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-d19836b [2018-09-26 21:12:00,441 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:12:00,443 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:12:00,460 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:12:00,461 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:12:00,463 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:12:00,464 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:12:00,466 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:12:00,468 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:12:00,469 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:12:00,477 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:12:00,519 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 [2018-09-26 21:12:00,549 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:12:00,550 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:12:00,552 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:12:00,552 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:12:00,553 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:12:00,553 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:12:00,553 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:12:00,553 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:12:00,554 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:12:00,554 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:12:00,554 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:12:00,554 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:12:00,554 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:12:00,555 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:12:00,555 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:12:00,555 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:12:00,555 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:12:00,557 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:12:00,557 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:12:00,557 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:12:00,557 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:12:00,558 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:12:00,558 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:12:00,558 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:12:00,558 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:12:00,559 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:12:00,559 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:12:00,559 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:12:00,559 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:12:00,559 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:12:00,643 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:12:00,656 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:12:00,660 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:12:00,662 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:12:00,663 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:12:00,664 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/GateController.bpl [2018-09-26 21:12:00,664 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/GateController.bpl' [2018-09-26 21:12:00,721 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:12:00,724 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:12:00,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:12:00,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:12:00,726 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:12:00,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:00" (1/1) ... [2018-09-26 21:12:00,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:00" (1/1) ... [2018-09-26 21:12:00,770 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-26 21:12:00,770 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-26 21:12:00,771 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-26 21:12:00,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:12:00,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:12:00,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:12:00,774 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:12:00,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:00" (1/1) ... [2018-09-26 21:12:00,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:00" (1/1) ... [2018-09-26 21:12:00,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:00" (1/1) ... [2018-09-26 21:12:00,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:00" (1/1) ... [2018-09-26 21:12:00,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:00" (1/1) ... [2018-09-26 21:12:00,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:00" (1/1) ... [2018-09-26 21:12:00,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:00" (1/1) ... [2018-09-26 21:12:00,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:12:00,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:12:00,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:12:00,801 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:12:00,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:12:00,879 INFO L124 BoogieDeclarations]: Specification and implementation of procedure GateController given in one single declaration [2018-09-26 21:12:00,880 INFO L130 BoogieDeclarations]: Found specification of procedure GateController [2018-09-26 21:12:00,880 INFO L138 BoogieDeclarations]: Found implementation of procedure GateController [2018-09-26 21:12:01,211 INFO L343 CfgBuilder]: Using library mode [2018-09-26 21:12:01,212 INFO L202 PluginConnector]: Adding new model GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:12:01 BoogieIcfgContainer [2018-09-26 21:12:01,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:12:01,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:12:01,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:12:01,217 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:12:01,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GateController.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:12:00" (1/2) ... [2018-09-26 21:12:01,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab2b050 and model type GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:12:01, skipping insertion in model container [2018-09-26 21:12:01,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:12:01" (2/2) ... [2018-09-26 21:12:01,222 INFO L112 eAbstractionObserver]: Analyzing ICFG GateController.bpl [2018-09-26 21:12:01,235 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:12:01,249 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:12:01,306 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:12:01,307 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:12:01,308 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:12:01,308 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:12:01,308 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:12:01,308 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:12:01,308 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:12:01,309 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:12:01,309 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:12:01,329 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-09-26 21:12:01,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-26 21:12:01,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:01,341 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-26 21:12:01,343 INFO L423 AbstractCegarLoop]: === Iteration 1 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:01,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:01,348 INFO L82 PathProgramCache]: Analyzing trace with hash 30432, now seen corresponding path program 1 times [2018-09-26 21:12:01,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:01,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:01,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:01,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:01,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:01,495 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:12:01,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:12:01,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:12:01,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:12:01,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:12:01,518 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-09-26 21:12:01,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:01,610 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2018-09-26 21:12:01,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:12:01,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-26 21:12:01,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:01,628 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:12:01,628 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:12:01,631 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 [2018-09-26 21:12:01,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:12:01,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-09-26 21:12:01,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:12:01,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2018-09-26 21:12:01,684 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 3 [2018-09-26 21:12:01,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:01,684 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2018-09-26 21:12:01,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:12:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2018-09-26 21:12:01,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:12:01,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:01,685 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:12:01,686 INFO L423 AbstractCegarLoop]: === Iteration 2 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:01,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:01,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1953617644, now seen corresponding path program 1 times [2018-09-26 21:12:01,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:01,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:01,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:01,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:01,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:01,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:01,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:01,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:01,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:02,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:02,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-09-26 21:12:02,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:12:02,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:12:02,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:12:02,359 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 8 states. [2018-09-26 21:12:02,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:02,472 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2018-09-26 21:12:02,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:12:02,473 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-26 21:12:02,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:02,474 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:12:02,474 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:12:02,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:12:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:12:02,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-09-26 21:12:02,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:12:02,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2018-09-26 21:12:02,482 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2018-09-26 21:12:02,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:02,482 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2018-09-26 21:12:02,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:12:02,483 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2018-09-26 21:12:02,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:12:02,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:02,484 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:12:02,484 INFO L423 AbstractCegarLoop]: === Iteration 3 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:02,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:02,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1953558062, now seen corresponding path program 1 times [2018-09-26 21:12:02,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:02,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:02,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:02,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:02,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:02,556 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:12:02,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:12:02,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:12:02,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:12:02,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:12:02,557 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 3 states. [2018-09-26 21:12:02,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:02,594 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2018-09-26 21:12:02,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:12:02,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-09-26 21:12:02,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:02,596 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:12:02,596 INFO L226 Difference]: Without dead ends: 14 [2018-09-26 21:12:02,597 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 [2018-09-26 21:12:02,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-26 21:12:02,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-26 21:12:02,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:12:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-26 21:12:02,601 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2018-09-26 21:12:02,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:02,602 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-26 21:12:02,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:12:02,602 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-26 21:12:02,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:12:02,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:02,603 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2018-09-26 21:12:02,603 INFO L423 AbstractCegarLoop]: === Iteration 4 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:02,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:02,604 INFO L82 PathProgramCache]: Analyzing trace with hash 72785504, now seen corresponding path program 2 times [2018-09-26 21:12:02,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:02,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:02,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:02,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:02,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:02,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:02,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:02,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:12:02,901 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:12:02,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:02,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:03,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:03,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-26 21:12:03,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:12:03,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:12:03,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:12:03,188 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 12 states. [2018-09-26 21:12:03,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:03,324 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2018-09-26 21:12:03,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:12:03,325 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2018-09-26 21:12:03,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:03,327 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:12:03,327 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:12:03,328 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 [2018-09-26 21:12:03,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:12:03,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-09-26 21:12:03,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:12:03,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2018-09-26 21:12:03,334 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2018-09-26 21:12:03,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:03,334 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2018-09-26 21:12:03,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:12:03,334 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2018-09-26 21:12:03,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:12:03,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:03,335 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1] [2018-09-26 21:12:03,336 INFO L423 AbstractCegarLoop]: === Iteration 5 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:03,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:03,336 INFO L82 PathProgramCache]: Analyzing trace with hash 491282284, now seen corresponding path program 3 times [2018-09-26 21:12:03,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:03,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:03,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:03,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:03,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:03,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:03,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:03,499 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:12:03,535 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:12:03,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:03,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:04,249 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:04,249 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-09-26 21:12:04,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:12:04,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:12:04,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:12:04,252 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 16 states. [2018-09-26 21:12:04,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:04,386 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2018-09-26 21:12:04,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:12:04,389 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-26 21:12:04,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:04,389 INFO L225 Difference]: With dead ends: 30 [2018-09-26 21:12:04,390 INFO L226 Difference]: Without dead ends: 28 [2018-09-26 21:12:04,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:12:04,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-26 21:12:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2018-09-26 21:12:04,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:12:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-09-26 21:12:04,397 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 18 [2018-09-26 21:12:04,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:04,397 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-09-26 21:12:04,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:12:04,398 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-09-26 21:12:04,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-26 21:12:04,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:04,399 