-23 19:30:54,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:30:54,904 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2018-09-23 19:30:54,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:30:54,907 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-23 19:30:54,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:30:54,908 INFO L225 Difference]: With dead ends: 30 [2018-09-23 19:30:54,908 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 19:30:54,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:30:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 19:30:54,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2018-09-23 19:30:54,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:30:54,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-09-23 19:30:54,915 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 18 [2018-09-23 19:30:54,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:30:54,915 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-09-23 19:30:54,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:30:54,915 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-09-23 19:30:54,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 19:30:54,916 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:54,916 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1] [2018-09-23 19:30:54,917 INFO L423 AbstractCegarLoop]: === Iteration 6 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:54,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:54,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1589732832, now seen corresponding path program 4 times [2018-09-23 19:30:54,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:54,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:54,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:54,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:30:54,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:55,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:30:55,121 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 [2018-09-23 19:30:55,136 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:30:55,162 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:30:55,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:30:55,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:30:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:55,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:30:55,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-23 19:30:55,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:30:55,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:30:55,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:30:55,530 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 20 states. [2018-09-23 19:30:55,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:30:55,865 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-09-23 19:30:55,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:30:55,866 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2018-09-23 19:30:55,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:30:55,867 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:30:55,867 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:30:55,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:30:55,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:30:55,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2018-09-23 19:30:55,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 19:30:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2018-09-23 19:30:55,884 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 23 [2018-09-23 19:30:55,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:30:55,885 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2018-09-23 19:30:55,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:30:55,885 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2018-09-23 19:30:55,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 19:30:55,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:55,889 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1] [2018-09-23 19:30:55,889 INFO L423 AbstractCegarLoop]: === Iteration 7 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:55,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:55,890 INFO L82 PathProgramCache]: Analyzing trace with hash 602818540, now seen corresponding path program 5 times [2018-09-23 19:30:55,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:55,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:55,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:55,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:30:55,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:56,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:30:56,202 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 [2018-09-23 19:30:56,210 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:30:56,227 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 19:30:56,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:30:56,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:30:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:57,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:30:57,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-09-23 19:30:57,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:30:57,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:30:57,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:30:57,017 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 24 states. [2018-09-23 19:30:57,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:30:57,151 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2018-09-23 19:30:57,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:30:57,153 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2018-09-23 19:30:57,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:30:57,153 INFO L225 Difference]: With dead ends: 40 [2018-09-23 19:30:57,154 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 19:30:57,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:30:57,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 19:30:57,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2018-09-23 19:30:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:30:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2018-09-23 19:30:57,161 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 28 [2018-09-23 19:30:57,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:30:57,161 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2018-09-23 19:30:57,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:30:57,162 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2018-09-23 19:30:57,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:30:57,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:57,163 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1] [2018-09-23 19:30:57,163 INFO L423 AbstractCegarLoop]: === Iteration 8 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:57,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:57,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1979239776, now seen corresponding path program 6 times [2018-09-23 19:30:57,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:57,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:57,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:57,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:30:57,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:57,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:57,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:30:57,366 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 [2018-09-23 19:30:57,374 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:30:57,390 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:30:57,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:30:57,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:30:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:57,950 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:30:57,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2018-09-23 19:30:57,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:30:57,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:30:57,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=528, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:30:57,952 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 28 states. [2018-09-23 19:30:58,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:30:58,136 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2018-09-23 19:30:58,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:30:58,139 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2018-09-23 19:30:58,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:30:58,140 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:30:58,140 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:30:58,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=528, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:30:58,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:30:58,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-09-23 19:30:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 19:30:58,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2018-09-23 19:30:58,148 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 33 [2018-09-23 19:30:58,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:30:58,148 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2018-09-23 19:30:58,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:30:58,149 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2018-09-23 19:30:58,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:30:58,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:58,150 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1] [2018-09-23 19:30:58,150 INFO L423 AbstractCegarLoop]: === Iteration 9 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:58,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:58,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1800695700, now seen corresponding path program 7 times [2018-09-23 19:30:58,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:58,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:58,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:58,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:30:58,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:58,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:30:58,483 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 [2018-09-23 19:30:58,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:30:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:58,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:30:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:59,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:30:59,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-09-23 19:30:59,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:30:59,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:30:59,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=699, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:30:59,091 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 32 states. [2018-09-23 19:30:59,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:30:59,243 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2018-09-23 19:30:59,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:30:59,244 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 38 [2018-09-23 19:30:59,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:30:59,245 INFO L225 Difference]: With dead ends: 50 [2018-09-23 19:30:59,245 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 19:30:59,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=293, Invalid=699, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:30:59,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 19:30:59,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2018-09-23 19:30:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 19:30:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2018-09-23 19:30:59,254 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 38 [2018-09-23 19:30:59,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:30:59,255 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2018-09-23 19:30:59,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:30:59,255 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2018-09-23 19:30:59,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 19:30:59,256 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:59,256 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1] [2018-09-23 19:30:59,257 INFO L423 AbstractCegarLoop]: === Iteration 10 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:59,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:59,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1430989600, now seen corresponding path program 8 times [2018-09-23 19:30:59,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:59,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:59,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:59,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:30:59,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:59,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:30:59,673 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 [2018-09-23 19:30:59,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:30:59,703 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:30:59,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:30:59,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:00,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:00,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2018-09-23 19:31:00,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:31:00,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:31:00,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:31:00,348 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 36 states. [2018-09-23 19:31:00,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:00,596 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2018-09-23 19:31:00,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:31:00,597 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2018-09-23 19:31:00,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:00,598 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:31:00,598 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:31:00,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:31:00,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:31:00,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2018-09-23 19:31:00,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 19:31:00,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2018-09-23 19:31:00,606 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 43 [2018-09-23 19:31:00,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:00,607 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2018-09-23 19:31:00,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:31:00,607 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2018-09-23 19:31:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 19:31:00,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:00,609 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1] [2018-09-23 19:31:00,609 INFO L423 AbstractCegarLoop]: === Iteration 11 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:00,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:00,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1043842836, now seen corresponding path program 9 times [2018-09-23 19:31:00,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:00,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:00,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:00,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:00,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:00,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:00,930 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 [2018-09-23 19:31:00,938 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:31:00,961 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-23 19:31:00,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:00,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:02,021 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:02,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2018-09-23 19:31:02,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:31:02,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:31:02,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:31:02,023 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 40 states. [2018-09-23 19:31:02,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:02,261 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2018-09-23 19:31:02,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:31:02,261 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2018-09-23 19:31:02,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:02,262 INFO L225 Difference]: With dead ends: 60 [2018-09-23 19:31:02,262 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 19:31:02,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:31:02,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 19:31:02,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2018-09-23 19:31:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 19:31:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2018-09-23 19:31:02,269 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 48 [2018-09-23 19:31:02,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:02,270 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2018-09-23 19:31:02,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:31:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2018-09-23 