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/RailwayCrossing.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:30:51,447 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:30:51,450 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:30:51,466 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-09-23 19:30:51,512 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:30:51,538 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:30:51,538 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:30:51,539 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:30:51,539 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:30:51,543 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:30:51,544 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:30:51,544 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:30:51,544 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:30:51,544 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:30:51,544 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:30:51,545 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:30:51,545 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:30:51,545 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:30:51,545 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:30:51,545 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:30:51,545 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:30:51,546 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:30:51,546 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:30:51,546 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:30:51,546 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:30:51,547 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:30:51,547 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:30:51,548 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:30:51,548 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:30:51,548 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:30:51,548 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:30:51,548 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:30:51,549 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:30:51,549 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:30:51,549 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:30:51,613 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:30:51,626 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:30:51,630 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:30:51,632 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:30:51,633 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:30:51,634 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/RailwayCrossing.bpl [2018-09-23 19:30:51,634 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/RailwayCrossing.bpl' [2018-09-23 19:30:51,692 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:30:51,695 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:30:51,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:30:51,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:30:51,696 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:30:51,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/1) ... [2018-09-23 19:30:51,732 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/1) ... [2018-09-23 19:30:51,737 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 19:30:51,738 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 19:30:51,738 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 19:30:51,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:30:51,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:30:51,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:30:51,741 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:30:51,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/1) ... [2018-09-23 19:30:51,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/1) ... [2018-09-23 19:30:51,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/1) ... [2018-09-23 19:30:51,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/1) ... [2018-09-23 19:30:51,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/1) ... [2018-09-23 19:30:51,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/1) ... [2018-09-23 19:30:51,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/1) ... [2018-09-23 19:30:51,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:30:51,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:30:51,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:30:51,768 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:30:51,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:30:51,837 INFO L124 BoogieDeclarations]: Specification and implementation of procedure GateController given in one single declaration [2018-09-23 19:30:51,838 INFO L130 BoogieDeclarations]: Found specification of procedure GateController [2018-09-23 19:30:51,838 INFO L138 BoogieDeclarations]: Found implementation of procedure GateController [2018-09-23 19:30:52,170 INFO L351 CfgBuilder]: Using library mode [2018-09-23 19:30:52,171 INFO L202 PluginConnector]: Adding new model RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:30:52 BoogieIcfgContainer [2018-09-23 19:30:52,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:30:52,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:30:52,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:30:52,178 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:30:52,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:30:51" (1/2) ... [2018-09-23 19:30:52,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379dd387 and model type RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:30:52, skipping insertion in model container [2018-09-23 19:30:52,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:30:52" (2/2) ... [2018-09-23 19:30:52,182 INFO L112 eAbstractionObserver]: Analyzing ICFG RailwayCrossing.bpl [2018-09-23 19:30:52,193 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:30:52,206 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:30:52,257 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:30:52,258 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:30:52,258 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:30:52,259 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:30:52,259 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:30:52,259 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:30:52,259 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:30:52,259 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:30:52,260 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:30:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-09-23 19:30:52,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 19:30:52,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:52,284 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 19:30:52,285 INFO L423 AbstractCegarLoop]: === Iteration 1 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:52,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:52,292 INFO L82 PathProgramCache]: Analyzing trace with hash 30496, now seen corresponding path program 1 times [2018-09-23 19:30:52,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:52,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:52,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:52,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:30:52,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:52,461 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:30:52,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 19:30:52,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:30:52,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:30:52,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:30:52,488 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-09-23 19:30:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:30:52,596 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-23 19:30:52,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:30:52,599 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-23 19:30:52,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:30:52,625 INFO L225 Difference]: With dead ends: 19 [2018-09-23 19:30:52,626 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 19:30:52,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:30:52,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 19:30:52,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-09-23 19:30:52,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 19:30:52,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2018-09-23 19:30:52,674 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 3 [2018-09-23 19:30:52,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:30:52,675 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2018-09-23 19:30:52,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:30:52,675 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2018-09-23 19:30:52,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:30:52,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:52,675 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:30:52,676 INFO L423 AbstractCegarLoop]: === Iteration 2 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:52,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:52,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1863215691, now seen corresponding path program 1 times [2018-09-23 19:30:52,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:52,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:52,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:52,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:30:52,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:52,709 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:30:52,709 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 19:30:52,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:30:52,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:30:52,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:30:52,712 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand 3 states. [2018-09-23 19:30:52,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:30:52,737 INFO L93 Difference]: Finished difference Result 16 states and 22 transitions. [2018-09-23 19:30:52,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:30:52,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-09-23 19:30:52,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:30:52,739 INFO L225 Difference]: With dead ends: 16 [2018-09-23 19:30:52,739 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 19:30:52,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:30:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 19:30:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 19:30:52,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 19:30:52,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2018-09-23 19:30:52,743 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2018-09-23 19:30:52,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:30:52,743 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2018-09-23 19:30:52,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:30:52,744 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2018-09-23 19:30:52,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:30:52,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:52,745 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:30:52,745 INFO L423 AbstractCegarLoop]: === Iteration 3 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:52,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:52,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1926837521, now seen corresponding path program 1 times [2018-09-23 19:30:52,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:52,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:52,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:52,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:30:52,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:52,823 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:30:52,823 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:30:52,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:30:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:52,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:30:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:53,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:30:53,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2018-09-23 19:30:53,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:30:53,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:30:53,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:30:53,178 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 6 states. [2018-09-23 19:30:53,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:30:53,245 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2018-09-23 19:30:53,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:30:53,246 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2018-09-23 19:30:53,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:30:53,247 INFO L225 Difference]: With dead ends: 20 [2018-09-23 19:30:53,247 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 19:30:53,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:30:53,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 19:30:53,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2018-09-23 19:30:53,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:30:53,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2018-09-23 19:30:53,252 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2018-09-23 19:30:53,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:30:53,253 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2018-09-23 19:30:53,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:30:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2018-09-23 19:30:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:30:53,254 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:53,254 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2018-09-23 19:30:53,254 INFO L423 AbstractCegarLoop]: === Iteration 4 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:53,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:53,255 INFO L82 PathProgramCache]: Analyzing trace with hash 640583104, now seen corresponding path program 2 times [2018-09-23 19:30:53,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:53,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:53,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:53,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:30:53,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:53,376 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:30:53,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:30:53,387 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:30:53,408 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:30:53,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:30:53,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:30:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:53,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:30:53,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-09-23 19:30:53,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:30:53,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:30:53,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:30:53,765 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 8 states. [2018-09-23 19:30:53,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:30:53,828 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2018-09-23 19:30:53,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:30:53,830 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:30:53,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:30:53,831 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:30:53,832 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:30:53,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:30:53,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:30:53,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-09-23 19:30:53,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:30:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-09-23 19:30:53,844 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 13 [2018-09-23 19:30:53,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:30:53,845 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-09-23 19:30:53,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:30:53,845 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2018-09-23 19:30:53,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:30:53,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:53,846 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1] [2018-09-23 19:30:53,847 INFO L423 AbstractCegarLoop]: === Iteration 5 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:53,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:53,847 INFO L82 PathProgramCache]: Analyzing trace with hash -297055631, now seen corresponding path program 3 times [2018-09-23 19:30:53,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:53,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:53,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:53,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:30:53,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:53,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:30:53,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:30:53,984 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:30:54,038 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 19:30:54,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:30:54,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:30:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:54,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:30:54,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-09-23 19:30:54,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:30:54,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:30:54,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:30:54,469 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 10 states. [2018-09-23 19:30:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:30:54,666 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2018-09-23 19:30:54,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:30:54,667 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-23 19:30:54,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:30:54,667 INFO L225 Difference]: With dead ends: 30 [2018-09-23 19:30:54,668 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 19:30:54,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:30:54,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 19:30:54,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2018-09-23 19:30:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:30:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2018-09-23 19:30:54,674 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 18 [2018-09-23 19:30:54,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:30:54,674 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2018-09-23 19:30:54,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:30:54,674 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2018-09-23 19:30:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 19:30:54,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:54,675 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1] [2018-09-23 19:30:54,676 INFO L423 AbstractCegarLoop]: === Iteration 6 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:54,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:54,676 INFO L82 PathProgramCache]: Analyzing