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1] [2018-09-26 21:12:04,399 INFO L423 AbstractCegarLoop]: === Iteration 6 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:04,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:04,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1589732832, now seen corresponding path program 4 times [2018-09-26 21:12:04,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:04,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:04,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:04,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:04,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:04,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:04,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:04,608 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:12:04,622 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:12:04,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:04,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:04,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:04,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-26 21:12:04,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:12:04,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:12:04,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:12:04,996 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 20 states. [2018-09-26 21:12:05,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:05,362 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-09-26 21:12:05,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:12:05,363 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2018-09-26 21:12:05,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:05,364 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:12:05,364 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:12:05,365 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 [2018-09-26 21:12:05,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:12:05,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2018-09-26 21:12:05,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:12:05,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2018-09-26 21:12:05,371 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 23 [2018-09-26 21:12:05,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:05,371 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2018-09-26 21:12:05,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:12:05,372 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2018-09-26 21:12:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:12:05,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:05,373 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1] [2018-09-26 21:12:05,373 INFO L423 AbstractCegarLoop]: === Iteration 7 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:05,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:05,373 INFO L82 PathProgramCache]: Analyzing trace with hash 602818540, now seen corresponding path program 5 times [2018-09-26 21:12:05,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:05,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:05,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:05,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:05,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:05,699 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:05,699 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:05,707 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:12:05,727 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:12:05,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:05,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:06,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:06,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-09-26 21:12:06,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:12:06,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:12:06,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:12:06,473 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 24 states. [2018-09-26 21:12:06,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:06,600 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2018-09-26 21:12:06,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:12:06,602 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2018-09-26 21:12:06,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:06,603 INFO L225 Difference]: With dead ends: 40 [2018-09-26 21:12:06,603 INFO L226 Difference]: Without dead ends: 38 [2018-09-26 21:12:06,604 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 [2018-09-26 21:12:06,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-26 21:12:06,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2018-09-26 21:12:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:12:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2018-09-26 21:12:06,610 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 28 [2018-09-26 21:12:06,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:06,610 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2018-09-26 21:12:06,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:12:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2018-09-26 21:12:06,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-26 21:12:06,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:06,612 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1] [2018-09-26 21:12:06,612 INFO L423 AbstractCegarLoop]: === Iteration 8 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:06,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:06,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1979239776, now seen corresponding path program 6 times [2018-09-26 21:12:06,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:06,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:06,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:06,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:06,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:06,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:06,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:06,890 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:12:06,931 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:12:06,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:06,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:07,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:07,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2018-09-26 21:12:07,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:12:07,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:12:07,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=528, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:12:07,540 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 28 states. [2018-09-26 21:12:07,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:07,719 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2018-09-26 21:12:07,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:12:07,722 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2018-09-26 21:12:07,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:07,723 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:12:07,723 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:12:07,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=228, Invalid=528, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:12:07,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:12:07,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-09-26 21:12:07,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:12:07,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2018-09-26 21:12:07,731 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 33 [2018-09-26 21:12:07,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:07,731 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2018-09-26 21:12:07,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:12:07,732 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2018-09-26 21:12:07,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:12:07,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:07,733 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1] [2018-09-26 21:12:07,733 INFO L423 AbstractCegarLoop]: === Iteration 9 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:07,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:07,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1800695700, now seen corresponding path program 7 times [2018-09-26 21:12:07,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:07,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:07,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:07,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:07,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:08,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:08,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:08,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:08,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:08,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:08,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-09-26 21:12:08,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:12:08,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:12:08,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=699, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:12:08,719 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 32 states. [2018-09-26 21:12:08,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:08,881 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2018-09-26 21:12:08,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:12:08,883 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 38 [2018-09-26 21:12:08,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:08,884 INFO L225 Difference]: With dead ends: 50 [2018-09-26 21:12:08,884 INFO L226 Difference]: Without dead ends: 48 [2018-09-26 21:12:08,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=293, Invalid=699, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:12:08,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-26 21:12:08,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2018-09-26 21:12:08,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-26 21:12:08,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2018-09-26 21:12:08,891 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 38 [2018-09-26 21:12:08,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:08,891 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2018-09-26 21:12:08,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:12:08,892 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2018-09-26 21:12:08,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-26 21:12:08,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:08,893 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1] [2018-09-26 21:12:08,893 INFO L423 AbstractCegarLoop]: === Iteration 10 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:08,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:08,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1430989600, now seen corresponding path program 8 times [2018-09-26 21:12:08,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:08,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:08,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:08,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:08,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:09,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:09,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:09,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:12:09,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:12:09,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:09,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:09,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:09,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2018-09-26 21:12:09,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:12:09,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:12:09,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:12:09,811 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 36 states. [2018-09-26 21:12:10,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:10,064 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2018-09-26 21:12:10,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:12:10,065 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2018-09-26 21:12:10,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:10,066 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:12:10,066 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:12:10,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:12:10,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:12:10,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2018-09-26 21:12:10,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:12:10,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2018-09-26 21:12:10,074 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 43 [2018-09-26 21:12:10,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:10,075 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2018-09-26 21:12:10,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:12:10,075 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2018-09-26 21:12:10,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:12:10,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:10,079 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1] [2018-09-26 21:12:10,080 INFO L423 AbstractCegarLoop]: === Iteration 11 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:10,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:10,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1043842836, now seen corresponding path program 9 times [2018-09-26 21:12:10,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:10,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:10,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:10,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:10,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:10,606 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:10,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:10,614 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:12:10,643 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-26 21:12:10,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:10,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:11,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:11,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2018-09-26 21:12:11,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:12:11,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:12:11,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:12:11,744 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 40 states. [2018-09-26 21:12:11,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:11,994 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2018-09-26 21:12:11,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:12:11,995 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2018-09-26 21:12:11,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:11,996 INFO L225 Difference]: With dead ends: 60 [2018-09-26 21:12:11,996 INFO L226 Difference]: Without dead ends: 58 [2018-09-26 21:12:11,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:12:11,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-26 21:12:12,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2018-09-26 21:12:12,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-26 21:12:12,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2018-09-26 21:12:12,002 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 48 [2018-09-26 21:12:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:12,003 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2018-09-26 21:12:12,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:12:12,003 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2018-09-26 21:12:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-26 21:12:12,004 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:12,004 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1] [2018-09-26 21:12:12,004 INFO L423 AbstractCegarLoop]: === Iteration 12 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:12,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:12,005 INFO L82 PathProgramCache]: Analyzing trace with hash -676496288, now seen corresponding path program 10 times [2018-09-26 21:12:12,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:12,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:12,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:12,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:12,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:12,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:12,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:12,525 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:12:12,563 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:12:12,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:12,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:13,254 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:13,254 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2018-09-26 21:12:13,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:12:13,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:12:13,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=1356, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:12:13,257 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 44 states. [2018-09-26 21:12:13,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:13,574 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2018-09-26 21:12:13,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:12:13,574 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 53 [2018-09-26 21:12:13,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:13,576 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:12:13,576 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:12:13,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=536, Invalid=1356, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:12:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:12:13,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-09-26 21:12:13,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:12:13,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2018-09-26 21:12:13,584 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 53 [2018-09-26 21:12:13,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:13,584 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2018-09-26 21:12:13,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:12:13,585 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2018-09-26 21:12:13,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:12:13,585 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:13,586 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1] [2018-09-26 21:12:13,586 INFO L423 AbstractCegarLoop]: === Iteration 13 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:13,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:13,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1014218388, now seen corresponding path program 11 times [2018-09-26 21:12:13,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:13,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:13,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:13,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:13,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:13,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:13,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:13,995 