19:31:02,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 19:31:02,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:02,271 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1] [2018-09-23 19:31:02,271 INFO L423 AbstractCegarLoop]: === Iteration 12 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:02,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:02,271 INFO L82 PathProgramCache]: Analyzing trace with hash -676496288, now seen corresponding path program 10 times [2018-09-23 19:31:02,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:02,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:02,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:02,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:02,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:02,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:02,564 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 [2018-09-23 19:31:02,572 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:31:02,612 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:31:02,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:02,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:03,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:03,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2018-09-23 19:31:03,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:31:03,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:31:03,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=1356, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:31:03,440 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 44 states. [2018-09-23 19:31:03,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:03,767 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2018-09-23 19:31:03,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:31:03,767 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 53 [2018-09-23 19:31:03,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:03,769 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:31:03,769 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 19:31:03,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=536, Invalid=1356, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:31:03,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 19:31:03,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-09-23 19:31:03,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 19:31:03,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2018-09-23 19:31:03,776 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 53 [2018-09-23 19:31:03,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:03,776 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2018-09-23 19:31:03,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:31:03,776 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2018-09-23 19:31:03,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 19:31:03,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:03,777 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1] [2018-09-23 19:31:03,778 INFO L423 AbstractCegarLoop]: === Iteration 13 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:03,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:03,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1014218388, now seen corresponding path program 11 times [2018-09-23 19:31:03,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:03,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:03,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:03,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:03,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:04,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:04,132 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 [2018-09-23 19:31:04,140 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:31:04,165 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-23 19:31:04,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:04,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:05,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:05,612 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2018-09-23 19:31:05,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:31:05,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:31:05,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=1623, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:31:05,615 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 48 states. [2018-09-23 19:31:05,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:05,824 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2018-09-23 19:31:05,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:31:05,824 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 58 [2018-09-23 19:31:05,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:05,825 INFO L225 Difference]: With dead ends: 70 [2018-09-23 19:31:05,825 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 19:31:05,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=633, Invalid=1623, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:31:05,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 19:31:05,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2018-09-23 19:31:05,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 19:31:05,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2018-09-23 19:31:05,833 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 58 [2018-09-23 19:31:05,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:05,833 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2018-09-23 19:31:05,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:31:05,833 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2018-09-23 19:31:05,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 19:31:05,834 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:05,835 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1] [2018-09-23 19:31:05,835 INFO L423 AbstractCegarLoop]: === Iteration 14 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:05,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:05,835 INFO L82 PathProgramCache]: Analyzing trace with hash -778386464, now seen corresponding path program 12 times [2018-09-23 19:31:05,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:05,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:05,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:05,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:05,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:06,605 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:06,605 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 [2018-09-23 19:31:06,614 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:31:06,707 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 19:31:06,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:06,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:07,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:07,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2018-09-23 19:31:07,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:31:07,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:31:07,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=1914, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:31:07,929 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 52 states. [2018-09-23 19:31:08,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:08,145 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2018-09-23 19:31:08,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:31:08,145 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 63 [2018-09-23 19:31:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:08,146 INFO L225 Difference]: With dead ends: 75 [2018-09-23 19:31:08,147 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 19:31:08,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=738, Invalid=1914, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:31:08,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 19:31:08,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-09-23 19:31:08,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 19:31:08,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2018-09-23 19:31:08,154 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 63 [2018-09-23 19:31:08,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:08,154 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2018-09-23 19:31:08,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:31:08,155 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2018-09-23 19:31:08,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 19:31:08,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:08,156 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1] [2018-09-23 19:31:08,156 INFO L423 AbstractCegarLoop]: === Iteration 15 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:08,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:08,156 INFO L82 PathProgramCache]: Analyzing trace with hash -130045460, now seen corresponding path program 13 times [2018-09-23 19:31:08,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:08,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:08,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:08,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:08,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:08,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:08,693 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 [2018-09-23 19:31:08,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:08,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:10,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:10,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 55 [2018-09-23 19:31:10,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:31:10,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:31:10,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=851, Invalid=2229, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:31:10,238 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 56 states. [2018-09-23 19:31:10,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:10,446 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2018-09-23 19:31:10,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:31:10,447 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 68 [2018-09-23 19:31:10,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:10,448 INFO L225 Difference]: With dead ends: 80 [2018-09-23 19:31:10,448 INFO L226 Difference]: Without dead ends: 78 [2018-09-23 19:31:10,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=851, Invalid=2229, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:31:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-23 19:31:10,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2018-09-23 19:31:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 19:31:10,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2018-09-23 19:31:10,455 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 68 [2018-09-23 19:31:10,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:10,456 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2018-09-23 19:31:10,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:31:10,456 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2018-09-23 19:31:10,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 19:31:10,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:10,457 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1] [2018-09-23 19:31:10,457 INFO L423 AbstractCegarLoop]: === Iteration 16 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:10,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:10,458 INFO L82 PathProgramCache]: Analyzing trace with hash -415978656, now seen corresponding path program 14 times [2018-09-23 19:31:10,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:10,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:10,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:10,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:10,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:10,950 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:10,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:10,951 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 [2018-09-23 19:31:10,969 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:31:11,004 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:31:11,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:11,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:11,949 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:11,949 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 59 [2018-09-23 19:31:11,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:31:11,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:31:11,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=972, Invalid=2568, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:31:11,951 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 60 states. [2018-09-23 19:31:12,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:12,254 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2018-09-23 19:31:12,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:31:12,254 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 73 [2018-09-23 19:31:12,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:12,255 INFO L225 Difference]: With dead ends: 85 [2018-09-23 19:31:12,255 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 19:31:12,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=972, Invalid=2568, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:31:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 19:31:12,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-09-23 19:31:12,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 19:31:12,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2018-09-23 19:31:12,263 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 73 [2018-09-23 19:31:12,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:12,263 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2018-09-23 19:31:12,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:31:12,263 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2018-09-23 19:31:12,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 19:31:12,264 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:12,264 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1] [2018-09-23 19:31:12,265 INFO L423 AbstractCegarLoop]: === Iteration 17 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:12,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:12,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2077592980, now seen corresponding path program 15 times [2018-09-23 19:31:12,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:12,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:12,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:12,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:12,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:12,757 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:12,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:31:12,764 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:31:12,791 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-23 19:31:12,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:12,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:13,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:13,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-09-23 19:31:13,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 19:31:13,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 19:31:13,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1101, Invalid=2931, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:31:13,715 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 64 states. [2018-09-23 19:31:14,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:14,147 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2018-09-23 19:31:14,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:31:14,157 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 78 [2018-09-23 19:31:14,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:14,158 INFO L225 Difference]: With dead ends: 90 [2018-09-23 19:31:14,158 INFO L226 Difference]: Without dead ends: 88 [2018-09-23 19:31:14,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1101, Invalid=2931, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:31:14,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-23 19:31:14,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2018-09-23 19:31:14,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-23 19:31:14,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2018-09-23 19:31:14,169 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 78 [2018-09-23 19:31:14,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:14,169 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2018-09-23 19:31:14,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 19:31:14,169 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2018-09-23 19:31:14,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 19:31:14,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:14,177 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1] [2018-09-23 19:31:14,177 INFO L423 AbstractCegarLoop]: === Iteration 18 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:14,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:14,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1630745312, now seen corresponding path program 16 times [2018-09-23 19:31:14,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:14,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:14,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:14,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:14,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:14,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:14,673 