trace with hash 2073218144, now seen corresponding path program 4 times [2018-09-23 19:30:54,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:54,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:54,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:54,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:30:54,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:54,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:30:54,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:30:54,826 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:30:54,862 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:30:54,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:30:54,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:30:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:55,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:30:55,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-23 19:30:55,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:30:55,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:30:55,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:30:55,101 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 12 states. [2018-09-23 19:30:55,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:30:55,175 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2018-09-23 19:30:55,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:30:55,176 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-09-23 19:30:55,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:30:55,178 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:30:55,178 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:30:55,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:30:55,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:30:55,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2018-09-23 19:30:55,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 19:30:55,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2018-09-23 19:30:55,194 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 23 [2018-09-23 19:30:55,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:30:55,195 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2018-09-23 19:30:55,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:30:55,195 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2018-09-23 19:30:55,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 19:30:55,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:55,197 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1] [2018-09-23 19:30:55,197 INFO L423 AbstractCegarLoop]: === Iteration 7 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:55,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:55,202 INFO L82 PathProgramCache]: Analyzing trace with hash -609605679, now seen corresponding path program 5 times [2018-09-23 19:30:55,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:55,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:55,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:55,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:30:55,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:55,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:30:55,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:30:55,640 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:30:55,675 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 19:30:55,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:30:55,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:30:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:56,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:30:56,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-23 19:30:56,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:30:56,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:30:56,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:30:56,179 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand 14 states. [2018-09-23 19:30:56,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:30:56,381 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2018-09-23 19:30:56,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:30:56,382 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2018-09-23 19:30:56,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:30:56,383 INFO L225 Difference]: With dead ends: 40 [2018-09-23 19:30:56,383 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 19:30:56,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:30:56,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 19:30:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2018-09-23 19:30:56,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:30:56,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2018-09-23 19:30:56,390 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 28 [2018-09-23 19:30:56,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:30:56,390 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2018-09-23 19:30:56,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:30:56,391 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2018-09-23 19:30:56,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:30:56,391 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:56,392 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1] [2018-09-23 19:30:56,392 INFO L423 AbstractCegarLoop]: === Iteration 8 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:56,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:56,392 INFO L82 PathProgramCache]: Analyzing trace with hash -70825216, now seen corresponding path program 6 times [2018-09-23 19:30:56,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:56,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:56,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:56,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:30:56,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:56,621 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:30:56,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:30:56,630 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:30:56,735 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:30:56,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:30:56,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:30:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:57,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:30:57,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-09-23 19:30:57,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:30:57,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:30:57,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:30:57,084 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand 16 states. [2018-09-23 19:30:57,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:30:57,166 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2018-09-23 19:30:57,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:30:57,167 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2018-09-23 19:30:57,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:30:57,168 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:30:57,168 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:30:57,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:30:57,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:30:57,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-09-23 19:30:57,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 19:30:57,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2018-09-23 19:30:57,176 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 33 [2018-09-23 19:30:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:30:57,177 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2018-09-23 19:30:57,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:30:57,177 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2018-09-23 19:30:57,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:30:57,178 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:57,178 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1] [2018-09-23 19:30:57,179 INFO L423 AbstractCegarLoop]: === Iteration 9 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:57,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:57,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1872481585, now seen corresponding path program 7 times [2018-09-23 19:30:57,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:57,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:57,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:57,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:30:57,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:57,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:30:57,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:30:57,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:30:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:57,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:30:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:57,709 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:30:57,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-09-23 19:30:57,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:30:57,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:30:57,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:30:57,711 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 18 states. [2018-09-23 19:30:57,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:30:57,809 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2018-09-23 19:30:57,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:30:57,810 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2018-09-23 19:30:57,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:30:57,811 INFO L225 Difference]: With dead ends: 50 [2018-09-23 19:30:57,811 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 19:30:57,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:30:57,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 19:30:57,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2018-09-23 19:30:57,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 19:30:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-09-23 19:30:57,818 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 38 [2018-09-23 19:30:57,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:30:57,819 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-09-23 19:30:57,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:30:57,819 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-09-23 19:30:57,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 19:30:57,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:57,820 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1] [2018-09-23 19:30:57,821 INFO L423 AbstractCegarLoop]: === Iteration 10 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:57,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:57,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1776681376, now seen corresponding path program 8 times [2018-09-23 19:30:57,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:57,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:57,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:57,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:30:57,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:58,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:30:58,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:30:58,032 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:30:58,062 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:30:58,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:30:58,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:30:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:58,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:30:58,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-23 19:30:58,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:30:58,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:30:58,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:30:58,480 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 20 states. [2018-09-23 19:30:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:30:58,604 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2018-09-23 19:30:58,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:30:58,604 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2018-09-23 19:30:58,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:30:58,606 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:30:58,606 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:30:58,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:30:58,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:30:58,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2018-09-23 19:30:58,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 19:30:58,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2018-09-23 19:30:58,614 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 43 [2018-09-23 19:30:58,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:30:58,615 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2018-09-23 19:30:58,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:30:58,615 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2018-09-23 19:30:58,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 19:30:58,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:30:58,617 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1] [2018-09-23 19:30:58,617 INFO L423 AbstractCegarLoop]: === Iteration 11 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:30:58,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:30:58,617 INFO L82 PathProgramCache]: Analyzing trace with hash -951698799, now seen corresponding path program 9 times [2018-09-23 19:30:58,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:30:58,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:30:58,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:58,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:30:58,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:30:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:30:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:30:58,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:30:58,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:30:58,889 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:30:58,924 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-23 19:30:58,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:30:58,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:00,398 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:00,398 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-09-23 19:31:00,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:31:00,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:31:00,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:31:00,399 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand 22 states. [2018-09-23 19:31:00,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:00,522 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2018-09-23 19:31:00,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:31:00,522 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2018-09-23 19:31:00,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:00,523 INFO L225 Difference]: With dead ends: 60 [2018-09-23 19:31:00,524 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 19:31:00,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:31:00,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 19:31:00,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2018-09-23 19:31:00,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 19:31:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2018-09-23 19:31:00,531 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 48 [2018-09-23 19:31:00,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:00,531 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2018-09-23 19:31:00,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:31:00,532 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2018-09-23 19:31:00,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 19:31:00,534 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:00,534 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1] [2018-09-23 19:31:00,534 INFO L423 AbstractCegarLoop]: === Iteration 12 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:00,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:00,534 INFO L82 PathProgramCache]: Analyzing trace with hash -259461056, now seen corresponding path program 10 times [2018-09-23 19:31:00,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:00,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:00,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:00,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:00,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:00,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:00,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:00,710 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:31:00,726 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:31:00,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:00,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:01,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:01,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-09-23 19:31:01,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:31:01,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:31:01,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:31:01,186 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 24 states. [2018-09-23 19:31:01,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:01,442 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2018-09-23 19:31:01,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:31:01,442 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2018-09-23 19:31:01,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:01,444 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:31:01,444 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 19:31:01,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:31:01,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 19:31:01,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-09-23 19:31:01,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 19:31:01,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2018-09-23 19:31:01,452 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 53 [2018-09-23 19:31:01,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:01,452 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2018-09-23 19:31:01,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:31:01,452 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2018-09-23 19:31:01,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 19:31:01,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:01,453 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1] [2018-09-23 19:31:01,454 INFO L423 AbstractCegarLoop]: === Iteration 13 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:01,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:01,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1213165553, now seen corresponding path program 11 times [2018-09-23 19:31:01,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:01,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:01,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:01,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:01,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:01,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:01,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:01,654 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:31:01,678 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-23 