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:12:14,016 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-26 21:12:14,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:14,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:14,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:14,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2018-09-26 21:12:14,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:12:14,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:12:14,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=1623, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:12:14,887 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 48 states. [2018-09-26 21:12:15,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:15,140 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2018-09-26 21:12:15,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:12:15,141 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 58 [2018-09-26 21:12:15,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:15,142 INFO L225 Difference]: With dead ends: 70 [2018-09-26 21:12:15,142 INFO L226 Difference]: Without dead ends: 68 [2018-09-26 21:12:15,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=633, Invalid=1623, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:12:15,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-26 21:12:15,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2018-09-26 21:12:15,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-26 21:12:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2018-09-26 21:12:15,149 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 58 [2018-09-26 21:12:15,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:15,150 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2018-09-26 21:12:15,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:12:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2018-09-26 21:12:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-26 21:12:15,151 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:15,151 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1] [2018-09-26 21:12:15,151 INFO L423 AbstractCegarLoop]: === Iteration 14 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:15,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:15,152 INFO L82 PathProgramCache]: Analyzing trace with hash -778386464, now seen corresponding path program 12 times [2018-09-26 21:12:15,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:15,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:15,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:15,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:15,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:15,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:15,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:15,953 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:12:15,977 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:12:15,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:15,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:17,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:17,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2018-09-26 21:12:17,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:12:17,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:12:17,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=1914, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:12:17,126 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 52 states. [2018-09-26 21:12:17,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:17,293 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2018-09-26 21:12:17,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:12:17,294 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 63 [2018-09-26 21:12:17,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:17,295 INFO L225 Difference]: With dead ends: 75 [2018-09-26 21:12:17,295 INFO L226 Difference]: Without dead ends: 73 [2018-09-26 21:12:17,296 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 [2018-09-26 21:12:17,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-26 21:12:17,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-09-26 21:12:17,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-26 21:12:17,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2018-09-26 21:12:17,303 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 63 [2018-09-26 21:12:17,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:17,303 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2018-09-26 21:12:17,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:12:17,303 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2018-09-26 21:12:17,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:12:17,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:17,304 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1] [2018-09-26 21:12:17,305 INFO L423 AbstractCegarLoop]: === Iteration 15 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:17,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:17,305 INFO L82 PathProgramCache]: Analyzing trace with hash -130045460, now seen corresponding path program 13 times [2018-09-26 21:12:17,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:17,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:17,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:17,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:17,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:17,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:17,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:17,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:17,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:19,034 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:19,035 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 55 [2018-09-26 21:12:19,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:12:19,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:12:19,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=851, Invalid=2229, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:12:19,037 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 56 states. [2018-09-26 21:12:19,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:19,255 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2018-09-26 21:12:19,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:12:19,256 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 68 [2018-09-26 21:12:19,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:19,257 INFO L225 Difference]: With dead ends: 80 [2018-09-26 21:12:19,257 INFO L226 Difference]: Without dead ends: 78 [2018-09-26 21:12:19,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=851, Invalid=2229, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:12:19,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-26 21:12:19,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2018-09-26 21:12:19,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-26 21:12:19,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2018-09-26 21:12:19,267 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 68 [2018-09-26 21:12:19,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:19,267 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2018-09-26 21:12:19,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:12:19,267 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2018-09-26 21:12:19,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-26 21:12:19,268 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:19,268 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1] [2018-09-26 21:12:19,269 INFO L423 AbstractCegarLoop]: === Iteration 16 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:19,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:19,269 INFO L82 PathProgramCache]: Analyzing trace with hash -415978656, now seen corresponding path program 14 times [2018-09-26 21:12:19,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:19,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:19,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:19,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:19,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:19,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:19,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:19,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:12:19,843 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:12:19,844 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:19,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:21,035 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:21,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 59 [2018-09-26 21:12:21,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:12:21,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:12:21,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=972, Invalid=2568, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:12:21,038 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 60 states. [2018-09-26 21:12:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:21,316 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2018-09-26 21:12:21,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:12:21,317 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 73 [2018-09-26 21:12:21,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:21,318 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:12:21,318 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:12:21,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=972, Invalid=2568, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:12:21,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:12:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-09-26 21:12:21,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-26 21:12:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2018-09-26 21:12:21,325 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 73 [2018-09-26 21:12:21,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:21,326 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2018-09-26 21:12:21,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:12:21,326 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2018-09-26 21:12:21,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:12:21,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:21,327 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1] [2018-09-26 21:12:21,327 INFO L423 AbstractCegarLoop]: === Iteration 17 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:21,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:21,328 INFO L82 PathProgramCache]: Analyzing trace with hash -2077592980, now seen corresponding path program 15 times [2018-09-26 21:12:21,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:21,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:21,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:21,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:21,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:21,823 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:21,823 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:21,830 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:12:21,855 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-26 21:12:21,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:21,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:22,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:22,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-09-26 21:12:22,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:12:22,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:12:22,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1101, Invalid=2931, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:12:22,760 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 64 states. [2018-09-26 21:12:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:23,184 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2018-09-26 21:12:23,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:12:23,189 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 78 [2018-09-26 21:12:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:23,190 INFO L225 Difference]: With dead ends: 90 [2018-09-26 21:12:23,190 INFO L226 Difference]: Without dead ends: 88 [2018-09-26 21:12:23,192 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 [2018-09-26 21:12:23,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-26 21:12:23,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2018-09-26 21:12:23,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-26 21:12:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2018-09-26 21:12:23,197 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 78 [2018-09-26 21:12:23,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:23,197 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2018-09-26 21:12:23,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:12:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2018-09-26 21:12:23,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-26 21:12:23,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:23,198 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1] [2018-09-26 21:12:23,199 INFO L423 AbstractCegarLoop]: === Iteration 18 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:23,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:23,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1630745312, now seen corresponding path program 16 times [2018-09-26 21:12:23,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:23,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:23,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:23,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:23,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:23,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:23,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:23,762 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:12:23,784 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:12:23,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:23,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:25,029 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:25,029 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 67 [2018-09-26 21:12:25,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:12:25,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:12:25,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1238, Invalid=3318, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:12:25,032 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 68 states. [2018-09-26 21:12:25,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:25,496 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2018-09-26 21:12:25,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:12:25,496 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 83 [2018-09-26 21:12:25,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:25,497 INFO L225 Difference]: With dead ends: 95 [2018-09-26 21:12:25,497 INFO L226 Difference]: Without dead ends: 93 [2018-09-26 21:12:25,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1238, Invalid=3318, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:12:25,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-26 21:12:25,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-09-26 21:12:25,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-26 21:12:25,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2018-09-26 21:12:25,505 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 83 [2018-09-26 21:12:25,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:25,506 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2018-09-26 21:12:25,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:12:25,506 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2018-09-26 21:12:25,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:12:25,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:25,511 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1] [2018-09-26 21:12:25,511 INFO L423 AbstractCegarLoop]: === Iteration 19 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:25,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:25,512 INFO L82 PathProgramCache]: Analyzing trace with hash -778790164, now seen corresponding path program 17 times [2018-09-26 21:12:25,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:25,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:25,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:25,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:25,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:27,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:27,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:27,052 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:12:27,089 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-26 21:12:27,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:27,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:28,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:28,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 71 [2018-09-26 21:12:28,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:12:28,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:12:28,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=3729, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:12:28,312 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 72 states. [2018-09-26 21:12:28,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:28,564 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2018-09-26 21:12:28,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:12:28,565 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 88 [2018-09-26 21:12:28,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:28,566 INFO L225 Difference]: With dead ends: 100 [2018-09-26 21:12:28,566 INFO L226 Difference]: Without dead ends: 98 [2018-09-26 21:12:28,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2736 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1383, Invalid=3729, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:12:28,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-26 21:12:28,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2018-09-26 21:12:28,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-26 21:12:28,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2018-09-26 21:12:28,572 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 88 [2018-09-26 21:12:28,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:28,573 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2018-09-26 21:12:28,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:12:28,573 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2018-09-26 21:12:28,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-26 21:12:28,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:28,574 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1] [2018-09-26 21:12:28,574 INFO L423 AbstractCegarLoop]: === Iteration 20 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:28,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:28,574 INFO L82 PathProgramCache]: Analyzing trace with hash 38689376, now seen corresponding path program 18 times [2018-09-26 21:12:28,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:28,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:28,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:28,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:28,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:29,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:29,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:29,206 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:12:29,267 