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 [2018-09-23 19:31:14,681 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:31:14,702 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:31:14,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:14,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:16,168 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:16,189 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:16,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 67 [2018-09-23 19:31:16,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 19:31:16,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 19:31:16,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1238, Invalid=3318, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:31:16,192 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 68 states. [2018-09-23 19:31:16,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:16,620 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2018-09-23 19:31:16,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:31:16,621 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 83 [2018-09-23 19:31:16,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:16,622 INFO L225 Difference]: With dead ends: 95 [2018-09-23 19:31:16,622 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 19:31:16,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1238, Invalid=3318, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:31:16,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 19:31:16,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-09-23 19:31:16,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 19:31:16,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2018-09-23 19:31:16,631 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 83 [2018-09-23 19:31:16,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:16,631 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2018-09-23 19:31:16,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 19:31:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2018-09-23 19:31:16,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 19:31:16,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:16,633 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1] [2018-09-23 19:31:16,633 INFO L423 AbstractCegarLoop]: === Iteration 19 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:16,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:16,633 INFO L82 PathProgramCache]: Analyzing trace with hash -778790164, now seen corresponding path program 17 times [2018-09-23 19:31:16,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:16,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:16,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:16,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:16,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:18,015 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:18,015 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 [2018-09-23 19:31:18,025 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:31:18,052 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-23 19:31:18,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:18,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:19,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:19,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 71 [2018-09-23 19:31:19,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 19:31:19,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 19:31:19,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=3729, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:31:19,198 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 72 states. [2018-09-23 19:31:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:19,477 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2018-09-23 19:31:19,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:31:19,478 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 88 [2018-09-23 19:31:19,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:19,478 INFO L225 Difference]: With dead ends: 100 [2018-09-23 19:31:19,479 INFO L226 Difference]: Without dead ends: 98 [2018-09-23 19:31:19,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2736 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1383, Invalid=3729, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:31:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-23 19:31:19,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2018-09-23 19:31:19,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 19:31:19,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2018-09-23 19:31:19,485 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 88 [2018-09-23 19:31:19,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:19,486 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2018-09-23 19:31:19,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 19:31:19,486 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2018-09-23 19:31:19,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-23 19:31:19,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:19,487 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1] [2018-09-23 19:31:19,487 INFO L423 AbstractCegarLoop]: === Iteration 20 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:19,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:19,487 INFO L82 PathProgramCache]: Analyzing trace with hash 38689376, now seen corresponding path program 18 times [2018-09-23 19:31:19,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:19,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:19,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:19,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:19,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:20,436 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:20,436 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 [2018-09-23 19:31:20,444 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:31:20,496 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 19:31:20,496 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:20,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:21,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:21,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 75 [2018-09-23 19:31:21,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 19:31:21,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 19:31:21,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1536, Invalid=4164, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:31:21,638 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 76 states. [2018-09-23 19:31:21,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:21,878 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2018-09-23 19:31:21,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:31:21,878 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 93 [2018-09-23 19:31:21,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:21,879 INFO L225 Difference]: With dead ends: 105 [2018-09-23 19:31:21,880 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 19:31:21,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3068 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1536, Invalid=4164, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:31:21,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 19:31:21,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-09-23 19:31:21,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 19:31:21,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2018-09-23 19:31:21,884 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 93 [2018-09-23 19:31:21,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:21,885 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2018-09-23 19:31:21,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 19:31:21,885 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2018-09-23 19:31:21,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 19:31:21,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:21,886 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1] [2018-09-23 19:31:21,886 INFO L423 AbstractCegarLoop]: === Iteration 21 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:21,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:21,886 INFO L82 PathProgramCache]: Analyzing trace with hash 281420652, now seen corresponding path program 19 times [2018-09-23 19:31:21,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:21,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:21,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:21,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:21,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:22,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:22,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:31:22,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:22,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:23,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:23,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 79 [2018-09-23 19:31:23,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 19:31:23,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 19:31:23,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1697, Invalid=4623, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:31:23,970 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 80 states. [2018-09-23 19:31:24,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:24,271 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2018-09-23 19:31:24,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:31:24,272 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 98 [2018-09-23 19:31:24,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:24,273 INFO L225 Difference]: With dead ends: 110 [2018-09-23 19:31:24,273 INFO L226 Difference]: Without dead ends: 108 [2018-09-23 19:31:24,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3419 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1697, Invalid=4623, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:31:24,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-23 19:31:24,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2018-09-23 19:31:24,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 19:31:24,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2018-09-23 19:31:24,278 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 98 [2018-09-23 19:31:24,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:24,278 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2018-09-23 19:31:24,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 19:31:24,279 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2018-09-23 19:31:24,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-23 19:31:24,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:24,280 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1] [2018-09-23 19:31:24,280 INFO L423 AbstractCegarLoop]: === Iteration 22 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:24,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:24,280 INFO L82 PathProgramCache]: Analyzing trace with hash -2025971232, now seen corresponding path program 20 times [2018-09-23 19:31:24,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:24,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:24,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:24,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:24,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:25,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:25,618 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 [2018-09-23 19:31:25,627 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:31:25,650 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:31:25,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:25,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:29,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:29,042 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 83 [2018-09-23 19:31:29,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 19:31:29,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 19:31:29,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1866, Invalid=5106, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:31:29,044 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand 84 states. [2018-09-23 19:31:29,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:29,355 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2018-09-23 19:31:29,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:31:29,357 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 103 [2018-09-23 19:31:29,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:29,358 INFO L225 Difference]: With dead ends: 115 [2018-09-23 19:31:29,358 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 19:31:29,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3789 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1866, Invalid=5106, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:31:29,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 19:31:29,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2018-09-23 19:31:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 19:31:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2018-09-23 19:31:29,365 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 103 [2018-09-23 19:31:29,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:29,365 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2018-09-23 19:31:29,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 19:31:29,365 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2018-09-23 19:31:29,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 19:31:29,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:29,366 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1] [2018-09-23 19:31:29,366 INFO L423 AbstractCegarLoop]: === Iteration 23 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:29,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:29,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1207497748, now seen corresponding path program 21 times [2018-09-23 19:31:29,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:29,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:29,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:29,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:29,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:30,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:30,543 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 [2018-09-23 19:31:30,551 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:31:30,584 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-23 19:31:30,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:30,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:31,944 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:31,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 87 [2018-09-23 19:31:31,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 19:31:31,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 19:31:31,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2043, Invalid=5613, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:31:31,946 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand 88 states. [2018-09-23 19:31:32,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:32,348 INFO L93 Difference]: Finished difference Result 120 states and 143 transitions. [2018-09-23 19:31:32,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:31:32,348 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 108 [2018-09-23 19:31:32,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:32,350 INFO L225 Difference]: With dead ends: 120 [2018-09-23 19:31:32,350 INFO L226 Difference]: Without dead ends: 118 [2018-09-23 19:31:32,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4178 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2043, Invalid=5613, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:31:32,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-23 19:31:32,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2018-09-23 19:31:32,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-23 19:31:32,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2018-09-23 19:31:32,356 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 108 [2018-09-23 19:31:32,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:32,357 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2018-09-23 19:31:32,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 19:31:32,357 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2018-09-23 19:31:32,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-23 19:31:32,357 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:32,358 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1] [2018-09-23 19:31:32,358 INFO L423 AbstractCegarLoop]: === Iteration 24 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:32,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:32,358 INFO L82 PathProgramCache]: Analyzing trace with hash 649759072, now seen corresponding path program 22 times [2018-09-23 19:31:32,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:32,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:32,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:32,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:32,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:33,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:33,294 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 [2018-09-23 19:31:33,302 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:31:33,330 