19:31:01,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:01,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:02,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:02,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-09-23 19:31:02,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:31:02,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:31:02,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:31:02,134 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand 26 states. [2018-09-23 19:31:02,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:02,264 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2018-09-23 19:31:02,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:31:02,265 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2018-09-23 19:31:02,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:02,266 INFO L225 Difference]: With dead ends: 70 [2018-09-23 19:31:02,266 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 19:31:02,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:31:02,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 19:31:02,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2018-09-23 19:31:02,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 19:31:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2018-09-23 19:31:02,274 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 58 [2018-09-23 19:31:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:02,274 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2018-09-23 19:31:02,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:31:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2018-09-23 19:31:02,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 19:31:02,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:02,276 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1] [2018-09-23 19:31:02,276 INFO L423 AbstractCegarLoop]: === Iteration 14 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:02,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:02,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1043720480, now seen corresponding path program 12 times [2018-09-23 19:31:02,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:02,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:02,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:02,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:02,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:02,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:02,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:02,489 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:31:02,561 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 19:31:02,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:02,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:03,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:03,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2018-09-23 19:31:03,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:31:03,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:31:03,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:31:03,257 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 28 states. [2018-09-23 19:31:03,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:03,407 INFO L93 Difference]: Finished difference Result 75 states and 103 transitions. [2018-09-23 19:31:03,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:31:03,408 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2018-09-23 19:31:03,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:03,408 INFO L225 Difference]: With dead ends: 75 [2018-09-23 19:31:03,409 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 19:31:03,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:31:03,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 19:31:03,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2018-09-23 19:31:03,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 19:31:03,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 95 transitions. [2018-09-23 19:31:03,416 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 95 transitions. Word has length 63 [2018-09-23 19:31:03,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:03,417 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 95 transitions. [2018-09-23 19:31:03,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:31:03,417 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 95 transitions. [2018-09-23 19:31:03,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 19:31:03,418 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:03,418 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1] [2018-09-23 19:31:03,419 INFO L423 AbstractCegarLoop]: === Iteration 15 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:03,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:03,419 INFO L82 PathProgramCache]: Analyzing trace with hash 14511441, now seen corresponding path program 13 times [2018-09-23 19:31:03,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:03,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:03,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:03,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:03,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:03,900 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:03,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:03,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:03,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:04,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:04,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-09-23 19:31:04,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:31:04,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:31:04,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:31:04,419 INFO L87 Difference]: Start difference. First operand 69 states and 95 transitions. Second operand 30 states. [2018-09-23 19:31:04,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:04,532 INFO L93 Difference]: Finished difference Result 80 states and 110 transitions. [2018-09-23 19:31:04,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:31:04,533 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2018-09-23 19:31:04,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:04,534 INFO L225 Difference]: With dead ends: 80 [2018-09-23 19:31:04,534 INFO L226 Difference]: Without dead ends: 78 [2018-09-23 19:31:04,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:31:04,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-23 19:31:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2018-09-23 19:31:04,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 19:31:04,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 102 transitions. [2018-09-23 19:31:04,544 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 102 transitions. Word has length 68 [2018-09-23 19:31:04,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:04,544 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 102 transitions. [2018-09-23 19:31:04,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:31:04,544 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 102 transitions. [2018-09-23 19:31:04,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 19:31:04,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:04,547 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1] [2018-09-23 19:31:04,547 INFO L423 AbstractCegarLoop]: === Iteration 16 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:04,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:04,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1220315776, now seen corresponding path program 14 times [2018-09-23 19:31:04,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:04,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:04,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:04,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:04,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:05,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:05,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:05,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:31:05,179 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:31:05,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:05,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:05,718 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:05,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-09-23 19:31:05,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:31:05,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:31:05,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:31:05,720 INFO L87 Difference]: Start difference. First operand 74 states and 102 transitions. Second operand 32 states. [2018-09-23 19:31:05,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:05,856 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2018-09-23 19:31:05,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:31:05,856 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2018-09-23 19:31:05,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:05,857 INFO L225 Difference]: With dead ends: 85 [2018-09-23 19:31:05,857 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 19:31:05,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:31:05,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 19:31:05,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-09-23 19:31:05,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 19:31:05,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2018-09-23 19:31:05,865 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 73 [2018-09-23 19:31:05,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:05,865 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2018-09-23 19:31:05,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:31:05,865 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2018-09-23 19:31:05,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 19:31:05,867 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:05,867 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1] [2018-09-23 19:31:05,867 INFO L423 AbstractCegarLoop]: === Iteration 17 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:05,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:05,867 INFO L82 PathProgramCache]: Analyzing trace with hash 127283889, now seen corresponding path program 15 times [2018-09-23 19:31:05,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:05,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:05,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:05,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:05,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:07,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:07,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:07,186 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:31:07,221 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-23 19:31:07,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:07,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:07,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:07,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-09-23 19:31:07,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:31:07,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:31:07,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:31:07,684 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand 34 states. [2018-09-23 19:31:07,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:07,839 INFO L93 Difference]: Finished difference Result 90 states and 124 transitions. [2018-09-23 19:31:07,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:31:07,840 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2018-09-23 19:31:07,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:07,841 INFO L225 Difference]: With dead ends: 90 [2018-09-23 19:31:07,841 INFO L226 Difference]: Without dead ends: 88 [2018-09-23 19:31:07,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:31:07,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-23 19:31:07,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2018-09-23 19:31:07,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-23 19:31:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 116 transitions. [2018-09-23 19:31:07,848 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 116 transitions. Word has length 78 [2018-09-23 19:31:07,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:07,849 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 116 transitions. [2018-09-23 19:31:07,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:31:07,849 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 116 transitions. [2018-09-23 19:31:07,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 19:31:07,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:07,850 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1] [2018-09-23 19:31:07,850 INFO L423 AbstractCegarLoop]: === Iteration 18 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:07,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:07,851 INFO L82 PathProgramCache]: Analyzing trace with hash -233894880, now seen corresponding path program 16 times [2018-09-23 19:31:07,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:07,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:07,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:07,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:07,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:08,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:08,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:08,128 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:31:08,154 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:31:08,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:08,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:08,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:08,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2018-09-23 19:31:08,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:31:08,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:31:08,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:31:08,595 INFO L87 Difference]: Start difference. First operand 84 states and 116 transitions. Second operand 36 states. [2018-09-23 19:31:08,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:08,787 INFO L93 Difference]: Finished difference Result 95 states and 131 transitions. [2018-09-23 19:31:08,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:31:08,788 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 83 [2018-09-23 19:31:08,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:08,789 INFO L225 Difference]: With dead ends: 95 [2018-09-23 19:31:08,789 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 19:31:08,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:31:08,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 19:31:08,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-09-23 19:31:08,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 19:31:08,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 123 transitions. [2018-09-23 19:31:08,796 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 123 transitions. Word has length 83 [2018-09-23 19:31:08,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:08,796 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 123 transitions. [2018-09-23 19:31:08,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:31:08,797 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 123 transitions. [2018-09-23 19:31:08,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 19:31:08,798 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:08,798 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1] [2018-09-23 19:31:08,798 INFO L423 AbstractCegarLoop]: === Iteration 19 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:08,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:08,798 INFO L82 PathProgramCache]: Analyzing trace with hash -610287599, now seen corresponding path program 17 times [2018-09-23 19:31:08,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:08,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:08,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:08,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:08,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:09,070 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:09,070 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:09,080 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:31:09,115 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-23 19:31:09,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:09,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:10,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:10,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-09-23 19:31:10,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:31:10,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:31:10,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:31:10,264 INFO L87 Difference]: Start difference. First operand 89 states and 123 transitions. Second operand 38 states. [2018-09-23 19:31:10,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:10,378 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2018-09-23 19:31:10,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:31:10,379 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 88 [2018-09-23 19:31:10,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:10,380 INFO L225 Difference]: With dead ends: 100 [2018-09-23 19:31:10,380 INFO L226 Difference]: Without dead ends: 98 [2018-09-23 19:31:10,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:31:10,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-23 19:31:10,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2018-09-23 19:31:10,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 19:31:10,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 130 transitions. [2018-09-23 19:31:10,384 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 130 transitions. Word has length 88 [2018-09-23 19:31:10,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:10,384 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 130 transitions. [2018-09-23 19:31:10,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:31:10,385 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 130 transitions. [2018-09-23 19:31:10,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-23 19:31:10,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:10,386 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1] [2018-09-23 19:31:10,386 INFO L423 AbstractCegarLoop]: === Iteration 20 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:10,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:10,391 INFO L82 PathProgramCache]: Analyzing trace with hash 2059852480, now seen corresponding path program 18 times [2018-09-23 19:31:10,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:10,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:10,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:10,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:10,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:10,774 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:10,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:10,781 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:31:10,821 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 19:31:10,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:10,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:11,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:11,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2018-09-23 19:31:11,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:31:11,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:31:11,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:31:11,584 