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:12:29,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:29,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:30,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:30,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 75 [2018-09-26 21:12:30,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:12:30,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:12:30,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1536, Invalid=4164, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:12:30,709 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 76 states. [2018-09-26 21:12:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:31,050 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2018-09-26 21:12:31,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:12:31,051 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 93 [2018-09-26 21:12:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:31,051 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:12:31,051 INFO L226 Difference]: Without dead ends: 103 [2018-09-26 21:12:31,052 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 [2018-09-26 21:12:31,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-26 21:12:31,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-09-26 21:12:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-26 21:12:31,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2018-09-26 21:12:31,056 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 93 [2018-09-26 21:12:31,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:31,056 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2018-09-26 21:12:31,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-26 21:12:31,057 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2018-09-26 21:12:31,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:12:31,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:31,057 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1] [2018-09-26 21:12:31,058 INFO L423 AbstractCegarLoop]: === Iteration 21 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:31,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:31,058 INFO L82 PathProgramCache]: Analyzing trace with hash 281420652, now seen corresponding path program 19 times [2018-09-26 21:12:31,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:31,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:31,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:31,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:31,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:31,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:31,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:31,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:31,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:33,249 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:33,249 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 79 [2018-09-26 21:12:33,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:12:33,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:12:33,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1697, Invalid=4623, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:12:33,251 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 80 states. [2018-09-26 21:12:33,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:33,546 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2018-09-26 21:12:33,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:12:33,547 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 98 [2018-09-26 21:12:33,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:33,547 INFO L225 Difference]: With dead ends: 110 [2018-09-26 21:12:33,548 INFO L226 Difference]: Without dead ends: 108 [2018-09-26 21:12:33,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3419 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1697, Invalid=4623, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:12:33,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-26 21:12:33,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2018-09-26 21:12:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-26 21:12:33,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2018-09-26 21:12:33,553 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 98 [2018-09-26 21:12:33,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:33,553 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2018-09-26 21:12:33,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-26 21:12:33,553 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2018-09-26 21:12:33,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-26 21:12:33,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:33,554 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1] [2018-09-26 21:12:33,555 INFO L423 AbstractCegarLoop]: === Iteration 22 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:33,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:33,555 INFO L82 PathProgramCache]: Analyzing trace with hash -2025971232, now seen corresponding path program 20 times [2018-09-26 21:12:33,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:33,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:33,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:33,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:33,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:34,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:34,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:34,373 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:12:34,398 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:12:34,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:34,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:37,808 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:37,809 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 83 [2018-09-26 21:12:37,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-26 21:12:37,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-26 21:12:37,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1866, Invalid=5106, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:12:37,811 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand 84 states. [2018-09-26 21:12:38,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:38,121 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2018-09-26 21:12:38,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:12:38,123 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 103 [2018-09-26 21:12:38,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:38,124 INFO L225 Difference]: With dead ends: 115 [2018-09-26 21:12:38,124 INFO L226 Difference]: Without dead ends: 113 [2018-09-26 21:12:38,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3789 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1866, Invalid=5106, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:12:38,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-26 21:12:38,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2018-09-26 21:12:38,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-26 21:12:38,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2018-09-26 21:12:38,131 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 103 [2018-09-26 21:12:38,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:38,131 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2018-09-26 21:12:38,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-26 21:12:38,131 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2018-09-26 21:12:38,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-26 21:12:38,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:38,132 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1] [2018-09-26 21:12:38,132 INFO L423 AbstractCegarLoop]: === Iteration 23 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:38,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:38,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1207497748, now seen corresponding path program 21 times [2018-09-26 21:12:38,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:38,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:38,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:38,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:38,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:39,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:39,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:39,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:12:39,131 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-26 21:12:39,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:39,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:40,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:40,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 87 [2018-09-26 21:12:40,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-26 21:12:40,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-26 21:12:40,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2043, Invalid=5613, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:12:40,502 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand 88 states. [2018-09-26 21:12:40,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:40,895 INFO L93 Difference]: Finished difference Result 120 states and 143 transitions. [2018-09-26 21:12:40,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:12:40,896 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 108 [2018-09-26 21:12:40,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:40,897 INFO L225 Difference]: With dead ends: 120 [2018-09-26 21:12:40,897 INFO L226 Difference]: Without dead ends: 118 [2018-09-26 21:12:40,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4178 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2043, Invalid=5613, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:12:40,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-26 21:12:40,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2018-09-26 21:12:40,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-26 21:12:40,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2018-09-26 21:12:40,903 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 108 [2018-09-26 21:12:40,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:40,904 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2018-09-26 21:12:40,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-26 21:12:40,904 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2018-09-26 21:12:40,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-26 21:12:40,905 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:40,905 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1] [2018-09-26 21:12:40,905 INFO L423 AbstractCegarLoop]: === Iteration 24 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:40,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:40,906 INFO L82 PathProgramCache]: Analyzing trace with hash 649759072, now seen corresponding path program 22 times [2018-09-26 21:12:40,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:40,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:40,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:40,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:40,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:41,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:41,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:41,961 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:12:41,989 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:12:41,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:41,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:43,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:43,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 91 [2018-09-26 21:12:43,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-26 21:12:43,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-26 21:12:43,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2228, Invalid=6144, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:12:43,485 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand 92 states. [2018-09-26 21:12:43,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:43,833 INFO L93 Difference]: Finished difference Result 125 states and 149 transitions. [2018-09-26 21:12:43,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:12:43,833 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 113 [2018-09-26 21:12:43,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:43,835 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:12:43,835 INFO L226 Difference]: Without dead ends: 123 [2018-09-26 21:12:43,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4586 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2228, Invalid=6144, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:12:43,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-26 21:12:43,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-09-26 21:12:43,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-26 21:12:43,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2018-09-26 21:12:43,841 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 113 [2018-09-26 21:12:43,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:43,842 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2018-09-26 21:12:43,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-26 21:12:43,842 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2018-09-26 21:12:43,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-26 21:12:43,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:43,843 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1] [2018-09-26 21:12:43,843 INFO L423 AbstractCegarLoop]: === Iteration 25 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:43,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:43,843 INFO L82 PathProgramCache]: Analyzing trace with hash 60773484, now seen corresponding path program 23 times [2018-09-26 21:12:43,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:43,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:43,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:43,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:43,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:44,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:44,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:44,794 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:12:44,830 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-26 21:12:44,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:44,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:46,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:46,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2018-09-26 21:12:46,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-26 21:12:46,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-26 21:12:46,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2421, Invalid=6699, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:12:46,761 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand 96 states. [2018-09-26 21:12:47,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:47,194 INFO L93 Difference]: Finished difference Result 130 states and 155 transitions. [2018-09-26 21:12:47,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:12:47,195 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 118 [2018-09-26 21:12:47,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:47,196 INFO L225 Difference]: With dead ends: 130 [2018-09-26 21:12:47,196 INFO L226 Difference]: Without dead ends: 128 [2018-09-26 21:12:47,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5013 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2421, Invalid=6699, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:12:47,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-26 21:12:47,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2018-09-26 21:12:47,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-26 21:12:47,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2018-09-26 21:12:47,200 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 118 [2018-09-26 21:12:47,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:47,201 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2018-09-26 21:12:47,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-26 21:12:47,201 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2018-09-26 21:12:47,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-26 21:12:47,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:47,202 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1] [2018-09-26 21:12:47,202 INFO L423 AbstractCegarLoop]: === Iteration 26 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:47,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:47,202 INFO L82 PathProgramCache]: Analyzing trace with hash 293310688, now seen corresponding path program 24 times [2018-09-26 21:12:47,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:47,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:47,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:47,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:47,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:48,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:48,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:48,193 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:12:48,231 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-26 21:12:48,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:48,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:50,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:50,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 99 [2018-09-26 21:12:50,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-26 21:12:50,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-26 21:12:50,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2622, Invalid=7278, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:12:50,028 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand 100 states. [2018-09-26 21:12:50,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:50,528 INFO L93 Difference]: Finished difference Result 135 states and 161 transitions. [2018-09-26 21:12:50,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:12:50,529 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 123 [2018-09-26 21:12:50,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:50,530 INFO L225 Difference]: With dead ends: 135 [2018-09-26 21:12:50,530 INFO L226 Difference]: Without dead ends: 133 [2018-09-26 21:12:50,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2622, Invalid=7278, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:12:50,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-26 21:12:50,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2018-09-26 21:12:50,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-26 21:12:50,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2018-09-26 21:12:50,538 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 123 [2018-09-26 21:12:50,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:50,538 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2018-09-26 21:12:50,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-26 21:12:50,538 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2018-09-26 21:12:50,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-26 21:12:50,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:50,539 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1] [2018-09-26 21:12:50,539 INFO L423 AbstractCegarLoop]: === Iteration 27 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:50,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:50,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1977023724, now