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:31:33,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:33,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:34,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:34,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 91 [2018-09-23 19:31:34,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 19:31:34,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 19:31:34,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2228, Invalid=6144, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:31:34,791 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand 92 states. [2018-09-23 19:31:35,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:35,118 INFO L93 Difference]: Finished difference Result 125 states and 149 transitions. [2018-09-23 19:31:35,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:31:35,118 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 113 [2018-09-23 19:31:35,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:35,119 INFO L225 Difference]: With dead ends: 125 [2018-09-23 19:31:35,119 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 19:31:35,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4586 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2228, Invalid=6144, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:31:35,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 19:31:35,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-09-23 19:31:35,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 19:31:35,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2018-09-23 19:31:35,127 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 113 [2018-09-23 19:31:35,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:35,128 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2018-09-23 19:31:35,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 19:31:35,128 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2018-09-23 19:31:35,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-23 19:31:35,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:35,129 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1] [2018-09-23 19:31:35,129 INFO L423 AbstractCegarLoop]: === Iteration 25 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:35,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:35,130 INFO L82 PathProgramCache]: Analyzing trace with hash 60773484, now seen corresponding path program 23 times [2018-09-23 19:31:35,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:35,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:35,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:35,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:35,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:36,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:36,382 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 [2018-09-23 19:31:36,391 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:31:36,427 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-23 19:31:36,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:36,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:38,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:38,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2018-09-23 19:31:38,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 19:31:38,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 19:31:38,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2421, Invalid=6699, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:31:38,155 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand 96 states. [2018-09-23 19:31:38,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:38,609 INFO L93 Difference]: Finished difference Result 130 states and 155 transitions. [2018-09-23 19:31:38,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:31:38,609 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 118 [2018-09-23 19:31:38,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:38,610 INFO L225 Difference]: With dead ends: 130 [2018-09-23 19:31:38,611 INFO L226 Difference]: Without dead ends: 128 [2018-09-23 19:31:38,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5013 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2421, Invalid=6699, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:31:38,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-23 19:31:38,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2018-09-23 19:31:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-23 19:31:38,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2018-09-23 19:31:38,617 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 118 [2018-09-23 19:31:38,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:38,617 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2018-09-23 19:31:38,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 19:31:38,618 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2018-09-23 19:31:38,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-23 19:31:38,618 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:38,618 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1] [2018-09-23 19:31:38,619 INFO L423 AbstractCegarLoop]: === Iteration 26 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:38,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:38,619 INFO L82 PathProgramCache]: Analyzing trace with hash 293310688, now seen corresponding path program 24 times [2018-09-23 19:31:38,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:38,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:38,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:38,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:38,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:39,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:39,645 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 [2018-09-23 19:31:39,653 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:31:39,691 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 19:31:39,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:39,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:41,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:41,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 99 [2018-09-23 19:31:41,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 19:31:41,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 19:31:41,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2622, Invalid=7278, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:31:41,723 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand 100 states. [2018-09-23 19:31:42,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:42,216 INFO L93 Difference]: Finished difference Result 135 states and 161 transitions. [2018-09-23 19:31:42,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:31:42,216 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 123 [2018-09-23 19:31:42,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:42,217 INFO L225 Difference]: With dead ends: 135 [2018-09-23 19:31:42,217 INFO L226 Difference]: Without dead ends: 133 [2018-09-23 19:31:42,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2622, Invalid=7278, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:31:42,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-23 19:31:42,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2018-09-23 19:31:42,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-23 19:31:42,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2018-09-23 19:31:42,224 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 123 [2018-09-23 19:31:42,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:42,224 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2018-09-23 19:31:42,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 19:31:42,225 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2018-09-23 19:31:42,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-23 19:31:42,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:42,225 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1] [2018-09-23 19:31:42,226 INFO L423 AbstractCegarLoop]: === Iteration 27 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:42,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:42,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1977023724, now seen corresponding path program 25 times [2018-09-23 19:31:42,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:42,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:42,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:42,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:42,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:43,511 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:43,511 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 [2018-09-23 19:31:43,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:43,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:45,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:45,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 103 [2018-09-23 19:31:45,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 19:31:45,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 19:31:45,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2831, Invalid=7881, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:31:45,330 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand 104 states. [2018-09-23 19:31:45,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:45,828 INFO L93 Difference]: Finished difference Result 140 states and 167 transitions. [2018-09-23 19:31:45,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:31:45,829 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 128 [2018-09-23 19:31:45,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:45,829 INFO L225 Difference]: With dead ends: 140 [2018-09-23 19:31:45,829 INFO L226 Difference]: Without dead ends: 138 [2018-09-23 19:31:45,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5924 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2831, Invalid=7881, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:31:45,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-23 19:31:45,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2018-09-23 19:31:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-23 19:31:45,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2018-09-23 19:31:45,835 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 128 [2018-09-23 19:31:45,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:45,836 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2018-09-23 19:31:45,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 19:31:45,836 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2018-09-23 19:31:45,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-23 19:31:45,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:45,837 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1] [2018-09-23 19:31:45,837 INFO L423 AbstractCegarLoop]: === Iteration 28 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:45,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:45,837 INFO L82 PathProgramCache]: Analyzing trace with hash -231131040, now seen corresponding path program 26 times [2018-09-23 19:31:45,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:45,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:45,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:45,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:45,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:47,379 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:47,379 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 [2018-09-23 19:31:47,386 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:31:47,421 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:31:47,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:47,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:49,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:49,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 107 [2018-09-23 19:31:49,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-23 19:31:49,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-23 19:31:49,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3048, Invalid=8508, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:31:49,390 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand 108 states. [2018-09-23 19:31:50,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:50,167 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2018-09-23 19:31:50,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:31:50,167 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 133 [2018-09-23 19:31:50,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:50,168 INFO L225 Difference]: With dead ends: 145 [2018-09-23 19:31:50,168 INFO L226 Difference]: Without dead ends: 143 [2018-09-23 19:31:50,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6408 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3048, Invalid=8508, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:31:50,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-23 19:31:50,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-09-23 19:31:50,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-23 19:31:50,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2018-09-23 19:31:50,174 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 133 [2018-09-23 19:31:50,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:50,175 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2018-09-23 19:31:50,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-23 19:31:50,175 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2018-09-23 19:31:50,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-23 19:31:50,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:50,176 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1] [2018-09-23 19:31:50,176 INFO L423 AbstractCegarLoop]: === Iteration 29 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:50,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:50,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1458963820, now seen corresponding path program 27 times [2018-09-23 19:31:50,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:50,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:50,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:50,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:50,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:51,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:51,661 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 [2018-09-23 19:31:51,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:31:51,712 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-23 19:31:51,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:51,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:54,491 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:54,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 111 [2018-09-23 19:31:54,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-23 19:31:54,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-23 19:31:54,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3273, Invalid=9159, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 19:31:54,493 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand 112 states. [2018-09-23 19:31:54,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:54,943 INFO L93 Difference]: Finished difference Result 150 states and 179 transitions. [2018-09-23 19:31:54,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:31:54,944 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 138 [2018-09-23 19:31:54,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:54,945 INFO L225 Difference]: With dead ends: 150 [2018-09-23 19:31:54,945 INFO L226 Difference]: Without dead ends: 148 [2018-09-23 19:31:54,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3273, Invalid=9159, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 19:31:54,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-23 19:31:54,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2018-09-23 19:31:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-23 19:31:54,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 172 transitions. [2018-09-23 19:31:54,952 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 172 transitions. Word has length 138 [2018-09-23 19:31:54,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:54,953 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 172 transitions. [2018-09-23 19:31:54,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-23 19:31:54,953 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 172 transitions. [2018-09-23 19:31:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-23 19:31:54,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:54,954 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1] [2018-09-23 19:31:54,954 INFO L423 AbstractCegarLoop]: === Iteration 30 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:54,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:54,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1839955936, now seen corresponding path program 28 times [2018-09-23 19:31:54,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:54,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:54,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:54,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:54,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:56,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:56,543 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 [2018-09-23 19:31:56,551 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:31:56,587 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:31:56,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:56,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:59,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:59,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 