INFO L87 Difference]: Start difference. First operand 94 states and 130 transitions. Second operand 40 states. [2018-09-23 19:31:11,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:11,722 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2018-09-23 19:31:11,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:31:11,722 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 93 [2018-09-23 19:31:11,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:11,723 INFO L225 Difference]: With dead ends: 105 [2018-09-23 19:31:11,723 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 19:31:11,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:31:11,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 19:31:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-09-23 19:31:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 19:31:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 137 transitions. [2018-09-23 19:31:11,730 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 137 transitions. Word has length 93 [2018-09-23 19:31:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:11,730 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 137 transitions. [2018-09-23 19:31:11,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:31:11,730 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 137 transitions. [2018-09-23 19:31:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 19:31:11,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:11,731 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1] [2018-09-23 19:31:11,731 INFO L423 AbstractCegarLoop]: === Iteration 21 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:11,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:11,732 INFO L82 PathProgramCache]: Analyzing trace with hash -996141711, now seen corresponding path program 19 times [2018-09-23 19:31:11,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:11,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:11,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:11,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:11,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:12,038 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:12,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:12,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:12,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:12,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:13,021 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:13,021 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2018-09-23 19:31:13,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:31:13,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:31:13,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:31:13,023 INFO L87 Difference]: Start difference. First operand 99 states and 137 transitions. Second operand 42 states. [2018-09-23 19:31:13,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:13,153 INFO L93 Difference]: Finished difference Result 110 states and 152 transitions. [2018-09-23 19:31:13,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:31:13,153 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 98 [2018-09-23 19:31:13,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:13,154 INFO L225 Difference]: With dead ends: 110 [2018-09-23 19:31:13,154 INFO L226 Difference]: Without dead ends: 108 [2018-09-23 19:31:13,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:31:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-23 19:31:13,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2018-09-23 19:31:13,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 19:31:13,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 144 transitions. [2018-09-23 19:31:13,159 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 144 transitions. Word has length 98 [2018-09-23 19:31:13,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:13,160 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 144 transitions. [2018-09-23 19:31:13,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:31:13,160 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 144 transitions. [2018-09-23 19:31:13,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-23 19:31:13,161 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:13,161 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1] [2018-09-23 19:31:13,161 INFO L423 AbstractCegarLoop]: === Iteration 22 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:13,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:13,162 INFO L82 PathProgramCache]: Analyzing trace with hash -511385248, now seen corresponding path program 20 times [2018-09-23 19:31:13,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:13,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:13,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:13,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:13,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:13,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:13,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:13,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:31:13,714 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:31:13,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:13,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:16,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:16,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2018-09-23 19:31:16,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:31:16,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:31:16,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:31:16,024 INFO L87 Difference]: Start difference. First operand 104 states and 144 transitions. Second operand 44 states. [2018-09-23 19:31:16,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:16,272 INFO L93 Difference]: Finished difference Result 115 states and 159 transitions. [2018-09-23 19:31:16,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:31:16,274 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 103 [2018-09-23 19:31:16,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:16,275 INFO L225 Difference]: With dead ends: 115 [2018-09-23 19:31:16,275 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 19:31:16,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:31:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 19:31:16,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2018-09-23 19:31:16,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 19:31:16,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 151 transitions. [2018-09-23 19:31:16,279 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 151 transitions. Word has length 103 [2018-09-23 19:31:16,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:16,280 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 151 transitions. [2018-09-23 19:31:16,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:31:16,280 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 151 transitions. [2018-09-23 19:31:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 19:31:16,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:16,280 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1] [2018-09-23 19:31:16,280 INFO L423 AbstractCegarLoop]: === Iteration 23 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:16,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:16,281 INFO L82 PathProgramCache]: Analyzing trace with hash 851260113, now seen corresponding path program 21 times [2018-09-23 19:31:16,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:16,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:16,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:16,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:16,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:16,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:16,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:16,984 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:31:17,071 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-23 19:31:17,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:17,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:17,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:17,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2018-09-23 19:31:17,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:31:17,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:31:17,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:31:17,604 INFO L87 Difference]: Start difference. First operand 109 states and 151 transitions. Second operand 46 states. [2018-09-23 19:31:17,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:17,855 INFO L93 Difference]: Finished difference Result 120 states and 166 transitions. [2018-09-23 19:31:17,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:31:17,856 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 108 [2018-09-23 19:31:17,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:17,856 INFO L225 Difference]: With dead ends: 120 [2018-09-23 19:31:17,857 INFO L226 Difference]: Without dead ends: 118 [2018-09-23 19:31:17,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:31:17,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-23 19:31:17,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2018-09-23 19:31:17,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-23 19:31:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 158 transitions. [2018-09-23 19:31:17,863 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 158 transitions. Word has length 108 [2018-09-23 19:31:17,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:17,864 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 158 transitions. [2018-09-23 19:31:17,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:31:17,864 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 158 transitions. [2018-09-23 19:31:17,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-23 19:31:17,865 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:17,865 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1] [2018-09-23 19:31:17,865 INFO L423 AbstractCegarLoop]: === Iteration 24 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:17,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:17,866 INFO L82 PathProgramCache]: Analyzing trace with hash -572317696, now seen corresponding path program 22 times [2018-09-23 19:31:17,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:17,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:17,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:17,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:17,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:18,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:18,345 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:18,365 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:31:18,392 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:31:18,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:18,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:18,943 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:18,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2018-09-23 19:31:18,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:31:18,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:31:18,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:31:18,945 INFO L87 Difference]: Start difference. First operand 114 states and 158 transitions. Second operand 48 states. [2018-09-23 19:31:19,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:19,117 INFO L93 Difference]: Finished difference Result 125 states and 173 transitions. [2018-09-23 19:31:19,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:31:19,117 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 113 [2018-09-23 19:31:19,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:19,119 INFO L225 Difference]: With dead ends: 125 [2018-09-23 19:31:19,119 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 19:31:19,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:31:19,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 19:31:19,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-09-23 19:31:19,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 19:31:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 165 transitions. [2018-09-23 19:31:19,126 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 165 transitions. Word has length 113 [2018-09-23 19:31:19,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:19,126 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 165 transitions. [2018-09-23 19:31:19,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:31:19,127 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 165 transitions. [2018-09-23 19:31:19,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-23 19:31:19,127 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:19,127 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1] [2018-09-23 19:31:19,128 INFO L423 AbstractCegarLoop]: === Iteration 25 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:19,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:19,128 INFO L82 PathProgramCache]: Analyzing trace with hash 513611825, now seen corresponding path program 23 times [2018-09-23 19:31:19,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:19,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:19,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:19,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:19,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:19,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:19,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:19,821 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:31:19,868 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-23 19:31:19,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:19,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:20,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:20,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2018-09-23 19:31:20,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:31:20,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:31:20,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:31:20,711 INFO L87 Difference]: Start difference. First operand 119 states and 165 transitions. Second operand 50 states. [2018-09-23 19:31:20,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:20,868 INFO L93 Difference]: Finished difference Result 130 states and 180 transitions. [2018-09-23 19:31:20,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:31:20,869 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 118 [2018-09-23 19:31:20,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:20,870 INFO L225 Difference]: With dead ends: 130 [2018-09-23 19:31:20,870 INFO L226 Difference]: Without dead ends: 128 [2018-09-23 19:31:20,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:31:20,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-23 19:31:20,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2018-09-23 19:31:20,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-23 19:31:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 172 transitions. [2018-09-23 19:31:20,876 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 172 transitions. Word has length 118 [2018-09-23 19:31:20,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:20,876 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 172 transitions. [2018-09-23 19:31:20,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:31:20,876 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 172 transitions. [2018-09-23 19:31:20,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-23 19:31:20,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:20,877 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1] [2018-09-23 19:31:20,878 INFO L423 AbstractCegarLoop]: === Iteration 26 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:20,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:20,878 INFO L82 PathProgramCache]: Analyzing trace with hash -285501792, now seen corresponding path program 24 times [2018-09-23 19:31:20,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:20,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:20,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:20,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:20,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:21,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:21,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:21,325 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:31:21,376 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 19:31:21,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:21,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:22,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:22,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2018-09-23 19:31:22,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:31:22,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:31:22,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:31:22,099 INFO L87 Difference]: Start difference. First operand 124 states and 172 transitions. Second operand 52 states. [2018-09-23 19:31:22,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:22,248 INFO L93 Difference]: Finished difference Result 135 states and 187 transitions. [2018-09-23 19:31:22,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:31:22,248 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 123 [2018-09-23 19:31:22,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:22,249 INFO L225 Difference]: With dead ends: 135 [2018-09-23 19:31:22,249 INFO L226 Difference]: Without dead ends: 133 [2018-09-23 19:31:22,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:31:22,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-23 19:31:22,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2018-09-23 19:31:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-23 19:31:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 179 transitions. [2018-09-23 19:31:22,256 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 179 transitions. Word has length 123 [2018-09-23 19:31:22,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:22,256 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 179 transitions. [2018-09-23 19:31:22,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:31:22,256 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 179 transitions. [2018-09-23 19:31:22,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-23 19:31:22,257 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:22,257 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1] [2018-09-23 19:31:22,257 INFO L423 AbstractCegarLoop]: === Iteration 27 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:22,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:22,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1768277393, now seen corresponding path program 25 times [2018-09-23 19:31:22,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:22,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:22,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:22,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:22,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:22,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:22,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:22,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:22,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:23,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:23,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2018-09-23 19:31:23,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:31:23,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:31:23,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:31:23,535 