seen corresponding path program 25 times [2018-09-26 21:12:50,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:50,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:50,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:50,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:50,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:51,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:51,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:51,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:51,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:53,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:53,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 103 [2018-09-26 21:12:53,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-26 21:12:53,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-26 21:12:53,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2831, Invalid=7881, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:12:53,783 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand 104 states. [2018-09-26 21:12:54,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:54,187 INFO L93 Difference]: Finished difference Result 140 states and 167 transitions. [2018-09-26 21:12:54,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:12:54,188 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 128 [2018-09-26 21:12:54,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:54,189 INFO L225 Difference]: With dead ends: 140 [2018-09-26 21:12:54,190 INFO L226 Difference]: Without dead ends: 138 [2018-09-26 21:12:54,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5924 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2831, Invalid=7881, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:12:54,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-26 21:12:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2018-09-26 21:12:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-26 21:12:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2018-09-26 21:12:54,195 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 128 [2018-09-26 21:12:54,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:54,196 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2018-09-26 21:12:54,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-26 21:12:54,196 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2018-09-26 21:12:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-26 21:12:54,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:54,197 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1] [2018-09-26 21:12:54,197 INFO L423 AbstractCegarLoop]: === Iteration 28 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:54,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:54,198 INFO L82 PathProgramCache]: Analyzing trace with hash -231131040, now seen corresponding path program 26 times [2018-09-26 21:12:54,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:54,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:54,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:54,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:12:54,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:12:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:55,759 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:12:55,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:12:55,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:12:55,799 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:12:55,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:12:55,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:12:58,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:12:58,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:12:58,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 107 [2018-09-26 21:12:58,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-26 21:12:58,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-26 21:12:58,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3048, Invalid=8508, Unknown=0, NotChecked=0, Total=11556 [2018-09-26 21:12:58,271 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand 108 states. [2018-09-26 21:12:59,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:12:59,070 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2018-09-26 21:12:59,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:12:59,071 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 133 [2018-09-26 21:12:59,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:12:59,072 INFO L225 Difference]: With dead ends: 145 [2018-09-26 21:12:59,072 INFO L226 Difference]: Without dead ends: 143 [2018-09-26 21:12:59,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6408 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3048, Invalid=8508, Unknown=0, NotChecked=0, Total=11556 [2018-09-26 21:12:59,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-26 21:12:59,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-09-26 21:12:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-26 21:12:59,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2018-09-26 21:12:59,077 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 133 [2018-09-26 21:12:59,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:12:59,077 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2018-09-26 21:12:59,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-26 21:12:59,077 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2018-09-26 21:12:59,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-26 21:12:59,078 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:12:59,078 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1] [2018-09-26 21:12:59,078 INFO L423 AbstractCegarLoop]: === Iteration 29 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:12:59,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:12:59,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1458963820, now seen corresponding path program 27 times [2018-09-26 21:12:59,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:12:59,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:12:59,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:59,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:12:59,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:12:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:00,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:00,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:00,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:13:00,398 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-26 21:13:00,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:13:00,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:02,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:02,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 111 [2018-09-26 21:13:02,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-26 21:13:02,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-26 21:13:02,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3273, Invalid=9159, Unknown=0, NotChecked=0, Total=12432 [2018-09-26 21:13:02,758 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand 112 states. [2018-09-26 21:13:03,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:03,236 INFO L93 Difference]: Finished difference Result 150 states and 179 transitions. [2018-09-26 21:13:03,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:13:03,237 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 138 [2018-09-26 21:13:03,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:03,238 INFO L225 Difference]: With dead ends: 150 [2018-09-26 21:13:03,238 INFO L226 Difference]: Without dead ends: 148 [2018-09-26 21:13:03,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3273, Invalid=9159, Unknown=0, NotChecked=0, Total=12432 [2018-09-26 21:13:03,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-26 21:13:03,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2018-09-26 21:13:03,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-26 21:13:03,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 172 transitions. [2018-09-26 21:13:03,243 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 172 transitions. Word has length 138 [2018-09-26 21:13:03,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:03,244 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 172 transitions. [2018-09-26 21:13:03,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-26 21:13:03,244 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 172 transitions. [2018-09-26 21:13:03,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-26 21:13:03,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:03,245 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1] [2018-09-26 21:13:03,245 INFO L423 AbstractCegarLoop]: === Iteration 30 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:03,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:03,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1839955936, now seen corresponding path program 28 times [2018-09-26 21:13:03,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:03,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:03,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:03,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:13:03,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:04,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:04,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:04,704 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:13:04,739 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:13:04,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:13:04,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:07,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:07,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 115 [2018-09-26 21:13:07,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-26 21:13:07,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-26 21:13:07,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3506, Invalid=9834, Unknown=0, NotChecked=0, Total=13340 [2018-09-26 21:13:07,267 INFO L87 Difference]: Start difference. First operand 144 states and 172 transitions. Second operand 116 states. [2018-09-26 21:13:07,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:07,895 INFO L93 Difference]: Finished difference Result 155 states and 185 transitions. [2018-09-26 21:13:07,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:13:07,896 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 143 [2018-09-26 21:13:07,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:07,897 INFO L225 Difference]: With dead ends: 155 [2018-09-26 21:13:07,898 INFO L226 Difference]: Without dead ends: 153 [2018-09-26 21:13:07,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7433 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3506, Invalid=9834, Unknown=0, NotChecked=0, Total=13340 [2018-09-26 21:13:07,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-26 21:13:07,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2018-09-26 21:13:07,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-26 21:13:07,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2018-09-26 21:13:07,905 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 143 [2018-09-26 21:13:07,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:07,905 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2018-09-26 21:13:07,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-26 21:13:07,906 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2018-09-26 21:13:07,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-26 21:13:07,906 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:07,907 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1] [2018-09-26 21:13:07,907 INFO L423 AbstractCegarLoop]: === Iteration 31 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:07,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:07,907 INFO L82 PathProgramCache]: Analyzing trace with hash 893677036, now seen corresponding path program 29 times [2018-09-26 21:13:07,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:07,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:07,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:07,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:13:07,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:09,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:09,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:09,399 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:13:09,446 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-26 21:13:09,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:13:09,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:11,917 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:11,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 119 [2018-09-26 21:13:11,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-26 21:13:11,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-26 21:13:11,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3747, Invalid=10533, Unknown=0, NotChecked=0, Total=14280 [2018-09-26 21:13:11,919 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand 120 states. [2018-09-26 21:13:12,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:12,487 INFO L93 Difference]: Finished difference Result 160 states and 191 transitions. [2018-09-26 21:13:12,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:13:12,487 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 148 [2018-09-26 21:13:12,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:12,489 INFO L225 Difference]: With dead ends: 160 [2018-09-26 21:13:12,489 INFO L226 Difference]: Without dead ends: 158 [2018-09-26 21:13:12,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7974 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3747, Invalid=10533, Unknown=0, NotChecked=0, Total=14280 [2018-09-26 21:13:12,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-26 21:13:12,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2018-09-26 21:13:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-26 21:13:12,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 184 transitions. [2018-09-26 21:13:12,495 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 184 transitions. Word has length 148 [2018-09-26 21:13:12,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:12,495 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 184 transitions. [2018-09-26 21:13:12,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-26 21:13:12,496 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 184 transitions. [2018-09-26 21:13:12,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-26 21:13:12,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:12,496 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1] [2018-09-26 21:13:12,496 INFO L423 AbstractCegarLoop]: === Iteration 32 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:12,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:12,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1567987872, now seen corresponding path program 30 times [2018-09-26 21:13:12,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:12,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:12,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:12,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:13:12,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:14,430 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:14,430 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:14,438 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:13:14,488 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-26 21:13:14,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:13:14,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:17,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:17,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 123 [2018-09-26 21:13:17,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-26 21:13:17,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-26 21:13:17,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3996, Invalid=11256, Unknown=0, NotChecked=0, Total=15252 [2018-09-26 21:13:17,179 INFO L87 Difference]: Start difference. First operand 154 states and 184 transitions. Second operand 124 states. [2018-09-26 21:13:17,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:17,727 INFO L93 Difference]: Finished difference Result 165 states and 197 transitions. [2018-09-26 21:13:17,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:13:17,728 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 153 [2018-09-26 21:13:17,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:17,729 INFO L225 Difference]: With dead ends: 165 [2018-09-26 21:13:17,729 INFO L226 Difference]: Without dead ends: 163 [2018-09-26 21:13:17,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8534 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3996, Invalid=11256, Unknown=0, NotChecked=0, Total=15252 [2018-09-26 21:13:17,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-26 21:13:17,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-09-26 21:13:17,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-26 21:13:17,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 190 transitions. [2018-09-26 21:13:17,737 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 190 transitions. Word has length 153 [2018-09-26 21:13:17,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:17,738 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 190 transitions. [2018-09-26 21:13:17,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-26 21:13:17,738 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 190 transitions. [2018-09-26 21:13:17,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-26 21:13:17,739 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:17,739 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1] [2018-09-26 21:13:17,739 INFO L423 AbstractCegarLoop]: === Iteration 33 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:17,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:17,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1695168108, now seen corresponding path program 31 times [2018-09-26 21:13:17,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:17,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:17,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:17,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:13:17,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:19,949 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:19,949 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:19,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:20,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:22,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:22,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 127 [2018-09-26 21:13:22,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-26 21:13:22,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-26 21:13:22,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4253, Invalid=12003, Unknown=0, NotChecked=0, Total=16256 [2018-09-26 21:13:22,944 INFO L87 Difference]: Start difference. First operand 159 states and 190 transitions. Second operand 128 states. [2018-09-26 21:13:23,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:23,537 INFO L93 Difference]: Finished difference Result 170 states and 203 transitions. [2018-09-26 21:13:23,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:13:23,538 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 158 [2018-09-26 21:13:23,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:23,539 INFO L225 Difference]: With dead ends: 170 [2018-09-26 21:13:23,539 