115 [2018-09-23 19:31:59,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-23 19:31:59,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-23 19:31:59,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3506, Invalid=9834, Unknown=0, NotChecked=0, Total=13340 [2018-09-23 19:31:59,218 INFO L87 Difference]: Start difference. First operand 144 states and 172 transitions. Second operand 116 states. [2018-09-23 19:31:59,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:59,828 INFO L93 Difference]: Finished difference Result 155 states and 185 transitions. [2018-09-23 19:31:59,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:31:59,829 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 143 [2018-09-23 19:31:59,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:59,830 INFO L225 Difference]: With dead ends: 155 [2018-09-23 19:31:59,830 INFO L226 Difference]: Without dead ends: 153 [2018-09-23 19:31:59,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7433 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3506, Invalid=9834, Unknown=0, NotChecked=0, Total=13340 [2018-09-23 19:31:59,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-23 19:31:59,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2018-09-23 19:31:59,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-23 19:31:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2018-09-23 19:31:59,837 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 143 [2018-09-23 19:31:59,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:59,838 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2018-09-23 19:31:59,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-23 19:31:59,838 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2018-09-23 19:31:59,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-23 19:31:59,839 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:59,839 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1] [2018-09-23 19:31:59,839 INFO L423 AbstractCegarLoop]: === Iteration 31 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:59,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:59,839 INFO L82 PathProgramCache]: Analyzing trace with hash 893677036, now seen corresponding path program 29 times [2018-09-23 19:31:59,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:59,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:59,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:59,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:59,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:01,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:01,761 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 [2018-09-23 19:32:01,768 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:32:01,816 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-23 19:32:01,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:01,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:04,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:04,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 119 [2018-09-23 19:32:04,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-23 19:32:04,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-23 19:32:04,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3747, Invalid=10533, Unknown=0, NotChecked=0, Total=14280 [2018-09-23 19:32:04,203 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand 120 states. [2018-09-23 19:32:04,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:04,741 INFO L93 Difference]: Finished difference Result 160 states and 191 transitions. [2018-09-23 19:32:04,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:32:04,742 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 148 [2018-09-23 19:32:04,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:04,743 INFO L225 Difference]: With dead ends: 160 [2018-09-23 19:32:04,743 INFO L226 Difference]: Without dead ends: 158 [2018-09-23 19:32:04,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7974 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3747, Invalid=10533, Unknown=0, NotChecked=0, Total=14280 [2018-09-23 19:32:04,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-23 19:32:04,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2018-09-23 19:32:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-23 19:32:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 184 transitions. [2018-09-23 19:32:04,750 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 184 transitions. Word has length 148 [2018-09-23 19:32:04,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:04,751 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 184 transitions. [2018-09-23 19:32:04,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-23 19:32:04,751 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 184 transitions. [2018-09-23 19:32:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-23 19:32:04,752 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:04,752 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1] [2018-09-23 19:32:04,752 INFO L423 AbstractCegarLoop]: === Iteration 32 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:04,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:04,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1567987872, now seen corresponding path program 30 times [2018-09-23 19:32:04,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:04,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:04,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:04,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:04,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:06,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:06,607 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 [2018-09-23 19:32:06,616 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:32:06,675 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 19:32:06,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:06,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:09,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:09,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:09,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 123 [2018-09-23 19:32:09,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-23 19:32:09,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-23 19:32:09,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3996, Invalid=11256, Unknown=0, NotChecked=0, Total=15252 [2018-09-23 19:32:09,121 INFO L87 Difference]: Start difference. First operand 154 states and 184 transitions. Second operand 124 states. [2018-09-23 19:32:09,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:09,665 INFO L93 Difference]: Finished difference Result 165 states and 197 transitions. [2018-09-23 19:32:09,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:32:09,665 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 153 [2018-09-23 19:32:09,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:09,666 INFO L225 Difference]: With dead ends: 165 [2018-09-23 19:32:09,666 INFO L226 Difference]: Without dead ends: 163 [2018-09-23 19:32:09,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8534 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3996, Invalid=11256, Unknown=0, NotChecked=0, Total=15252 [2018-09-23 19:32:09,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-23 19:32:09,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-09-23 19:32:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-23 19:32:09,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 190 transitions. [2018-09-23 19:32:09,674 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 190 transitions. Word has length 153 [2018-09-23 19:32:09,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:09,674 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 190 transitions. [2018-09-23 19:32:09,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-23 19:32:09,674 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 190 transitions. [2018-09-23 19:32:09,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-23 19:32:09,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:09,675 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1] [2018-09-23 19:32:09,675 INFO L423 AbstractCegarLoop]: === Iteration 33 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:09,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:09,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1695168108, now seen corresponding path program 31 times [2018-09-23 19:32:09,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:09,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:09,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:09,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:09,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:11,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:11,482 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 [2018-09-23 19:32:11,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:11,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:14,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:14,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 127 [2018-09-23 19:32:14,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-23 19:32:14,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-23 19:32:14,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4253, Invalid=12003, Unknown=0, NotChecked=0, Total=16256 [2018-09-23 19:32:14,157 INFO L87 Difference]: Start difference. First operand 159 states and 190 transitions. Second operand 128 states. [2018-09-23 19:32:15,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:15,363 INFO L93 Difference]: Finished difference Result 170 states and 203 transitions. [2018-09-23 19:32:15,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:32:15,364 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 158 [2018-09-23 19:32:15,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:15,365 INFO L225 Difference]: With dead ends: 170 [2018-09-23 19:32:15,365 INFO L226 Difference]: Without dead ends: 168 [2018-09-23 19:32:15,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9113 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4253, Invalid=12003, Unknown=0, NotChecked=0, Total=16256 [2018-09-23 19:32:15,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-09-23 19:32:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2018-09-23 19:32:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-23 19:32:15,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 196 transitions. [2018-09-23 19:32:15,371 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 196 transitions. Word has length 158 [2018-09-23 19:32:15,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:15,372 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 196 transitions. [2018-09-23 19:32:15,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-23 19:32:15,372 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 196 transitions. [2018-09-23 19:32:15,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-23 19:32:15,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:15,373 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1] [2018-09-23 19:32:15,373 INFO L423 AbstractCegarLoop]: === Iteration 34 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:15,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:15,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1450316064, now seen corresponding path program 32 times [2018-09-23 19:32:15,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:15,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:15,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:15,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:15,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:18,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:18,687 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 [2018-09-23 19:32:18,694 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:18,753 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:18,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:18,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:22,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:22,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:22,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 131 [2018-09-23 19:32:22,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-23 19:32:22,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-23 19:32:22,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4518, Invalid=12774, Unknown=0, NotChecked=0, Total=17292 [2018-09-23 19:32:22,320 INFO L87 Difference]: Start difference. First operand 164 states and 196 transitions. Second operand 132 states. [2018-09-23 19:32:22,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:22,867 INFO L93 Difference]: Finished difference Result 175 states and 209 transitions. [2018-09-23 19:32:22,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:32:22,867 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 163 [2018-09-23 19:32:22,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:22,868 INFO L225 Difference]: With dead ends: 175 [2018-09-23 19:32:22,868 INFO L226 Difference]: Without dead ends: 173 [2018-09-23 19:32:22,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9711 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4518, Invalid=12774, Unknown=0, NotChecked=0, Total=17292 [2018-09-23 19:32:22,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-23 19:32:22,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2018-09-23 19:32:22,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-23 19:32:22,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2018-09-23 19:32:22,876 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 163 [2018-09-23 19:32:22,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:22,877 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2018-09-23 19:32:22,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-23 19:32:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2018-09-23 19:32:22,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-23 19:32:22,878 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:22,878 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1] [2018-09-23 19:32:22,878 INFO L423 AbstractCegarLoop]: === Iteration 35 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:22,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:22,879 INFO L82 PathProgramCache]: Analyzing trace with hash -2138087700, now seen corresponding path program 33 times [2018-09-23 19:32:22,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:22,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:22,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:22,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:22,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:25,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:25,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:25,044 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:32:25,100 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-23 19:32:25,100 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:25,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:28,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:28,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 135 [2018-09-23 19:32:28,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-23 19:32:28,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-23 19:32:28,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4791, Invalid=13569, Unknown=0, NotChecked=0, Total=18360 [2018-09-23 19:32:28,236 INFO L87 Difference]: Start difference. First operand 169 states and 202 transitions. Second operand 136 states. [2018-09-23 19:32:28,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:28,842 INFO L93 Difference]: Finished difference Result 180 states and 215 transitions. [2018-09-23 19:32:28,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:32:28,843 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 168 [2018-09-23 19:32:28,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:28,844 INFO L225 Difference]: With dead ends: 180 [2018-09-23 19:32:28,844 INFO L226 Difference]: Without dead ends: 178 [2018-09-23 19:32:28,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10328 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4791, Invalid=13569, Unknown=0, NotChecked=0, Total=18360 [2018-09-23 19:32:28,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-23 19:32:28,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2018-09-23 19:32:28,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-09-23 19:32:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 208 transitions. [2018-09-23 19:32:28,852 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 208 transitions. Word has length 168 [2018-09-23 19:32:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:28,853 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 208 transitions. [2018-09-23 19:32:28,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-23 19:32:28,853 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 208 transitions. [2018-09-23 19:32:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-23 19:32:28,854 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:28,854 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1] [2018-09-23 19:32:28,854 INFO L423 AbstractCegarLoop]: === Iteration 36 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:28,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:28,854 INFO L82 PathProgramCache]: Analyzing trace with hash 359536224, now seen corresponding path program 34 times [2018-09-23 