INFO L87 Difference]: Start difference. First operand 129 states and 179 transitions. Second operand 54 states. [2018-09-23 19:31:23,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:23,745 INFO L93 Difference]: Finished difference Result 140 states and 194 transitions. [2018-09-23 19:31:23,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:31:23,746 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 128 [2018-09-23 19:31:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:23,747 INFO L225 Difference]: With dead ends: 140 [2018-09-23 19:31:23,747 INFO L226 Difference]: Without dead ends: 138 [2018-09-23 19:31:23,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:31:23,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-23 19:31:23,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2018-09-23 19:31:23,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-23 19:31:23,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 186 transitions. [2018-09-23 19:31:23,753 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 186 transitions. Word has length 128 [2018-09-23 19:31:23,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:23,753 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 186 transitions. [2018-09-23 19:31:23,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:31:23,753 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 186 transitions. [2018-09-23 19:31:23,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-23 19:31:23,754 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:23,754 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1] [2018-09-23 19:31:23,754 INFO L423 AbstractCegarLoop]: === Iteration 28 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:23,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:23,755 INFO L82 PathProgramCache]: Analyzing trace with hash -77052608, now seen corresponding path program 26 times [2018-09-23 19:31:23,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:23,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:23,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:23,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:23,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:24,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:24,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:24,689 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:31:24,721 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:31:24,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:24,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:25,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:25,805 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 55 [2018-09-23 19:31:25,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:31:25,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:31:25,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:31:25,806 INFO L87 Difference]: Start difference. First operand 134 states and 186 transitions. Second operand 56 states. [2018-09-23 19:31:26,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:26,044 INFO L93 Difference]: Finished difference Result 145 states and 201 transitions. [2018-09-23 19:31:26,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:31:26,044 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 133 [2018-09-23 19:31:26,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:26,045 INFO L225 Difference]: With dead ends: 145 [2018-09-23 19:31:26,045 INFO L226 Difference]: Without dead ends: 143 [2018-09-23 19:31:26,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:31:26,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-23 19:31:26,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-09-23 19:31:26,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-23 19:31:26,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 193 transitions. [2018-09-23 19:31:26,052 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 193 transitions. Word has length 133 [2018-09-23 19:31:26,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:26,053 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 193 transitions. [2018-09-23 19:31:26,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:31:26,053 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 193 transitions. [2018-09-23 19:31:26,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-23 19:31:26,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:26,054 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1] [2018-09-23 19:31:26,054 INFO L423 AbstractCegarLoop]: === Iteration 29 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:26,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:26,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1019034353, now seen corresponding path program 27 times [2018-09-23 19:31:26,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:26,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:26,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:26,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:26,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:26,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:26,587 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:26,594 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:31:26,652 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-23 19:31:26,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:26,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:27,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:27,484 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2018-09-23 19:31:27,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:31:27,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:31:27,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:31:27,486 INFO L87 Difference]: Start difference. First operand 139 states and 193 transitions. Second operand 58 states. [2018-09-23 19:31:27,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:27,736 INFO L93 Difference]: Finished difference Result 150 states and 208 transitions. [2018-09-23 19:31:27,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:31:27,736 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 138 [2018-09-23 19:31:27,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:27,737 INFO L225 Difference]: With dead ends: 150 [2018-09-23 19:31:27,737 INFO L226 Difference]: Without dead ends: 148 [2018-09-23 19:31:27,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:31:27,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-23 19:31:27,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2018-09-23 19:31:27,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-23 19:31:27,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 200 transitions. [2018-09-23 19:31:27,744 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 200 transitions. Word has length 138 [2018-09-23 19:31:27,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:27,745 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 200 transitions. [2018-09-23 19:31:27,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:31:27,745 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 200 transitions. [2018-09-23 19:31:27,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-23 19:31:27,746 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:27,746 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1] [2018-09-23 19:31:27,746 INFO L423 AbstractCegarLoop]: === Iteration 30 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:27,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:27,746 INFO L82 PathProgramCache]: Analyzing trace with hash -247256096, now seen corresponding path program 28 times [2018-09-23 19:31:27,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:27,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:27,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:27,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:27,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:28,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:28,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:28,300 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:31:28,336 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:31:28,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:28,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:29,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:29,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 59 [2018-09-23 19:31:29,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:31:29,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:31:29,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:31:29,426 INFO L87 Difference]: Start difference. First operand 144 states and 200 transitions. Second operand 60 states. [2018-09-23 19:31:29,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:29,633 INFO L93 Difference]: Finished difference Result 155 states and 215 transitions. [2018-09-23 19:31:29,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:31:29,633 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 143 [2018-09-23 19:31:29,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:29,635 INFO L225 Difference]: With dead ends: 155 [2018-09-23 19:31:29,635 INFO L226 Difference]: Without dead ends: 153 [2018-09-23 19:31:29,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:31:29,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-23 19:31:29,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2018-09-23 19:31:29,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-23 19:31:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 207 transitions. [2018-09-23 19:31:29,642 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 207 transitions. Word has length 143 [2018-09-23 19:31:29,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:29,642 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 207 transitions. [2018-09-23 19:31:29,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:31:29,642 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 207 transitions. [2018-09-23 19:31:29,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-23 19:31:29,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:29,643 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1] [2018-09-23 19:31:29,644 INFO L423 AbstractCegarLoop]: === Iteration 31 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:29,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:29,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1791588433, now seen corresponding path program 29 times [2018-09-23 19:31:29,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:29,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:29,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:29,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:29,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:30,754 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:30,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:30,761 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:31:30,827 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-23 19:31:30,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:30,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:31,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:31,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2018-09-23 19:31:31,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 19:31:31,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 19:31:31,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:31:31,937 INFO L87 Difference]: Start difference. First operand 149 states and 207 transitions. Second operand 62 states. [2018-09-23 19:31:32,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:32,140 INFO L93 Difference]: Finished difference Result 160 states and 222 transitions. [2018-09-23 19:31:32,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:31:32,140 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 148 [2018-09-23 19:31:32,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:32,141 INFO L225 Difference]: With dead ends: 160 [2018-09-23 19:31:32,141 INFO L226 Difference]: Without dead ends: 158 [2018-09-23 19:31:32,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:31:32,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-23 19:31:32,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2018-09-23 19:31:32,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-23 19:31:32,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 214 transitions. [2018-09-23 19:31:32,148 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 214 transitions. Word has length 148 [2018-09-23 19:31:32,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:32,148 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 214 transitions. [2018-09-23 19:31:32,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 19:31:32,148 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 214 transitions. [2018-09-23 19:31:32,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-23 19:31:32,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:32,149 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1] [2018-09-23 19:31:32,149 INFO L423 AbstractCegarLoop]: === Iteration 32 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:32,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:32,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1713785472, now seen corresponding path program 30 times [2018-09-23 19:31:32,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:32,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:32,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:32,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:32,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:32,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:32,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:32,787 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:31:32,857 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 19:31:32,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:32,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:33,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:33,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-09-23 19:31:33,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 19:31:33,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 19:31:33,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:31:33,928 INFO L87 Difference]: Start difference. First operand 154 states and 214 transitions. Second operand 64 states. [2018-09-23 19:31:34,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:34,425 INFO L93 Difference]: Finished difference Result 165 states and 229 transitions. [2018-09-23 19:31:34,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:31:34,426 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 153 [2018-09-23 19:31:34,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:34,427 INFO L225 Difference]: With dead ends: 165 [2018-09-23 19:31:34,427 INFO L226 Difference]: Without dead ends: 163 [2018-09-23 19:31:34,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:31:34,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-23 19:31:34,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-09-23 19:31:34,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-23 19:31:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 221 transitions. [2018-09-23 19:31:34,434 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 221 transitions. Word has length 153 [2018-09-23 19:31:34,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:34,435 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 221 transitions. [2018-09-23 19:31:34,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 19:31:34,435 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 221 transitions. [2018-09-23 19:31:34,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-23 19:31:34,436 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:34,436 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1] [2018-09-23 19:31:34,436 INFO L423 AbstractCegarLoop]: === Iteration 33 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:34,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:34,437 INFO L82 PathProgramCache]: Analyzing trace with hash -835682895, now seen corresponding path program 31 times [2018-09-23 19:31:34,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:34,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:34,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:34,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:34,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:35,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:35,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:35,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:35,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:36,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:36,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2018-09-23 19:31:36,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 19:31:36,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 19:31:36,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:31:36,390 INFO L87 Difference]: Start difference. First operand 159 states and 221 transitions. Second operand 66 states. [2018-09-23 19:31:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:36,646 INFO L93 Difference]: Finished difference Result 170 states and 236 transitions. [2018-09-23 19:31:36,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:31:36,646 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 158 [2018-09-23 19:31:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:36,648 INFO L225 Difference]: With dead ends: 170 [2018-09-23 19:31:36,648 INFO L226 Difference]: Without dead ends: 168 [2018-09-23 19:31:36,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:31:36,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-09-23 19:31:36,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2018-09-23 19:31:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-23 19:31:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 228 transitions. [2018-09-23 19:31:36,655 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 228 transitions. Word has length 158 [2018-09-23 19:31:36,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:36,655 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 228 transitions. [2018-09-23 19:31:36,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 19:31:36,655 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 228 transitions. [2018-09-23 19:31:36,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-23 19:31:36,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:36,657 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1] [2018-09-23 19:31:36,657 INFO L423 AbstractCegarLoop]: === Iteration 34 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:36,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:36,657 INFO L82 PathProgramCache]: Analyzing trace with hash 925606176, now seen corresponding path program 32 times [2018-09-23 19:31:36,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:36,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:36,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:36,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:36,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:37,707 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:37,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:37,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:31:37,765 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:31:37,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:37,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:38,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:38,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 