INFO L226 Difference]: Without dead ends: 168 [2018-09-26 21:13:23,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9113 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4253, Invalid=12003, Unknown=0, NotChecked=0, Total=16256 [2018-09-26 21:13:23,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-09-26 21:13:23,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2018-09-26 21:13:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-26 21:13:23,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 196 transitions. [2018-09-26 21:13:23,546 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 196 transitions. Word has length 158 [2018-09-26 21:13:23,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:23,547 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 196 transitions. [2018-09-26 21:13:23,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-26 21:13:23,547 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 196 transitions. [2018-09-26 21:13:23,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-26 21:13:23,548 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:23,548 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1] [2018-09-26 21:13:23,548 INFO L423 AbstractCegarLoop]: === Iteration 34 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:23,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:23,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1450316064, now seen corresponding path program 32 times [2018-09-26 21:13:23,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:23,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:23,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:23,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:13:23,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:26,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:26,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:26,672 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:13:26,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:13:26,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:13:26,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:29,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:29,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 131 [2018-09-26 21:13:29,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-26 21:13:29,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-26 21:13:29,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4518, Invalid=12774, Unknown=0, NotChecked=0, Total=17292 [2018-09-26 21:13:29,816 INFO L87 Difference]: Start difference. First operand 164 states and 196 transitions. Second operand 132 states. [2018-09-26 21:13:30,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:30,401 INFO L93 Difference]: Finished difference Result 175 states and 209 transitions. [2018-09-26 21:13:30,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:13:30,401 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 163 [2018-09-26 21:13:30,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:30,403 INFO L225 Difference]: With dead ends: 175 [2018-09-26 21:13:30,403 INFO L226 Difference]: Without dead ends: 173 [2018-09-26 21:13:30,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9711 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4518, Invalid=12774, Unknown=0, NotChecked=0, Total=17292 [2018-09-26 21:13:30,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-26 21:13:30,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2018-09-26 21:13:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-26 21:13:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2018-09-26 21:13:30,412 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 163 [2018-09-26 21:13:30,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:30,412 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2018-09-26 21:13:30,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-26 21:13:30,413 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2018-09-26 21:13:30,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-26 21:13:30,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:30,414 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1] [2018-09-26 21:13:30,414 INFO L423 AbstractCegarLoop]: === Iteration 35 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:30,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:30,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2138087700, now seen corresponding path program 33 times [2018-09-26 21:13:30,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:30,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:30,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:30,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:13:30,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:30,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:32,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:32,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:32,191 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:13:32,270 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-26 21:13:32,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:13:32,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:35,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:35,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 135 [2018-09-26 21:13:35,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-26 21:13:35,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-26 21:13:35,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4791, Invalid=13569, Unknown=0, NotChecked=0, Total=18360 [2018-09-26 21:13:35,412 INFO L87 Difference]: Start difference. First operand 169 states and 202 transitions. Second operand 136 states. [2018-09-26 21:13:36,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:36,051 INFO L93 Difference]: Finished difference Result 180 states and 215 transitions. [2018-09-26 21:13:36,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:13:36,051 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 168 [2018-09-26 21:13:36,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:36,053 INFO L225 Difference]: With dead ends: 180 [2018-09-26 21:13:36,053 INFO L226 Difference]: Without dead ends: 178 [2018-09-26 21:13:36,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10328 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4791, Invalid=13569, Unknown=0, NotChecked=0, Total=18360 [2018-09-26 21:13:36,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-26 21:13:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2018-09-26 21:13:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-09-26 21:13:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 208 transitions. [2018-09-26 21:13:36,061 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 208 transitions. Word has length 168 [2018-09-26 21:13:36,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:36,061 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 208 transitions. [2018-09-26 21:13:36,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-26 21:13:36,061 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 208 transitions. [2018-09-26 21:13:36,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-26 21:13:36,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:36,062 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1] [2018-09-26 21:13:36,063 INFO L423 AbstractCegarLoop]: === Iteration 36 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:36,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:36,063 INFO L82 PathProgramCache]: Analyzing trace with hash 359536224, now seen corresponding path program 34 times [2018-09-26 21:13:36,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:36,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:36,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:36,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:13:36,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:38,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:38,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:38,192 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:13:38,234 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:13:38,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:13:38,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:42,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:42,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 139 [2018-09-26 21:13:42,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-26 21:13:42,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-26 21:13:42,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5072, Invalid=14388, Unknown=0, NotChecked=0, Total=19460 [2018-09-26 21:13:42,368 INFO L87 Difference]: Start difference. First operand 174 states and 208 transitions. Second operand 140 states. [2018-09-26 21:13:43,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:43,963 INFO L93 Difference]: Finished difference Result 185 states and 221 transitions. [2018-09-26 21:13:43,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:13:43,963 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 173 [2018-09-26 21:13:43,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:43,964 INFO L225 Difference]: With dead ends: 185 [2018-09-26 21:13:43,964 INFO L226 Difference]: Without dead ends: 183 [2018-09-26 21:13:43,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10964 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5072, Invalid=14388, Unknown=0, NotChecked=0, Total=19460 [2018-09-26 21:13:43,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-26 21:13:43,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-09-26 21:13:43,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-26 21:13:43,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 214 transitions. [2018-09-26 21:13:43,971 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 214 transitions. Word has length 173 [2018-09-26 21:13:43,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:43,971 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 214 transitions. [2018-09-26 21:13:43,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-26 21:13:43,971 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 214 transitions. [2018-09-26 21:13:43,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-26 21:13:43,972 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:43,972 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1] [2018-09-26 21:13:43,972 INFO L423 AbstractCegarLoop]: === Iteration 37 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:43,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:43,972 INFO L82 PathProgramCache]: Analyzing trace with hash -400824468, now seen corresponding path program 35 times [2018-09-26 21:13:43,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:43,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:43,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:43,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:13:43,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:46,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:46,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:46,241 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:13:46,311 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-26 21:13:46,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:13:46,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:49,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:49,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 143 [2018-09-26 21:13:49,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-26 21:13:49,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-26 21:13:49,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5361, Invalid=15231, Unknown=0, NotChecked=0, Total=20592 [2018-09-26 21:13:49,817 INFO L87 Difference]: Start difference. First operand 179 states and 214 transitions. Second operand 144 states. [2018-09-26 21:13:50,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:50,512 INFO L93 Difference]: Finished difference Result 190 states and 227 transitions. [2018-09-26 21:13:50,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:13:50,513 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 178 [2018-09-26 21:13:50,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:50,514 INFO L225 Difference]: With dead ends: 190 [2018-09-26 21:13:50,514 INFO L226 Difference]: Without dead ends: 188 [2018-09-26 21:13:50,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11619 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5361, Invalid=15231, Unknown=0, NotChecked=0, Total=20592 [2018-09-26 21:13:50,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-09-26 21:13:50,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2018-09-26 21:13:50,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-26 21:13:50,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2018-09-26 21:13:50,522 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 178 [2018-09-26 21:13:50,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:50,522 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2018-09-26 21:13:50,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-26 21:13:50,523 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2018-09-26 21:13:50,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-26 21:13:50,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:50,524 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1] [2018-09-26 21:13:50,524 INFO L423 AbstractCegarLoop]: === Iteration 38 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:50,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:50,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1927470560, now seen corresponding path program 36 times [2018-09-26 21:13:50,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:50,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:50,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:50,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:13:50,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:13:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:53,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:13:53,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:13:53,054 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:13:53,117 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-26 21:13:53,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:13:53,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:13:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:13:57,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:13:57,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 147 [2018-09-26 21:13:57,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-26 21:13:57,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-26 21:13:57,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5658, Invalid=16098, Unknown=0, NotChecked=0, Total=21756 [2018-09-26 21:13:57,128 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand 148 states. [2018-09-26 21:13:57,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:13:57,807 INFO L93 Difference]: Finished difference Result 195 states and 233 transitions. [2018-09-26 21:13:57,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:13:57,808 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 183 [2018-09-26 21:13:57,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:13:57,809 INFO L225 Difference]: With dead ends: 195 [2018-09-26 21:13:57,809 INFO L226 Difference]: Without dead ends: 193 [2018-09-26 21:13:57,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12293 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=5658, Invalid=16098, Unknown=0, NotChecked=0, Total=21756 [2018-09-26 21:13:57,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-26 21:13:57,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2018-09-26 21:13:57,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-26 21:13:57,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 226 transitions. [2018-09-26 21:13:57,816 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 226 transitions. Word has length 183 [2018-09-26 21:13:57,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:13:57,816 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 226 transitions. [2018-09-26 21:13:57,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-26 21:13:57,817 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 226 transitions. [2018-09-26 21:13:57,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-26 21:13:57,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:13:57,818 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1] [2018-09-26 21:13:57,818 INFO L423 AbstractCegarLoop]: === Iteration 39 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:13:57,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:13:57,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1106759660, now seen corresponding path program 37 times [2018-09-26 21:13:57,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:13:57,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:13:57,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:57,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:13:57,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:13:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:02,002 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:02,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:02,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:02,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:14:06,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:06,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:14:06,029 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 151 [2018-09-26 21:14:06,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-26 21:14:06,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-26 21:14:06,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5963, Invalid=16989, Unknown=0, NotChecked=0, Total=22952 [2018-09-26 21:14:06,031 INFO L87 Difference]: Start difference. First operand 189 states and 226 transitions. Second operand 152 states. [2018-09-26 21:14:06,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:06,772 INFO L93 Difference]: Finished difference Result 200 states and 239 transitions. [2018-09-26 21:14:06,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:14:06,772 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 188 [2018-09-26 21:14:06,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:06,773 INFO L225 Difference]: With dead ends: 200 [2018-09-26 21:14:06,773 INFO L226 Difference]: Without dead ends: 198 [2018-09-26 21:14:06,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12986 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=5963, Invalid=16989, Unknown=0, NotChecked=0, Total=22952 [2018-09-26 21:14:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-09-26 21:14:06,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2018-09-26 21:14:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-09-26 21:14:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 232 transitions. [2018-09-26 21:14:06,781 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 232 transitions. Word has length 188 [2018-09-26 21:14:06,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:06,782 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 232 transitions. [2018-09-26 21:14:06,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-26 21:14:06,782 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 232 transitions. [2018-09-26 21:14:06,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-09-26 21:14:06,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:06,783 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1] [2018-09-26 