19:32:28,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:28,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:28,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:28,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:28,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:30,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:30,744 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 [2018-09-23 19:32:30,752 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:32:30,792 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:32:30,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:30,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:35,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:35,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 139 [2018-09-23 19:32:35,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-23 19:32:35,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-23 19:32:35,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5072, Invalid=14388, Unknown=0, NotChecked=0, Total=19460 [2018-09-23 19:32:35,033 INFO L87 Difference]: Start difference. First operand 174 states and 208 transitions. Second operand 140 states. [2018-09-23 19:32:35,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:35,644 INFO L93 Difference]: Finished difference Result 185 states and 221 transitions. [2018-09-23 19:32:35,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:32:35,644 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 173 [2018-09-23 19:32:35,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:35,645 INFO L225 Difference]: With dead ends: 185 [2018-09-23 19:32:35,645 INFO L226 Difference]: Without dead ends: 183 [2018-09-23 19:32:35,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10964 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5072, Invalid=14388, Unknown=0, NotChecked=0, Total=19460 [2018-09-23 19:32:35,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-23 19:32:35,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-09-23 19:32:35,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-23 19:32:35,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 214 transitions. [2018-09-23 19:32:35,651 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 214 transitions. Word has length 173 [2018-09-23 19:32:35,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:35,651 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 214 transitions. [2018-09-23 19:32:35,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-23 19:32:35,651 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 214 transitions. [2018-09-23 19:32:35,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-23 19:32:35,652 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:35,652 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1] [2018-09-23 19:32:35,652 INFO L423 AbstractCegarLoop]: === Iteration 37 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:35,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:35,652 INFO L82 PathProgramCache]: Analyzing trace with hash -400824468, now seen corresponding path program 35 times [2018-09-23 19:32:35,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:35,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:35,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:35,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:35,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:38,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:38,673 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 [2018-09-23 19:32:38,680 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:32:38,750 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-23 19:32:38,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:38,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:42,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:42,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 143 [2018-09-23 19:32:42,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-23 19:32:42,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-23 19:32:42,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5361, Invalid=15231, Unknown=0, NotChecked=0, Total=20592 [2018-09-23 19:32:42,092 INFO L87 Difference]: Start difference. First operand 179 states and 214 transitions. Second operand 144 states. [2018-09-23 19:32:42,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:42,815 INFO L93 Difference]: Finished difference Result 190 states and 227 transitions. [2018-09-23 19:32:42,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 19:32:42,816 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 178 [2018-09-23 19:32:42,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:42,817 INFO L225 Difference]: With dead ends: 190 [2018-09-23 19:32:42,817 INFO L226 Difference]: Without dead ends: 188 [2018-09-23 19:32:42,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11619 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5361, Invalid=15231, Unknown=0, NotChecked=0, Total=20592 [2018-09-23 19:32:42,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-09-23 19:32:42,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2018-09-23 19:32:42,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-23 19:32:42,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2018-09-23 19:32:42,825 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 178 [2018-09-23 19:32:42,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:42,825 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2018-09-23 19:32:42,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-23 19:32:42,825 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2018-09-23 19:32:42,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-23 19:32:42,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:42,826 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1] [2018-09-23 19:32:42,827 INFO L423 AbstractCegarLoop]: === Iteration 38 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:42,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:42,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1927470560, now seen corresponding path program 36 times [2018-09-23 19:32:42,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:42,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:42,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:42,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:42,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:45,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:45,381 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 [2018-09-23 19:32:45,389 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:32:45,451 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 19:32:45,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:45,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:49,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:49,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 147 [2018-09-23 19:32:49,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-23 19:32:49,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-23 19:32:49,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5658, Invalid=16098, Unknown=0, NotChecked=0, Total=21756 [2018-09-23 19:32:49,701 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand 148 states. [2018-09-23 19:32:50,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:50,277 INFO L93 Difference]: Finished difference Result 195 states and 233 transitions. [2018-09-23 19:32:50,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 19:32:50,277 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 183 [2018-09-23 19:32:50,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:50,278 INFO L225 Difference]: With dead ends: 195 [2018-09-23 19:32:50,279 INFO L226 Difference]: Without dead ends: 193 [2018-09-23 19:32:50,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12293 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=5658, Invalid=16098, Unknown=0, NotChecked=0, Total=21756 [2018-09-23 19:32:50,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-23 19:32:50,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2018-09-23 19:32:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-23 19:32:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 226 transitions. [2018-09-23 19:32:50,286 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 226 transitions. Word has length 183 [2018-09-23 19:32:50,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:50,286 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 226 transitions. [2018-09-23 19:32:50,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-23 19:32:50,286 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 226 transitions. [2018-09-23 19:32:50,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-23 19:32:50,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:50,287 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1] [2018-09-23 19:32:50,288 INFO L423 AbstractCegarLoop]: === Iteration 39 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:50,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:50,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1106759660, now seen corresponding path program 37 times [2018-09-23 19:32:50,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:50,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:50,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:50,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:50,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:52,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:52,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:52,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:52,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:56,494 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:56,494 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 151 [2018-09-23 19:32:56,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-23 19:32:56,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-23 19:32:56,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5963, Invalid=16989, Unknown=0, NotChecked=0, Total=22952 [2018-09-23 19:32:56,496 INFO L87 Difference]: Start difference. First operand 189 states and 226 transitions. Second operand 152 states. [2018-09-23 19:32:57,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:57,190 INFO L93 Difference]: Finished difference Result 200 states and 239 transitions. [2018-09-23 19:32:57,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:32:57,191 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 188 [2018-09-23 19:32:57,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:57,192 INFO L225 Difference]: With dead ends: 200 [2018-09-23 19:32:57,192 INFO L226 Difference]: Without dead ends: 198 [2018-09-23 19:32:57,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12986 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5963, Invalid=16989, Unknown=0, NotChecked=0, Total=22952 [2018-09-23 19:32:57,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-09-23 19:32:57,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2018-09-23 19:32:57,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-09-23 19:32:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 232 transitions. [2018-09-23 19:32:57,199 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 232 transitions. Word has length 188 [2018-09-23 19:32:57,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:57,200 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 232 transitions. [2018-09-23 19:32:57,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-23 19:32:57,200 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 232 transitions. [2018-09-23 19:32:57,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-09-23 19:32:57,201 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:57,201 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1] [2018-09-23 19:32:57,201 INFO L423 AbstractCegarLoop]: === Iteration 40 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:57,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:57,202 INFO L82 PathProgramCache]: Analyzing trace with hash -928758432, now seen corresponding path program 38 times [2018-09-23 19:32:57,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:57,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:57,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:57,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:57,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:59,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:59,594 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 [2018-09-23 19:32:59,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:59,656 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:59,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:59,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:03,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:03,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 155 [2018-09-23 19:33:03,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-23 19:33:03,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-23 19:33:03,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6276, Invalid=17904, Unknown=0, NotChecked=0, Total=24180 [2018-09-23 19:33:03,655 INFO L87 Difference]: Start difference. First operand 194 states and 232 transitions. Second operand 156 states. [2018-09-23 19:33:04,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:04,443 INFO L93 Difference]: Finished difference Result 205 states and 245 transitions. [2018-09-23 19:33:04,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 19:33:04,444 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 193 [2018-09-23 19:33:04,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:04,445 INFO L225 Difference]: With dead ends: 205 [2018-09-23 19:33:04,445 INFO L226 Difference]: Without dead ends: 203 [2018-09-23 19:33:04,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13698 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=6276, Invalid=17904, Unknown=0, NotChecked=0, Total=24180 [2018-09-23 19:33:04,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-23 19:33:04,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-09-23 19:33:04,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-23 19:33:04,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 238 transitions. [2018-09-23 19:33:04,453 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 238 transitions. Word has length 193 [2018-09-23 19:33:04,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:04,453 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 238 transitions. [2018-09-23 19:33:04,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-23 19:33:04,453 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 238 transitions. [2018-09-23 19:33:04,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-23 19:33:04,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:04,454 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1] [2018-09-23 19:33:04,454 INFO L423 AbstractCegarLoop]: === Iteration 41 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:04,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:04,455 INFO L82 PathProgramCache]: Analyzing trace with hash -93644692, now seen corresponding path program 39 times [2018-09-23 19:33:04,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:04,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:04,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:04,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:04,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:06,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:06,836 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 [2018-09-23 19:33:06,845 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:33:06,910 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-23 19:33:06,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:06,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:11,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:11,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 159 [2018-09-23 19:33:11,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-23 19:33:11,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-23 19:33:11,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6597, Invalid=18843, Unknown=0, NotChecked=0, Total=25440 [2018-09-23 19:33:11,134 INFO L87 Difference]: Start difference. First operand 199 states and 238 transitions. Second operand 160 states. [2018-09-23 19:33:11,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:11,888 INFO L93 Difference]: Finished difference Result 210 states and 251 transitions. [2018-09-23 19:33:11,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 19:33:11,888 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 198 [2018-09-23 19:33:11,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:11,889 INFO L225 Difference]: With dead ends: 210 [2018-09-23 19:33:11,889 INFO L226 Difference]: Without dead ends: 208 [2018-09-23 19:33:11,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14429 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=6597, Invalid=18843, Unknown=0, NotChecked=0, Total=25440 [2018-09-23 19:33:11,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-09-23 19:33:11,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2018-09-23 19:33:11,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-09-23 19:33:11,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 244 transitions. [2018-09-23 19:33:11,895 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 244 transitions. Word has length 198 [2018-09-23 19:33:11,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:11,895 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 244 transitions. [2018-09-23 