67 [2018-09-23 19:31:38,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 19:31:38,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 19:31:38,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:31:38,856 INFO L87 Difference]: Start difference. First operand 164 states and 228 transitions. Second operand 68 states. [2018-09-23 19:31:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:39,149 INFO L93 Difference]: Finished difference Result 175 states and 243 transitions. [2018-09-23 19:31:39,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:31:39,150 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 163 [2018-09-23 19:31:39,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:39,151 INFO L225 Difference]: With dead ends: 175 [2018-09-23 19:31:39,151 INFO L226 Difference]: Without dead ends: 173 [2018-09-23 19:31:39,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:31:39,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-23 19:31:39,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2018-09-23 19:31:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-23 19:31:39,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 235 transitions. [2018-09-23 19:31:39,158 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 235 transitions. Word has length 163 [2018-09-23 19:31:39,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:39,158 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 235 transitions. [2018-09-23 19:31:39,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 19:31:39,158 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 235 transitions. [2018-09-23 19:31:39,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-23 19:31:39,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:39,159 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1] [2018-09-23 19:31:39,160 INFO L423 AbstractCegarLoop]: === Iteration 35 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:39,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:39,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1441248495, now seen corresponding path program 33 times [2018-09-23 19:31:39,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:39,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:39,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:39,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:39,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:40,248 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:40,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:40,258 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:31:40,334 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-23 19:31:40,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:40,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:41,647 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:41,647 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2018-09-23 19:31:41,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 19:31:41,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 19:31:41,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:31:41,649 INFO L87 Difference]: Start difference. First operand 169 states and 235 transitions. Second operand 70 states. [2018-09-23 19:31:42,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:42,117 INFO L93 Difference]: Finished difference Result 180 states and 250 transitions. [2018-09-23 19:31:42,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:31:42,118 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 168 [2018-09-23 19:31:42,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:42,119 INFO L225 Difference]: With dead ends: 180 [2018-09-23 19:31:42,119 INFO L226 Difference]: Without dead ends: 178 [2018-09-23 19:31:42,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:31:42,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-09-23 19:31:42,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2018-09-23 19:31:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-09-23 19:31:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 242 transitions. [2018-09-23 19:31:42,125 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 242 transitions. Word has length 168 [2018-09-23 19:31:42,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:42,126 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 242 transitions. [2018-09-23 19:31:42,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 19:31:42,126 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 242 transitions. [2018-09-23 19:31:42,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-23 19:31:42,127 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:42,127 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1] [2018-09-23 19:31:42,127 INFO L423 AbstractCegarLoop]: === Iteration 36 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:42,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:42,127 INFO L82 PathProgramCache]: Analyzing trace with hash 686632896, now seen corresponding path program 34 times [2018-09-23 19:31:42,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:42,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:42,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:42,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:42,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:43,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:43,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:43,449 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:31:43,489 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:31:43,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:43,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:44,592 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:44,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 71 [2018-09-23 19:31:44,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 19:31:44,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 19:31:44,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:31:44,595 INFO L87 Difference]: Start difference. First operand 174 states and 242 transitions. Second operand 72 states. [2018-09-23 19:31:45,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:45,058 INFO L93 Difference]: Finished difference Result 185 states and 257 transitions. [2018-09-23 19:31:45,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:31:45,059 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 173 [2018-09-23 19:31:45,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:45,061 INFO L225 Difference]: With dead ends: 185 [2018-09-23 19:31:45,061 INFO L226 Difference]: Without dead ends: 183 [2018-09-23 19:31:45,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:31:45,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-23 19:31:45,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-09-23 19:31:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-23 19:31:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 249 transitions. [2018-09-23 19:31:45,068 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 249 transitions. Word has length 173 [2018-09-23 19:31:45,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:45,068 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 249 transitions. [2018-09-23 19:31:45,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 19:31:45,069 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 249 transitions. [2018-09-23 19:31:45,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-23 19:31:45,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:45,070 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1] [2018-09-23 19:31:45,070 INFO L423 AbstractCegarLoop]: === Iteration 37 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:45,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:45,070 INFO L82 PathProgramCache]: Analyzing trace with hash 170319985, now seen corresponding path program 35 times [2018-09-23 19:31:45,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:45,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:45,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:45,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:45,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:46,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:46,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:46,651 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:31:46,732 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-23 19:31:46,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:46,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:48,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:48,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2018-09-23 19:31:48,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 19:31:48,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 19:31:48,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:31:48,683 INFO L87 Difference]: Start difference. First operand 179 states and 249 transitions. Second operand 74 states. [2018-09-23 19:31:49,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:49,002 INFO L93 Difference]: Finished difference Result 190 states and 264 transitions. [2018-09-23 19:31:49,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:31:49,003 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 178 [2018-09-23 19:31:49,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:49,004 INFO L225 Difference]: With dead ends: 190 [2018-09-23 19:31:49,004 INFO L226 Difference]: Without dead ends: 188 [2018-09-23 19:31:49,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:31:49,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-09-23 19:31:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2018-09-23 19:31:49,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-23 19:31:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 256 transitions. [2018-09-23 19:31:49,011 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 256 transitions. Word has length 178 [2018-09-23 19:31:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:49,011 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 256 transitions. [2018-09-23 19:31:49,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 19:31:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 256 transitions. [2018-09-23 19:31:49,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-23 19:31:49,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:49,013 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1] [2018-09-23 19:31:49,013 INFO L423 AbstractCegarLoop]: === Iteration 38 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:49,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:49,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2021329312, now seen corresponding path program 36 times [2018-09-23 19:31:49,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:49,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:49,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:49,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:49,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:50,055 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:50,055 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:50,063 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:31:50,148 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 19:31:50,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:50,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:52,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:52,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 75 [2018-09-23 19:31:52,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 19:31:52,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 19:31:52,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:31:52,007 INFO L87 Difference]: Start difference. First operand 184 states and 256 transitions. Second operand 76 states. [2018-09-23 19:31:52,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:52,349 INFO L93 Difference]: Finished difference Result 195 states and 271 transitions. [2018-09-23 19:31:52,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:31:52,350 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 183 [2018-09-23 19:31:52,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:52,351 INFO L225 Difference]: With dead ends: 195 [2018-09-23 19:31:52,351 INFO L226 Difference]: Without dead ends: 193 [2018-09-23 19:31:52,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:31:52,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-23 19:31:52,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2018-09-23 19:31:52,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-23 19:31:52,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 263 transitions. [2018-09-23 19:31:52,358 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 263 transitions. Word has length 183 [2018-09-23 19:31:52,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:52,359 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 263 transitions. [2018-09-23 19:31:52,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 19:31:52,359 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 263 transitions. [2018-09-23 19:31:52,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-23 19:31:52,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:52,360 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1] [2018-09-23 19:31:52,360 INFO L423 AbstractCegarLoop]: === Iteration 39 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:52,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:52,361 INFO L82 PathProgramCache]: Analyzing trace with hash 578960849, now seen corresponding path program 37 times [2018-09-23 19:31:52,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:52,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:52,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:52,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:52,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:53,716 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:53,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:53,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:53,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:55,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:55,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 77 [2018-09-23 19:31:55,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 19:31:55,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 19:31:55,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:31:55,176 INFO L87 Difference]: Start difference. First operand 189 states and 263 transitions. Second operand 78 states. [2018-09-23 19:31:55,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:55,504 INFO L93 Difference]: Finished difference Result 200 states and 278 transitions. [2018-09-23 19:31:55,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:31:55,505 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 188 [2018-09-23 19:31:55,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:55,506 INFO L225 Difference]: With dead ends: 200 [2018-09-23 19:31:55,506 INFO L226 Difference]: Without dead ends: 198 [2018-09-23 19:31:55,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:31:55,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-09-23 19:31:55,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2018-09-23 19:31:55,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-09-23 19:31:55,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 270 transitions. [2018-09-23 19:31:55,514 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 270 transitions. Word has length 188 [2018-09-23 19:31:55,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:55,514 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 270 transitions. [2018-09-23 19:31:55,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 19:31:55,514 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 270 transitions. [2018-09-23 19:31:55,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-09-23 19:31:55,515 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:55,515 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1] [2018-09-23 19:31:55,515 INFO L423 AbstractCegarLoop]: === Iteration 40 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:55,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:55,516 INFO L82 PathProgramCache]: Analyzing trace with hash -963840768, now seen corresponding path program 38 times [2018-09-23 19:31:55,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:55,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:55,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:55,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:55,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:56,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:56,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:56,727 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:31:56,771 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:31:56,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:56,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:58,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:58,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 79 [2018-09-23 19:31:58,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 19:31:58,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 19:31:58,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:31:58,056 INFO L87 Difference]: Start difference. First operand 194 states and 270 transitions. Second operand 80 states. [2018-09-23 19:31:58,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:58,414 INFO L93 Difference]: Finished difference Result 205 states and 285 transitions. [2018-09-23 19:31:58,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:31:58,415 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 193 [2018-09-23 19:31:58,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:58,416 INFO L225 Difference]: With dead ends: 205 [2018-09-23 19:31:58,416 INFO L226 Difference]: Without dead ends: 203 [2018-09-23 19:31:58,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:31:58,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-23 19:31:58,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-09-23 19:31:58,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-23 19:31:58,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 277 transitions. [2018-09-23 19:31:58,424 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 277 transitions. Word has length 193 [2018-09-23 19:31:58,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:58,424 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 277 transitions. [2018-09-23 19:31:58,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 19:31:58,424 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 277 transitions. [2018-09-23 19:31:58,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-23 19:31:58,425 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:58,425 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1] [2018-09-23 19:31:58,426 INFO L423 AbstractCegarLoop]: === Iteration 41 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:58,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:58,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1345297615, now seen corresponding path program 39 times [2018-09-23 19:31:58,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:58,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:58,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:58,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:31:58,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:59,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:59,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:59,662 