21:14:06,783 INFO L423 AbstractCegarLoop]: === Iteration 40 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:06,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:06,784 INFO L82 PathProgramCache]: Analyzing trace with hash -928758432, now seen corresponding path program 38 times [2018-09-26 21:14:06,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:06,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:06,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:06,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:06,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:10,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:10,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:10,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:14:10,350 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:14:10,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:14:10,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:14:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:14,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:14:14,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 155 [2018-09-26 21:14:14,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-26 21:14:14,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-26 21:14:14,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6276, Invalid=17904, Unknown=0, NotChecked=0, Total=24180 [2018-09-26 21:14:14,734 INFO L87 Difference]: Start difference. First operand 194 states and 232 transitions. Second operand 156 states. [2018-09-26 21:14:15,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:15,511 INFO L93 Difference]: Finished difference Result 205 states and 245 transitions. [2018-09-26 21:14:15,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-26 21:14:15,511 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 193 [2018-09-26 21:14:15,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:15,512 INFO L225 Difference]: With dead ends: 205 [2018-09-26 21:14:15,512 INFO L226 Difference]: Without dead ends: 203 [2018-09-26 21:14:15,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13698 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=6276, Invalid=17904, Unknown=0, NotChecked=0, Total=24180 [2018-09-26 21:14:15,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-26 21:14:15,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-09-26 21:14:15,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-26 21:14:15,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 238 transitions. [2018-09-26 21:14:15,522 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 238 transitions. Word has length 193 [2018-09-26 21:14:15,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:15,522 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 238 transitions. [2018-09-26 21:14:15,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-26 21:14:15,522 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 238 transitions. [2018-09-26 21:14:15,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-26 21:14:15,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:15,524 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1] [2018-09-26 21:14:15,524 INFO L423 AbstractCegarLoop]: === Iteration 41 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:15,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:15,524 INFO L82 PathProgramCache]: Analyzing trace with hash -93644692, now seen corresponding path program 39 times [2018-09-26 21:14:15,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:15,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:15,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:15,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:14:15,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:17,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:17,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:17,870 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:14:17,935 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-26 21:14:17,935 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:14:17,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:14:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:22,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:14:22,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 159 [2018-09-26 21:14:22,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-26 21:14:22,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-26 21:14:22,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6597, Invalid=18843, Unknown=0, NotChecked=0, Total=25440 [2018-09-26 21:14:22,262 INFO L87 Difference]: Start difference. First operand 199 states and 238 transitions. Second operand 160 states. [2018-09-26 21:14:23,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:23,061 INFO L93 Difference]: Finished difference Result 210 states and 251 transitions. [2018-09-26 21:14:23,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-26 21:14:23,061 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 198 [2018-09-26 21:14:23,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:23,063 INFO L225 Difference]: With dead ends: 210 [2018-09-26 21:14:23,063 INFO L226 Difference]: Without dead ends: 208 [2018-09-26 21:14:23,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14429 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=6597, Invalid=18843, Unknown=0, NotChecked=0, Total=25440 [2018-09-26 21:14:23,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-09-26 21:14:23,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2018-09-26 21:14:23,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-09-26 21:14:23,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 244 transitions. [2018-09-26 21:14:23,070 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 244 transitions. Word has length 198 [2018-09-26 21:14:23,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:23,070 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 244 transitions. [2018-09-26 21:14:23,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-26 21:14:23,070 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 244 transitions. [2018-09-26 21:14:23,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-26 21:14:23,071 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:23,071 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1] [2018-09-26 21:14:23,071 INFO L423 AbstractCegarLoop]: === Iteration 42 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:23,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:23,072 INFO L82 PathProgramCache]: Analyzing trace with hash 392842464, now seen corresponding path program 40 times [2018-09-26 21:14:23,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:23,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:23,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:23,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:14:23,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:26,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:26,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:26,535 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:14:26,583 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:14:26,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:14:26,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:14:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:30,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:14:30,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 163 [2018-09-26 21:14:30,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-09-26 21:14:30,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-09-26 21:14:30,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6926, Invalid=19806, Unknown=0, NotChecked=0, Total=26732 [2018-09-26 21:14:30,897 INFO L87 Difference]: Start difference. First operand 204 states and 244 transitions. Second operand 164 states. [2018-09-26 21:14:31,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:31,807 INFO L93 Difference]: Finished difference Result 215 states and 257 transitions. [2018-09-26 21:14:31,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-26 21:14:31,808 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 203 [2018-09-26 21:14:31,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:31,809 INFO L225 Difference]: With dead ends: 215 [2018-09-26 21:14:31,809 INFO L226 Difference]: Without dead ends: 213 [2018-09-26 21:14:31,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15179 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=6926, Invalid=19806, Unknown=0, NotChecked=0, Total=26732 [2018-09-26 21:14:31,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-26 21:14:31,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2018-09-26 21:14:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-26 21:14:31,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 250 transitions. [2018-09-26 21:14:31,816 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 250 transitions. Word has length 203 [2018-09-26 21:14:31,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:31,816 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 250 transitions. [2018-09-26 21:14:31,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-09-26 21:14:31,817 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 250 transitions. [2018-09-26 21:14:31,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-26 21:14:31,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:31,817 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1] [2018-09-26 21:14:31,818 INFO L423 AbstractCegarLoop]: === Iteration 43 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:31,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:31,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1010974484, now seen corresponding path program 41 times [2018-09-26 21:14:31,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:31,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:31,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:31,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:14:31,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:34,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:34,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:34,946 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:14:35,014 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-26 21:14:35,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:14:35,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:14:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:41,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:14:41,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 167 [2018-09-26 21:14:41,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-09-26 21:14:41,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-09-26 21:14:41,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7263, Invalid=20793, Unknown=0, NotChecked=0, Total=28056 [2018-09-26 21:14:41,528 INFO L87 Difference]: Start difference. First operand 209 states and 250 transitions. Second operand 168 states. [2018-09-26 21:14:42,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:42,442 INFO L93 Difference]: Finished difference Result 220 states and 263 transitions. [2018-09-26 21:14:42,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-26 21:14:42,442 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 208 [2018-09-26 21:14:42,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:42,444 INFO L225 Difference]: With dead ends: 220 [2018-09-26 21:14:42,444 INFO L226 Difference]: Without dead ends: 218 [2018-09-26 21:14:42,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15948 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=7263, Invalid=20793, Unknown=0, NotChecked=0, Total=28056 [2018-09-26 21:14:42,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-09-26 21:14:42,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2018-09-26 21:14:42,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-09-26 21:14:42,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 256 transitions. [2018-09-26 21:14:42,450 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 256 transitions. Word has length 208 [2018-09-26 21:14:42,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:42,451 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 256 transitions. [2018-09-26 21:14:42,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-09-26 21:14:42,451 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 256 transitions. [2018-09-26 21:14:42,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-09-26 21:14:42,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:42,452 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1] [2018-09-26 21:14:42,452 INFO L423 AbstractCegarLoop]: === Iteration 44 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:42,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:42,453 INFO L82 PathProgramCache]: Analyzing trace with hash -638782368, now seen corresponding path program 42 times [2018-09-26 21:14:42,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:42,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:42,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:42,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:14:42,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:45,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:45,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:45,356 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:14:45,429 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-26 21:14:45,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:14:45,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:14:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:50,149 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:14:50,149 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 171 [2018-09-26 21:14:50,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-09-26 21:14:50,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-09-26 21:14:50,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7608, Invalid=21804, Unknown=0, NotChecked=0, Total=29412 [2018-09-26 21:14:50,151 INFO L87 Difference]: Start difference. First operand 214 states and 256 transitions. Second operand 172 states. [2018-09-26 21:14:51,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:51,022 INFO L93 Difference]: Finished difference Result 225 states and 269 transitions. [2018-09-26 21:14:51,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-26 21:14:51,022 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 213 [2018-09-26 21:14:51,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:51,023 INFO L225 Difference]: With dead ends: 225 [2018-09-26 21:14:51,023 INFO L226 Difference]: Without dead ends: 223 [2018-09-26 21:14:51,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16736 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=7608, Invalid=21804, Unknown=0, NotChecked=0, Total=29412 [2018-09-26 21:14:51,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-26 21:14:51,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2018-09-26 21:14:51,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-26 21:14:51,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 262 transitions. [2018-09-26 21:14:51,031 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 262 transitions. Word has length 213 [2018-09-26 21:14:51,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:51,031 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 262 transitions. [2018-09-26 21:14:51,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-09-26 21:14:51,031 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 262 transitions. [2018-09-26 21:14:51,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-26 21:14:51,032 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:51,032 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1] [2018-09-26 21:14:51,032 INFO L423 AbstractCegarLoop]: === Iteration 45 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:51,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:51,033 INFO L82 PathProgramCache]: Analyzing trace with hash 372754796, now seen corresponding path program 43 times [2018-09-26 21:14:51,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:51,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:51,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:51,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:14:51,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:53,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:14:53,748 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:14:53,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:14:53,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:14:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:14:58,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:14:58,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 175 [2018-09-26 21:14:58,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 176 states [2018-09-26 21:14:58,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2018-09-26 21:14:58,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7961, Invalid=22839, Unknown=0, NotChecked=0, Total=30800 [2018-09-26 21:14:58,745 INFO L87 Difference]: Start difference. First operand 219 states and 262 transitions. Second operand 176 states. [2018-09-26 21:14:59,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:14:59,723 INFO L93 Difference]: Finished difference Result 230 states and 275 transitions. [2018-09-26 21:14:59,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-26 21:14:59,724 INFO L78 Accepts]: Start accepts. Automaton has 176 states. Word has length 218 [2018-09-26 21:14:59,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:14:59,726 INFO L225 Difference]: With dead ends: 230 [2018-09-26 21:14:59,726 INFO L226 Difference]: Without dead ends: 228 [2018-09-26 21:14:59,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17543 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=7961, Invalid=22839, Unknown=0, NotChecked=0, Total=30800 [2018-09-26 21:14:59,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-09-26 21:14:59,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2018-09-26 21:14:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-09-26 21:14:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 268 transitions. [2018-09-26 21:14:59,732 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 268 transitions. Word has length 218 [2018-09-26 21:14:59,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:14:59,732 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 268 transitions. [2018-09-26 21:14:59,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 176 states. [2018-09-26 21:14:59,732 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 268 transitions. [2018-09-26 21:14:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-09-26 21:14:59,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:14:59,733 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1] [2018-09-26 21:14:59,733 INFO L423 AbstractCegarLoop]: === Iteration 46 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:14:59,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:14:59,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2065417248, now seen corresponding path program 44 times [2018-09-26 21:14:59,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:14:59,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:14:59,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:59,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:14:59,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:14:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:02,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:15:02,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:15:02,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:15:02,567 