19:33:11,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-23 19:33:11,895 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 244 transitions. [2018-09-23 19:33:11,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-23 19:33:11,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:11,896 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1] [2018-09-23 19:33:11,896 INFO L423 AbstractCegarLoop]: === Iteration 42 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:11,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:11,896 INFO L82 PathProgramCache]: Analyzing trace with hash 392842464, now seen corresponding path program 40 times [2018-09-23 19:33:11,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:11,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:11,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:11,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:11,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:14,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:14,849 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 [2018-09-23 19:33:14,856 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:33:14,906 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:33:14,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:14,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:19,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:19,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 163 [2018-09-23 19:33:19,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-09-23 19:33:19,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-09-23 19:33:19,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6926, Invalid=19806, Unknown=0, NotChecked=0, Total=26732 [2018-09-23 19:33:19,182 INFO L87 Difference]: Start difference. First operand 204 states and 244 transitions. Second operand 164 states. [2018-09-23 19:33:19,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:19,978 INFO L93 Difference]: Finished difference Result 215 states and 257 transitions. [2018-09-23 19:33:19,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 19:33:19,979 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 203 [2018-09-23 19:33:19,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:19,980 INFO L225 Difference]: With dead ends: 215 [2018-09-23 19:33:19,980 INFO L226 Difference]: Without dead ends: 213 [2018-09-23 19:33:19,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15179 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=6926, Invalid=19806, Unknown=0, NotChecked=0, Total=26732 [2018-09-23 19:33:19,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-23 19:33:19,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2018-09-23 19:33:19,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-23 19:33:19,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 250 transitions. [2018-09-23 19:33:19,986 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 250 transitions. Word has length 203 [2018-09-23 19:33:19,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:19,986 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 250 transitions. [2018-09-23 19:33:19,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-09-23 19:33:19,987 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 250 transitions. [2018-09-23 19:33:19,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-23 19:33:19,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:19,988 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1] [2018-09-23 19:33:19,988 INFO L423 AbstractCegarLoop]: === Iteration 43 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:19,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:19,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1010974484, now seen corresponding path program 41 times [2018-09-23 19:33:19,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:19,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:19,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:19,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:19,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:23,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:23,067 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 [2018-09-23 19:33:23,088 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:33:23,163 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-23 19:33:23,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:23,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:29,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:29,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 167 [2018-09-23 19:33:29,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-09-23 19:33:29,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-09-23 19:33:29,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7263, Invalid=20793, Unknown=0, NotChecked=0, Total=28056 [2018-09-23 19:33:29,483 INFO L87 Difference]: Start difference. First operand 209 states and 250 transitions. Second operand 168 states. [2018-09-23 19:33:30,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:30,344 INFO L93 Difference]: Finished difference Result 220 states and 263 transitions. [2018-09-23 19:33:30,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 19:33:30,345 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 208 [2018-09-23 19:33:30,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:30,346 INFO L225 Difference]: With dead ends: 220 [2018-09-23 19:33:30,346 INFO L226 Difference]: Without dead ends: 218 [2018-09-23 19:33:30,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15948 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=7263, Invalid=20793, Unknown=0, NotChecked=0, Total=28056 [2018-09-23 19:33:30,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-09-23 19:33:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2018-09-23 19:33:30,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-09-23 19:33:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 256 transitions. [2018-09-23 19:33:30,354 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 256 transitions. Word has length 208 [2018-09-23 19:33:30,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:30,354 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 256 transitions. [2018-09-23 19:33:30,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-09-23 19:33:30,355 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 256 transitions. [2018-09-23 19:33:30,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-09-23 19:33:30,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:30,356 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1] [2018-09-23 19:33:30,356 INFO L423 AbstractCegarLoop]: === Iteration 44 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:30,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:30,356 INFO L82 PathProgramCache]: Analyzing trace with hash -638782368, now seen corresponding path program 42 times [2018-09-23 19:33:30,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:30,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:30,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:30,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:30,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:33,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:33,056 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 [2018-09-23 19:33:33,064 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:33:33,152 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 19:33:33,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:33,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:37,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:37,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 171 [2018-09-23 19:33:37,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-09-23 19:33:37,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-09-23 19:33:37,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7608, Invalid=21804, Unknown=0, NotChecked=0, Total=29412 [2018-09-23 19:33:37,857 INFO L87 Difference]: Start difference. First operand 214 states and 256 transitions. Second operand 172 states. [2018-09-23 19:33:38,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:38,702 INFO L93 Difference]: Finished difference Result 225 states and 269 transitions. [2018-09-23 19:33:38,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-23 19:33:38,703 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 213 [2018-09-23 19:33:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:38,704 INFO L225 Difference]: With dead ends: 225 [2018-09-23 19:33:38,704 INFO L226 Difference]: Without dead ends: 223 [2018-09-23 19:33:38,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16736 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=7608, Invalid=21804, Unknown=0, NotChecked=0, Total=29412 [2018-09-23 19:33:38,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-23 19:33:38,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2018-09-23 19:33:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-23 19:33:38,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 262 transitions. [2018-09-23 19:33:38,710 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 262 transitions. Word has length 213 [2018-09-23 19:33:38,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:38,711 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 262 transitions. [2018-09-23 19:33:38,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-09-23 19:33:38,711 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 262 transitions. [2018-09-23 19:33:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-23 19:33:38,712 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:38,712 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1] [2018-09-23 19:33:38,712 INFO L423 AbstractCegarLoop]: === Iteration 45 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:38,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:38,712 INFO L82 PathProgramCache]: Analyzing trace with hash 372754796, now seen corresponding path program 43 times [2018-09-23 19:33:38,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:38,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:38,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:38,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:38,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:41,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:41,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:41,765 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 [2018-09-23 19:33:41,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:41,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:46,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:46,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 175 [2018-09-23 19:33:46,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-09-23 19:33:46,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-09-23 19:33:46,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7961, Invalid=22839, Unknown=0, NotChecked=0, Total=30800 [2018-09-23 19:33:46,704 INFO L87 Difference]: Start difference. First operand 219 states and 262 transitions. Second operand 176 states. [2018-09-23 19:33:47,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:47,617 INFO L93 Difference]: Finished difference Result 230 states and 275 transitions. [2018-09-23 19:33:47,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 19:33:47,617 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 218 [2018-09-23 19:33:47,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:47,618 INFO L225 Difference]: With dead ends: 230 [2018-09-23 19:33:47,618 INFO L226 Difference]: Without dead ends: 228 [2018-09-23 19:33:47,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17543 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=7961, Invalid=22839, Unknown=0, NotChecked=0, Total=30800 [2018-09-23 19:33:47,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-09-23 19:33:47,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2018-09-23 19:33:47,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-09-23 19:33:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 268 transitions. [2018-09-23 19:33:47,624 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 268 transitions. Word has length 218 [2018-09-23 19:33:47,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:47,624 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 268 transitions. [2018-09-23 19:33:47,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-09-23 19:33:47,625 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 268 transitions. [2018-09-23 19:33:47,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-09-23 19:33:47,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:47,626 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1] [2018-09-23 19:33:47,626 INFO L423 AbstractCegarLoop]: === Iteration 46 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:47,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:47,626 INFO L82 PathProgramCache]: Analyzing trace with hash -2065417248, now seen corresponding path program 44 times [2018-09-23 19:33:47,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:47,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:47,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:47,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:47,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:50,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:50,819 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 [2018-09-23 19:33:50,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:33:50,880 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:33:50,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:50,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:55,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:55,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 179 [2018-09-23 19:33:55,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-09-23 19:33:55,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-09-23 19:33:55,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8322, Invalid=23898, Unknown=0, NotChecked=0, Total=32220 [2018-09-23 19:33:55,956 INFO L87 Difference]: Start difference. First operand 224 states and 268 transitions. Second operand 180 states. [2018-09-23 19:33:56,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:56,973 INFO L93 Difference]: Finished difference Result 235 states and 281 transitions. [2018-09-23 19:33:56,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-23 19:33:56,973 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 223 [2018-09-23 19:33:56,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:56,974 INFO L225 Difference]: With dead ends: 235 [2018-09-23 19:33:56,974 INFO L226 Difference]: Without dead ends: 233 [2018-09-23 19:33:56,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18369 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=8322, Invalid=23898, Unknown=0, NotChecked=0, Total=32220 [2018-09-23 19:33:56,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-09-23 19:33:56,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2018-09-23 19:33:56,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-23 19:33:56,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 274 transitions. [2018-09-23 19:33:56,982 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 274 transitions. Word has length 223 [2018-09-23 19:33:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:56,983 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 274 transitions. [2018-09-23 19:33:56,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-09-23 19:33:56,983 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 274 transitions. [2018-09-23 19:33:56,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-23 19:33:56,984 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:56,984 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1] [2018-09-23 19:33:56,985 INFO L423 AbstractCegarLoop]: === Iteration 47 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:56,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:56,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1340001812, now seen corresponding path program 45 times [2018-09-23 19:33:56,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:56,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:56,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:56,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:56,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:00,282 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:00,283 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 [2018-09-23 19:34:00,290 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:34:00,371 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-23 19:34:00,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:00,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:05,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:05,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 183 [2018-09-23 19:34:05,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-09-23 19:34:05,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-09-23 19:34:05,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8691, Invalid=24981, Unknown=0, NotChecked=0, Total=33672 [2018-09-23 19:34:05,710 INFO L87 Difference]: Start difference. First operand 229 states and 274 transitions. Second operand 184 states. [2018-09-23 19:34:06,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:06,637 INFO L93 Difference]: Finished difference Result 240 states and 287 transitions. [2018-09-23 19:34:06,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-23 19:34:06,638 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 228 [2018-09-23 19:34:06,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:06,639 INFO L225 Difference]: With dead ends: 240 [2018-09-23 19:34:06,639 INFO L226 Difference]: Without dead ends: 238 [2018-09-23 19:34:06,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19214 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=8691, Invalid=24981, Unknown=0, NotChecked=0, Total=33672 [2018-09-23 19:34:06,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-09-23 19:34:06,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2018-09-23 19:34:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-09-23 19:34:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2018-09-23 19:34:06,648 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 228 [2018-09-23 19:34:06,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:06,648 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2018-09-23 19:34:06,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-09-23 19:34:06,648 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2018-09-23 19:34:06,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-09-23 19:34:06,650 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:06,650 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1] [2018-09-23 19:34:06,650 INFO L423 AbstractCegarLoop]: === Iteration 48 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:06,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:06,650 INFO L82 PathProgramCache]: Analyzing trace with hash 117973856, now seen corresponding path program 46 times [2018-09-23 19:34:06,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:06,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:06,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:06,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:06,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:09,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:09,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:34:09,999 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:34:10,072 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:34:10,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:10,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:15,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:15,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 187 [2018-09-23 19:34:15,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-09-23 19:34:15,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-09-23 19:34:15,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9068, Invalid=26088, Unknown=0, NotChecked=0, Total=35156 [2018-09-23 19:34:15,864 INFO L87 Difference]: Start difference. First operand 234 states and 280 transitions. Second operand 188 states. [2018-09-23 19:34:16,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:16,962 INFO L93 Difference]: Finished difference Result 245 states and 293 transitions. [2018-09-23 19:34:16,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-23 19:34:16,963 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 233 [2018-09-23 19:34:16,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:16,964 INFO L225 Difference]: With dead ends: 245 [2018-09-23 19:34:16,964 INFO L226 Difference]: Without dead ends: 243 [2018-09-23 19:34:16,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20078 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=9068, Invalid=26088, Unknown=0, NotChecked=0, Total=35156 [2018-09-23 19:34:16,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-23 19:34:16,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2018-09-23 19:34:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-23 19:34:16,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 286 transitions. [2018-09-23 19:34:16,973 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 286 transitions. Word has length 233 [2018-09-23 19:34:16,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:16,973 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 286 transitions. [2018-09-23 19:34:16,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-09-23 19:34:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 286 transitions. [2018-09-23 19:34:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-23 19:34:16,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:16,975 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1] [2018-09-23 19:34:16,975 INFO L423 AbstractCegarLoop]: === Iteration 49 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:16,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:16,975 INFO L82 PathProgramCache]: Analyzing trace with hash 365034092, now seen corresponding path program 47 times [2018-09-23 19:34:16,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:16,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:16,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:16,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:16,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:20,429 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:20,429 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 [2018-09-23 19:34:20,436 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:34:20,534 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-23 19:34:20,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:20,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:26,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:26,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 191 [2018-09-23 19:34:26,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-09-23 19:34:26,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-09-23 19:34:26,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9453, Invalid=27219, Unknown=0, NotChecked=0, Total=36672 [2018-09-23 19:34:26,359 INFO L87 Difference]: Start difference. First operand 239 states and 286 transitions. Second operand 192 states. [2018-09-23 19:34:27,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:27,444 INFO L93 Difference]: Finished difference Result 250 states and 299 transitions. [2018-09-23 19:34:27,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-23 19:34:27,444 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 238 [2018-09-23 19:34:27,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:27,446 INFO L225 Difference]: With dead ends: 250 [2018-09-23 19:34:27,446 INFO L226 Difference]: Without dead ends: 248 [2018-09-23 19:34:27,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20961 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=9453, Invalid=27219, Unknown=0, NotChecked=0, Total=36672 [2018-09-23 19:34:27,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-09-23 19:34:27,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2018-09-23 19:34:27,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-09-23 19:34:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 292 transitions. [2018-09-23 19:34:27,454 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 292 transitions. Word has length 238 [2018-09-23 19:34:27,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:27,455 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 292 transitions. [2018-09-23 19:34:27,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-09-23 19:34:27,455 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 292 transitions. [2018-09-23 19:34:27,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-23 19:34:27,456 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:27,456 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1] [2018-09-23 19:34:27,457 INFO L423 AbstractCegarLoop]: === Iteration 50 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:27,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:27,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1225829088, now seen corresponding path program 48 times [2018-09-23 19:34:27,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:27,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:27,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:27,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:27,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:31,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:31,026 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 [2018-09-23 19:34:31,034 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:34:31,118 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 19:34:31,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:31,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:37,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:37,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 195 [2018-09-23 19:34:37,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-09-23 19:34:37,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-09-23 19:34:37,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9846, Invalid=28374, Unknown=0, NotChecked=0, Total=38220 [2018-09-23 19:34:37,033 INFO L87 Difference]: Start difference. First operand 244 states and 292 transitions. Second operand 196 states. [2018-09-23 19:34:38,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:38,162 INFO L93 Difference]: Finished difference Result 255 states and 305 transitions. [2018-09-23 19:34:38,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-23 19:34:38,163 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 243 [2018-09-23 19:34:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:38,164 INFO L225 Difference]: With dead ends: 255 [2018-09-23 19:34:38,164 INFO L226 Difference]: Without dead ends: 253 [2018-09-23 19:34:38,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21863 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=9846, Invalid=28374, Unknown=0, NotChecked=0, Total=38220 [2018-09-23 19:34:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-09-23 19:34:38,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2018-09-23 19:34:38,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-09-23 19:34:38,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 298 transitions. [2018-09-23 19:34:38,170 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 298 transitions. Word has length 243 [2018-09-23 19:34:38,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:38,171 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 298 transitions. [2018-09-23 19:34:38,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-09-23 19:34:38,171 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 298 transitions. [2018-09-23 19:34:38,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-23 19:34:38,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:38,172 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1] [2018-09-23 19:34:38,173 INFO L423 AbstractCegarLoop]: === Iteration 51 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:38,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:38,173 INFO L82 PathProgramCache]: Analyzing trace with hash 291644140, now seen corresponding path program 49 times [2018-09-23 19:34:38,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:38,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:38,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:38,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:38,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:41,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:41,969 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 [2018-09-23 19:34:41,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:42,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:48,123 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:48,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 199 [2018-09-23 19:34:48,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 200 states [2018-09-23 19:34:48,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2018-09-23 19:34:48,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10247, Invalid=29553, Unknown=0, NotChecked=0, Total=39800 [2018-09-23 19:34:48,126 INFO L87 Difference]: Start difference. First operand 249 states and 298 transitions. Second operand 200 states. [2018-09-23 19:34:49,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:49,289 INFO L93 Difference]: Finished difference Result 260 states and 311 transitions. [2018-09-23 19:34:49,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-23 19:34:49,290 INFO L78 Accepts]: Start accepts. Automaton has 200 states. Word has length 248 [2018-09-23 19:34:49,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:49,291 INFO L225 Difference]: With dead ends: 260 [2018-09-23 19:34:49,291 INFO L226 Difference]: Without dead ends: 258 [2018-09-23 19:34:49,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22784 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=10247, Invalid=29553, Unknown=0, NotChecked=0, Total=39800 [2018-09-23 19:34:49,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-09-23 19:34:49,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 254. [2018-09-23 19:34:49,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-09-23 19:34:49,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 304 transitions. [2018-09-23 19:34:49,300 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 304 transitions. Word has length 248 [2018-09-23 19:34:49,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:49,301 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 304 transitions. [2018-09-23 19:34:49,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 200 states. [2018-09-23 19:34:49,301 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 304 transitions. [2018-09-23 19:34:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-09-23 19:34:49,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:49,302 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1] [2018-09-23 19:34:49,303 INFO L423 AbstractCegarLoop]: === Iteration 52 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:49,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:49,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1380593056, now seen corresponding path program 50 times [2018-09-23 19:34:49,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:49,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:49,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:49,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:49,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 19:34:50,666 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:34:50,671 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:34:50,671 INFO L202 PluginConnector]: Adding new model GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:34:50 BoogieIcfgContainer [2018-09-23 19:34:50,671 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:34:50,672 INFO L168 Benchmark]: Toolchain (without parser) took 239157.99 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 175.1 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -9.6 MB). Peak memory consumption was 165.5 MB. Max. memory is 7.1 GB. [2018-09-23 19:34:50,673 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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. [2018-09-23 19:34:50,673 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.92 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. [2018-09-23 19:34:50,674 INFO L168 Benchmark]: Boogie Preprocessor took 29.48 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. [2018-09-23 19:34:50,674 INFO L168 Benchmark]: RCFGBuilder took 404.79 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:34:50,675 INFO L168 Benchmark]: TraceAbstraction took 238670.10 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 175.1 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -30.8 MB). Peak memory consumption was 144.3 MB. Max. memory is 7.1 GB. [2018-09-23 19:34:50,678 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 0.20 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 46.92 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 29.48 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 404.79 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 238670.10 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 175.1 MB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -30.8 MB). Peak memory consumption was 144.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 44]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 44). Cancelled while BasicCegarLoop was analyzing trace of length 254 with TraceHistMax 50, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 49 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 238.5s OverallTime, 52 OverallIterations, 50 TraceHistogramMax, 26.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 515 SDtfs, 17401 SDslu, 15104 SDs, 0 SdLazy, 15359 SolverSat, 3186 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8775 GetRequests, 3775 SyntacticMatches, 0 SemanticMatches, 5000 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383376 ImplicationChecksByTransitivity, 194.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=254occurred in iteration=51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 51 MinimizatonAttempts, 201 StatesRemovedByMinimization, 50 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 204.2s InterpolantComputationTime, 12555 NumberOfCodeBlocks, 12555 NumberOfCodeBlocksAsserted, 732 NumberOfCheckSat, 12455 ConstructedInterpolants, 6174 QuantifiedInterpolants, 20383669 SizeOfPredicates, 1372 NumberOfNonLiveVariables, 10584 ConjunctsInSsa, 2646 ConjunctsInUnsatCore, 100 InterpolantComputations, 2 PerfectInterpolantSequences, 1/198451 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/GateController.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-34-50-688.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/GateController.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-34-50-688.csv Completed graceful shutdown