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:31:59,748 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-23 19:31:59,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:31:59,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:01,383 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:01,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 81 [2018-09-23 19:32:01,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 19:32:01,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 19:32:01,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:32:01,385 INFO L87 Difference]: Start difference. First operand 199 states and 277 transitions. Second operand 82 states. [2018-09-23 19:32:01,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:01,765 INFO L93 Difference]: Finished difference Result 210 states and 292 transitions. [2018-09-23 19:32:01,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:32:01,765 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 198 [2018-09-23 19:32:01,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:01,766 INFO L225 Difference]: With dead ends: 210 [2018-09-23 19:32:01,766 INFO L226 Difference]: Without dead ends: 208 [2018-09-23 19:32:01,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:32:01,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-09-23 19:32:01,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2018-09-23 19:32:01,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-09-23 19:32:01,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 284 transitions. [2018-09-23 19:32:01,772 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 284 transitions. Word has length 198 [2018-09-23 19:32:01,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:01,772 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 284 transitions. [2018-09-23 19:32:01,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 19:32:01,772 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 284 transitions. [2018-09-23 19:32:01,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-23 19:32:01,773 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:01,773 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1] [2018-09-23 19:32:01,773 INFO L423 AbstractCegarLoop]: === Iteration 42 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:01,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:01,773 INFO L82 PathProgramCache]: Analyzing trace with hash 555690912, now seen corresponding path program 40 times [2018-09-23 19:32:01,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:01,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:01,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:01,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:01,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:03,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:03,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:03,179 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:32:03,226 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:32:03,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:03,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:04,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:04,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 83 [2018-09-23 19:32:04,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 19:32:04,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 19:32:04,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:32:04,628 INFO L87 Difference]: Start difference. First operand 204 states and 284 transitions. Second operand 84 states. [2018-09-23 19:32:04,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:04,993 INFO L93 Difference]: Finished difference Result 215 states and 299 transitions. [2018-09-23 19:32:04,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:32:04,993 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 203 [2018-09-23 19:32:04,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:04,994 INFO L225 Difference]: With dead ends: 215 [2018-09-23 19:32:04,994 INFO L226 Difference]: Without dead ends: 213 [2018-09-23 19:32:04,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:32:04,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-23 19:32:04,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2018-09-23 19:32:04,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-23 19:32:04,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 291 transitions. [2018-09-23 19:32:05,000 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 291 transitions. Word has length 203 [2018-09-23 19:32:05,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:05,000 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 291 transitions. [2018-09-23 19:32:05,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 19:32:05,000 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 291 transitions. [2018-09-23 19:32:05,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-23 19:32:05,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:05,001 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1] [2018-09-23 19:32:05,001 INFO L423 AbstractCegarLoop]: === Iteration 43 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:05,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:05,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1463242897, now seen corresponding path program 41 times [2018-09-23 19:32:05,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:05,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:05,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:05,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:05,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:05,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:05,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:05,973 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:32:06,072 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-23 19:32:06,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:06,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:10,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:10,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 85 [2018-09-23 19:32:10,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 19:32:10,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 19:32:10,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:32:10,073 INFO L87 Difference]: Start difference. First operand 209 states and 291 transitions. Second operand 86 states. [2018-09-23 19:32:10,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:10,468 INFO L93 Difference]: Finished difference Result 220 states and 306 transitions. [2018-09-23 19:32:10,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:32:10,469 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 208 [2018-09-23 19:32:10,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:10,470 INFO L225 Difference]: With dead ends: 220 [2018-09-23 19:32:10,470 INFO L226 Difference]: Without dead ends: 218 [2018-09-23 19:32:10,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:32:10,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-09-23 19:32:10,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2018-09-23 19:32:10,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-09-23 19:32:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 298 transitions. [2018-09-23 19:32:10,477 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 298 transitions. Word has length 208 [2018-09-23 19:32:10,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:10,477 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 298 transitions. [2018-09-23 19:32:10,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 19:32:10,477 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 298 transitions. [2018-09-23 19:32:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-09-23 19:32:10,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:10,479 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1] [2018-09-23 19:32:10,479 INFO L423 AbstractCegarLoop]: === Iteration 44 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:10,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:10,479 INFO L82 PathProgramCache]: Analyzing trace with hash 970299968, now seen corresponding path program 42 times [2018-09-23 19:32:10,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:10,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:10,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:10,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:10,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:11,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:11,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:11,772 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:32:11,862 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 19:32:11,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:11,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:13,603 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:13,603 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 87 [2018-09-23 19:32:13,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 19:32:13,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 19:32:13,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:32:13,605 INFO L87 Difference]: Start difference. First operand 214 states and 298 transitions. Second operand 88 states. [2018-09-23 19:32:14,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:14,023 INFO L93 Difference]: Finished difference Result 225 states and 313 transitions. [2018-09-23 19:32:14,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:32:14,024 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 213 [2018-09-23 19:32:14,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:14,025 INFO L225 Difference]: With dead ends: 225 [2018-09-23 19:32:14,026 INFO L226 Difference]: Without dead ends: 223 [2018-09-23 19:32:14,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:32:14,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-23 19:32:14,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2018-09-23 19:32:14,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-23 19:32:14,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 305 transitions. [2018-09-23 19:32:14,034 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 305 transitions. Word has length 213 [2018-09-23 19:32:14,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:14,035 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 305 transitions. [2018-09-23 19:32:14,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 19:32:14,035 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 305 transitions. [2018-09-23 19:32:14,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-23 19:32:14,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:14,036 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1] [2018-09-23 19:32:14,037 INFO L423 AbstractCegarLoop]: === Iteration 45 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:14,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:14,037 INFO L82 PathProgramCache]: Analyzing trace with hash 106759665, now seen corresponding path program 43 times [2018-09-23 19:32:14,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:14,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:14,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:14,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:14,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:15,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:15,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:15,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:15,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:17,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:17,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 89 [2018-09-23 19:32:17,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 19:32:17,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 19:32:17,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:32:17,120 INFO L87 Difference]: Start difference. First operand 219 states and 305 transitions. Second operand 90 states. [2018-09-23 19:32:17,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:17,565 INFO L93 Difference]: Finished difference Result 230 states and 320 transitions. [2018-09-23 19:32:17,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:32:17,567 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 218 [2018-09-23 19:32:17,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:17,568 INFO L225 Difference]: With dead ends: 230 [2018-09-23 19:32:17,568 INFO L226 Difference]: Without dead ends: 228 [2018-09-23 19:32:17,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:32:17,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-09-23 19:32:17,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2018-09-23 19:32:17,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-09-23 19:32:17,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 312 transitions. [2018-09-23 19:32:17,574 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 312 transitions. Word has length 218 [2018-09-23 19:32:17,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:17,575 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 312 transitions. [2018-09-23 19:32:17,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 19:32:17,575 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 312 transitions. [2018-09-23 19:32:17,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-09-23 19:32:17,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:17,576 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1] [2018-09-23 19:32:17,576 INFO L423 AbstractCegarLoop]: === Iteration 46 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:17,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:17,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1161150240, now seen corresponding path program 44 times [2018-09-23 19:32:17,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:17,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:17,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:17,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:17,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:18,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:18,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:18,664 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:18,720 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:18,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:18,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:20,410 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:20,411 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 91 [2018-09-23 19:32:20,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 19:32:20,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 19:32:20,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:32:20,412 INFO L87 Difference]: Start difference. First operand 224 states and 312 transitions. Second operand 92 states. [2018-09-23 19:32:20,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:20,850 INFO L93 Difference]: Finished difference Result 235 states and 327 transitions. [2018-09-23 19:32:20,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:32:20,850 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 223 [2018-09-23 19:32:20,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:20,851 INFO L225 Difference]: With dead ends: 235 [2018-09-23 19:32:20,851 INFO L226 Difference]: Without dead ends: 233 [2018-09-23 19:32:20,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:32:20,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-09-23 19:32:20,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2018-09-23 19:32:20,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-23 19:32:20,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 319 transitions. [2018-09-23 19:32:20,857 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 319 transitions. Word has length 223 [2018-09-23 19:32:20,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:20,857 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 319 transitions. [2018-09-23 19:32:20,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 19:32:20,858 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 319 transitions. [2018-09-23 19:32:20,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-23 19:32:20,859 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:20,859 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1] [2018-09-23 19:32:20,859 INFO L423 AbstractCegarLoop]: === Iteration 47 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:20,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:20,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1399292753, now seen corresponding path program 45 times [2018-09-23 19:32:20,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:20,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:20,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:20,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:20,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:22,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:22,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:22,207 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:32:22,309 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-23 19:32:22,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:22,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:24,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:24,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 93 [2018-09-23 19:32:24,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 19:32:24,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 19:32:24,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:32:24,116 INFO L87 Difference]: Start difference. First operand 229 states and 319 transitions. Second operand 94 states. [2018-09-23 19:32:24,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:24,571 INFO L93 Difference]: Finished difference Result 240 states and 334 transitions. [2018-09-23 19:32:24,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:32:24,572 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 228 [2018-09-23 19:32:24,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:24,573 INFO L225 Difference]: With dead ends: 240 [2018-09-23 19:32:24,573 INFO L226 Difference]: Without dead ends: 238 [2018-09-23 19:32:24,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:32:24,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-09-23 19:32:24,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2018-09-23 19:32:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-09-23 19:32:24,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 326 transitions. [2018-09-23 19:32:24,580 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 326 transitions. Word has length 228 [2018-09-23 19:32:24,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:24,580 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 326 transitions. [2018-09-23 19:32:24,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 19:32:24,581 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 326 transitions. [2018-09-23 19:32:24,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-09-23 19:32:24,582 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:24,582 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1] [2018-09-23 19:32:24,582 INFO L423 AbstractCegarLoop]: === Iteration 48 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:24,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:24,583 INFO L82 PathProgramCache]: Analyzing trace with hash -174645376, now seen corresponding path program 46 times [2018-09-23 