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:15:02,620 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:15:02,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:15:02,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:15:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:15:07,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:15:07,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 179 [2018-09-26 21:15:07,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-09-26 21:15:07,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-09-26 21:15:07,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8322, Invalid=23898, Unknown=0, NotChecked=0, Total=32220 [2018-09-26 21:15:07,793 INFO L87 Difference]: Start difference. First operand 224 states and 268 transitions. Second operand 180 states. [2018-09-26 21:15:08,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:15:08,870 INFO L93 Difference]: Finished difference Result 235 states and 281 transitions. [2018-09-26 21:15:08,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-26 21:15:08,870 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 223 [2018-09-26 21:15:08,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:15:08,871 INFO L225 Difference]: With dead ends: 235 [2018-09-26 21:15:08,872 INFO L226 Difference]: Without dead ends: 233 [2018-09-26 21:15:08,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18369 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=8322, Invalid=23898, Unknown=0, NotChecked=0, Total=32220 [2018-09-26 21:15:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-09-26 21:15:08,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2018-09-26 21:15:08,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-26 21:15:08,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 274 transitions. [2018-09-26 21:15:08,880 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 274 transitions. Word has length 223 [2018-09-26 21:15:08,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:15:08,880 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 274 transitions. [2018-09-26 21:15:08,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-09-26 21:15:08,881 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 274 transitions. [2018-09-26 21:15:08,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-26 21:15:08,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:15:08,882 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1] [2018-09-26 21:15:08,882 INFO L423 AbstractCegarLoop]: === Iteration 47 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:15:08,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:15:08,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1340001812, now seen corresponding path program 45 times [2018-09-26 21:15:08,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:15:08,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:15:08,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:08,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:15:08,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:15:12,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:15:12,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:15:12,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:15:12,167 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-26 21:15:12,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:15:12,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:15:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:15:17,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:15:17,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 183 [2018-09-26 21:15:17,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 184 states [2018-09-26 21:15:17,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2018-09-26 21:15:17,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8691, Invalid=24981, Unknown=0, NotChecked=0, Total=33672 [2018-09-26 21:15:17,398 INFO L87 Difference]: Start difference. First operand 229 states and 274 transitions. Second operand 184 states. [2018-09-26 21:15:18,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:15:18,391 INFO L93 Difference]: Finished difference Result 240 states and 287 transitions. [2018-09-26 21:15:18,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-26 21:15:18,391 INFO L78 Accepts]: Start accepts. Automaton has 184 states. Word has length 228 [2018-09-26 21:15:18,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:15:18,392 INFO L225 Difference]: With dead ends: 240 [2018-09-26 21:15:18,392 INFO L226 Difference]: Without dead ends: 238 [2018-09-26 21:15:18,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19214 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=8691, Invalid=24981, Unknown=0, NotChecked=0, Total=33672 [2018-09-26 21:15:18,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-09-26 21:15:18,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2018-09-26 21:15:18,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-09-26 21:15:18,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2018-09-26 21:15:18,400 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 228 [2018-09-26 21:15:18,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:15:18,401 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2018-09-26 21:15:18,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 184 states. [2018-09-26 21:15:18,401 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2018-09-26 21:15:18,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-09-26 21:15:18,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:15:18,402 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1] [2018-09-26 21:15:18,403 INFO L423 AbstractCegarLoop]: === Iteration 48 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:15:18,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:15:18,403 INFO L82 PathProgramCache]: Analyzing trace with hash 117973856, now seen corresponding path program 46 times [2018-09-26 21:15:18,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:15:18,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:15:18,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:18,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:15:18,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:15:21,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:15:21,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:15:21,830 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:15:21,901 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:15:21,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:15:21,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:15:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:15:27,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:15:27,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 187 [2018-09-26 21:15:27,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 188 states [2018-09-26 21:15:27,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2018-09-26 21:15:27,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9068, Invalid=26088, Unknown=0, NotChecked=0, Total=35156 [2018-09-26 21:15:27,807 INFO L87 Difference]: Start difference. First operand 234 states and 280 transitions. Second operand 188 states. [2018-09-26 21:15:28,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:15:28,958 INFO L93 Difference]: Finished difference Result 245 states and 293 transitions. [2018-09-26 21:15:28,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-26 21:15:28,958 INFO L78 Accepts]: Start accepts. Automaton has 188 states. Word has length 233 [2018-09-26 21:15:28,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:15:28,959 INFO L225 Difference]: With dead ends: 245 [2018-09-26 21:15:28,959 INFO L226 Difference]: Without dead ends: 243 [2018-09-26 21:15:28,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20078 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=9068, Invalid=26088, Unknown=0, NotChecked=0, Total=35156 [2018-09-26 21:15:28,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-26 21:15:28,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2018-09-26 21:15:28,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-26 21:15:28,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 286 transitions. [2018-09-26 21:15:28,968 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 286 transitions. Word has length 233 [2018-09-26 21:15:28,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:15:28,968 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 286 transitions. [2018-09-26 21:15:28,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 188 states. [2018-09-26 21:15:28,968 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 286 transitions. [2018-09-26 21:15:28,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-26 21:15:28,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:15:28,970 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1] [2018-09-26 21:15:28,970 INFO L423 AbstractCegarLoop]: === Iteration 49 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:15:28,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:15:28,970 INFO L82 PathProgramCache]: Analyzing trace with hash 365034092, now seen corresponding path program 47 times [2018-09-26 21:15:28,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:15:28,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:15:28,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:28,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:15:28,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:15:32,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:15:32,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:15:32,419 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:15:32,516 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-26 21:15:32,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:15:32,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:15:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:15:38,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:15:38,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 191 [2018-09-26 21:15:38,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-09-26 21:15:38,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-09-26 21:15:38,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9453, Invalid=27219, Unknown=0, NotChecked=0, Total=36672 [2018-09-26 21:15:38,358 INFO L87 Difference]: Start difference. First operand 239 states and 286 transitions. Second operand 192 states. [2018-09-26 21:15:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:15:39,540 INFO L93 Difference]: Finished difference Result 250 states and 299 transitions. [2018-09-26 21:15:39,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-26 21:15:39,541 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 238 [2018-09-26 21:15:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:15:39,542 INFO L225 Difference]: With dead ends: 250 [2018-09-26 21:15:39,542 INFO L226 Difference]: Without dead ends: 248 [2018-09-26 21:15:39,543 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 [2018-09-26 21:15:39,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-09-26 21:15:39,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2018-09-26 21:15:39,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-09-26 21:15:39,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 292 transitions. [2018-09-26 21:15:39,549 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 292 transitions. Word has length 238 [2018-09-26 21:15:39,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:15:39,549 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 292 transitions. [2018-09-26 21:15:39,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-09-26 21:15:39,549 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 292 transitions. [2018-09-26 21:15:39,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-26 21:15:39,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:15:39,550 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1] [2018-09-26 21:15:39,550 INFO L423 AbstractCegarLoop]: === Iteration 50 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:15:39,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:15:39,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1225829088, now seen corresponding path program 48 times [2018-09-26 21:15:39,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:15:39,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:15:39,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:39,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:15:39,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:15:43,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:15:43,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:15:43,081 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:15:43,168 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-26 21:15:43,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:15:43,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:15:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:15:49,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:15:49,174 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 195 [2018-09-26 21:15:49,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 196 states [2018-09-26 21:15:49,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2018-09-26 21:15:49,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9846, Invalid=28374, Unknown=0, NotChecked=0, Total=38220 [2018-09-26 21:15:49,176 INFO L87 Difference]: Start difference. First operand 244 states and 292 transitions. Second operand 196 states. [2018-09-26 21:15:50,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:15:50,348 INFO L93 Difference]: Finished difference Result 255 states and 305 transitions. [2018-09-26 21:15:50,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-26 21:15:50,349 INFO L78 Accepts]: Start accepts. Automaton has 196 states. Word has length 243 [2018-09-26 21:15:50,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:15:50,350 INFO L225 Difference]: With dead ends: 255 [2018-09-26 21:15:50,350 INFO L226 Difference]: Without dead ends: 253 [2018-09-26 21:15:50,351 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 [2018-09-26 21:15:50,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-09-26 21:15:50,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2018-09-26 21:15:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-09-26 21:15:50,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 298 transitions. [2018-09-26 21:15:50,356 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 298 transitions. Word has length 243 [2018-09-26 21:15:50,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:15:50,357 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 298 transitions. [2018-09-26 21:15:50,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 196 states. [2018-09-26 21:15:50,357 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 298 transitions. [2018-09-26 21:15:50,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-26 21:15:50,358 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:15:50,358 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1] [2018-09-26 21:15:50,358 INFO L423 AbstractCegarLoop]: === Iteration 51 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:15:50,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:15:50,359 INFO L82 PathProgramCache]: Analyzing trace with hash 291644140, now seen corresponding path program 49 times [2018-09-26 21:15:50,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:15:50,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:15:50,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:50,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:15:50,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:15:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:15:54,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:15:54,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:15:54,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:15:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:15:54,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-26 21:15:58,088 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-26 21:15:58,289 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:15:58,289 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:15:58,295 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:15:58,295 INFO L202 PluginConnector]: Adding new model GateController.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:15:58 BoogieIcfgContainer [2018-09-26 21:15:58,295 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:15:58,296 INFO L168 Benchmark]: Toolchain (without parser) took 237574.96 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -32.0 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 299.3 MB). Peak memory consumption was 267.4 MB. Max. memory is 7.1 GB. [2018-09-26 21:15:58,298 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:15:58,298 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.44 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:15:58,298 INFO L168 Benchmark]: Boogie Preprocessor took 25.83 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:15:58,299 INFO L168 Benchmark]: RCFGBuilder took 411.72 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. [2018-09-26 21:15:58,299 INFO L168 Benchmark]: TraceAbstraction took 237082.76 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -32.0 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 278.2 MB). Peak memory consumption was 246.2 MB. Max. memory is 7.1 GB. [2018-09-26 21:15:58,302 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 0.21 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 48.44 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 25.83 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 411.72 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 237082.76 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -32.0 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 278.2 MB). Peak memory consumption was 246.2 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 249 with TraceHistMax 49, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 175 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 236.9s OverallTime, 51 OverallIterations, 49 TraceHistogramMax, 26.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 505 SDtfs, 16680 SDslu, 14594 SDs, 0 SdLazy, 14845 SolverSat, 3065 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8428 GetRequests, 3626 SyntacticMatches, 0 SemanticMatches, 4802 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360592 ImplicationChecksByTransitivity, 187.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=249occurred in iteration=50, 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, 50 MinimizatonAttempts, 197 StatesRemovedByMinimization, 49 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 196.2s InterpolantComputationTime, 12059 NumberOfCodeBlocks, 12059 NumberOfCodeBlocksAsserted, 730 NumberOfCheckSat, 11961 ConstructedInterpolants, 5928 QuantifiedInterpolants, 19180285 SizeOfPredicates, 1320 NumberOfNonLiveVariables, 10176 ConjunctsInSsa, 2544 ConjunctsInUnsatCore, 98 InterpolantComputations, 2 PerfectInterpolantSequences, 1/186593 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-0-2018-09-26_21-15-58-317.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/GateController.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-15-58-317.csv Completed graceful shutdown