19:32:24,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:24,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:24,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:24,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:24,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:25,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:25,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:25,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:25,672 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:32:25,745 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:32:25,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:25,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:28,068 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:28,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2018-09-23 19:32:28,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 19:32:28,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 19:32:28,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:32:28,071 INFO L87 Difference]: Start difference. First operand 234 states and 326 transitions. Second operand 96 states. [2018-09-23 19:32:28,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:28,620 INFO L93 Difference]: Finished difference Result 245 states and 341 transitions. [2018-09-23 19:32:28,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:32:28,620 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 233 [2018-09-23 19:32:28,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:28,622 INFO L225 Difference]: With dead ends: 245 [2018-09-23 19:32:28,622 INFO L226 Difference]: Without dead ends: 243 [2018-09-23 19:32:28,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:32:28,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-23 19:32:28,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2018-09-23 19:32:28,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-23 19:32:28,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 333 transitions. [2018-09-23 19:32:28,630 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 333 transitions. Word has length 233 [2018-09-23 19:32:28,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:28,630 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 333 transitions. [2018-09-23 19:32:28,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 19:32:28,630 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 333 transitions. [2018-09-23 19:32:28,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-23 19:32:28,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:28,632 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1] [2018-09-23 19:32:28,632 INFO L423 AbstractCegarLoop]: === Iteration 49 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:28,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:28,632 INFO L82 PathProgramCache]: Analyzing trace with hash -587413327, now seen corresponding path program 47 times [2018-09-23 19:32:28,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:28,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:28,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:28,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:28,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:29,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:29,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:29,828 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:32:29,938 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-23 19:32:29,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:29,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:32,108 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:32,108 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2018-09-23 19:32:32,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 19:32:32,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 19:32:32,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:32:32,110 INFO L87 Difference]: Start difference. First operand 239 states and 333 transitions. Second operand 98 states. [2018-09-23 19:32:32,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:32,630 INFO L93 Difference]: Finished difference Result 250 states and 348 transitions. [2018-09-23 19:32:32,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:32:32,630 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 238 [2018-09-23 19:32:32,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:32,631 INFO L225 Difference]: With dead ends: 250 [2018-09-23 19:32:32,632 INFO L226 Difference]: Without dead ends: 248 [2018-09-23 19:32:32,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:32:32,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-09-23 19:32:32,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2018-09-23 19:32:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-09-23 19:32:32,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 340 transitions. [2018-09-23 19:32:32,640 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 340 transitions. Word has length 238 [2018-09-23 19:32:32,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:32,640 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 340 transitions. [2018-09-23 19:32:32,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 19:32:32,640 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 340 transitions. [2018-09-23 19:32:32,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-23 19:32:32,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:32,642 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1] [2018-09-23 19:32:32,642 INFO L423 AbstractCegarLoop]: === Iteration 50 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:32,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:32,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2091502048, now seen corresponding path program 48 times [2018-09-23 19:32:32,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:32,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:32,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:32,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:32,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:32,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:33,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:33,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:33,808 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:32:33,917 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 19:32:33,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:33,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:35,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:35,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 99 [2018-09-23 19:32:35,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 19:32:35,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 19:32:35,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:32:35,837 INFO L87 Difference]: Start difference. First operand 244 states and 340 transitions. Second operand 100 states. [2018-09-23 19:32:36,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:36,402 INFO L93 Difference]: Finished difference Result 255 states and 355 transitions. [2018-09-23 19:32:36,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:32:36,402 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 243 [2018-09-23 19:32:36,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:36,403 INFO L225 Difference]: With dead ends: 255 [2018-09-23 19:32:36,403 INFO L226 Difference]: Without dead ends: 253 [2018-09-23 19:32:36,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:32:36,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-09-23 19:32:36,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2018-09-23 19:32:36,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-09-23 19:32:36,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 347 transitions. [2018-09-23 19:32:36,409 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 347 transitions. Word has length 243 [2018-09-23 19:32:36,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:36,409 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 347 transitions. [2018-09-23 19:32:36,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 19:32:36,409 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 347 transitions. [2018-09-23 19:32:36,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-23 19:32:36,410 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:36,410 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1] [2018-09-23 19:32:36,411 INFO L423 AbstractCegarLoop]: === Iteration 51 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:36,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:36,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1438460399, now seen corresponding path program 49 times [2018-09-23 19:32:36,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:36,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:36,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:36,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:36,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:38,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:38,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:38,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:38,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:40,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:40,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 101 [2018-09-23 19:32:40,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 19:32:40,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 19:32:40,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:32:40,249 INFO L87 Difference]: Start difference. First operand 249 states and 347 transitions. Second operand 102 states. [2018-09-23 19:32:40,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:40,865 INFO L93 Difference]: Finished difference Result 260 states and 362 transitions. [2018-09-23 19:32:40,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:32:40,865 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 248 [2018-09-23 19:32:40,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:40,867 INFO L225 Difference]: With dead ends: 260 [2018-09-23 19:32:40,867 INFO L226 Difference]: Without dead ends: 258 [2018-09-23 19:32:40,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:32:40,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-09-23 19:32:40,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 254. [2018-09-23 19:32:40,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-09-23 19:32:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 354 transitions. [2018-09-23 19:32:40,875 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 354 transitions. Word has length 248 [2018-09-23 19:32:40,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:40,875 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 354 transitions. [2018-09-23 19:32:40,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 19:32:40,875 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 354 transitions. [2018-09-23 19:32:40,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-09-23 19:32:40,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:40,877 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1] [2018-09-23 19:32:40,877 INFO L423 AbstractCegarLoop]: === Iteration 52 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:40,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:40,877 INFO L82 PathProgramCache]: Analyzing trace with hash -459176768, now seen corresponding path program 50 times [2018-09-23 19:32:40,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:40,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:40,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:40,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:40,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:42,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:42,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:42,519 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:42,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:42,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:42,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:44,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:44,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 103 [2018-09-23 19:32:44,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 19:32:44,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 19:32:44,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:32:44,677 INFO L87 Difference]: Start difference. First operand 254 states and 354 transitions. Second operand 104 states. [2018-09-23 19:32:45,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:45,673 INFO L93 Difference]: Finished difference Result 265 states and 369 transitions. [2018-09-23 19:32:45,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:32:45,673 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 253 [2018-09-23 19:32:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:45,675 INFO L225 Difference]: With dead ends: 265 [2018-09-23 19:32:45,675 INFO L226 Difference]: Without dead ends: 263 [2018-09-23 19:32:45,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:32:45,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-09-23 19:32:45,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2018-09-23 19:32:45,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-23 19:32:45,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 361 transitions. [2018-09-23 19:32:45,684 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 361 transitions. Word has length 253 [2018-09-23 19:32:45,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:45,684 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 361 transitions. [2018-09-23 19:32:45,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 19:32:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 361 transitions. [2018-09-23 19:32:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-23 19:32:45,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:45,686 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1] [2018-09-23 19:32:45,686 INFO L423 AbstractCegarLoop]: === Iteration 53 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:45,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:45,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1965053071, now seen corresponding path program 51 times [2018-09-23 19:32:45,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:45,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:45,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:45,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:45,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 0 proven. 6426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:47,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:47,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:47,249 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:32:47,397 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-23 19:32:47,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:47,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 0 proven. 6426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:49,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:49,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 105 [2018-09-23 19:32:49,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-23 19:32:49,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-23 19:32:49,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:32:49,580 INFO L87 Difference]: Start difference. First operand 259 states and 361 transitions. Second operand 106 states. [2018-09-23 19:32:50,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:50,169 INFO L93 Difference]: Finished difference Result 270 states and 376 transitions. [2018-09-23 19:32:50,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:32:50,170 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 258 [2018-09-23 19:32:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:50,171 INFO L225 Difference]: With dead ends: 270 [2018-09-23 19:32:50,171 INFO L226 Difference]: Without dead ends: 268 [2018-09-23 19:32:50,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:32:50,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-09-23 19:32:50,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2018-09-23 19:32:50,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-09-23 19:32:50,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 368 transitions. [2018-09-23 19:32:50,177 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 368 transitions. Word has length 258 [2018-09-23 19:32:50,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:50,178 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 368 transitions. [2018-09-23 19:32:50,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-23 19:32:50,178 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 368 transitions. [2018-09-23 19:32:50,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-09-23 19:32:50,179 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:50,179 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1] [2018-09-23 19:32:50,180 INFO L423 AbstractCegarLoop]: === Iteration 54 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:50,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:50,180 INFO L82 PathProgramCache]: Analyzing trace with hash 563284832, now seen corresponding path program 52 times [2018-09-23 19:32:50,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:50,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:50,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:50,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:50,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 6682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:51,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:51,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:51,571 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:32:51,636 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:32:51,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:51,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 6682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:54,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:54,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 107 [2018-09-23 19:32:54,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-23 19:32:54,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-23 19:32:54,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:32:54,139 INFO L87 Difference]: Start difference. First operand 264 states and 368 transitions. Second operand 108 states. [2018-09-23 19:32:54,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:54,799 INFO L93 Difference]: Finished difference Result 275 states and 383 transitions. [2018-09-23 19:32:54,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:32:54,800 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 263 [2018-09-23 19:32:54,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:54,801 INFO L225 Difference]: With dead ends: 275 [2018-09-23 19:32:54,801 INFO L226 Difference]: Without dead ends: 273 [2018-09-23 19:32:54,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:32:54,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-09-23 19:32:54,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 269. [2018-09-23 19:32:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-09-23 19:32:54,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 375 transitions. [2018-09-23 19:32:54,807 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 375 transitions. Word has length 263 [2018-09-23 19:32:54,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:54,807 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 375 transitions. [2018-09-23 19:32:54,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-23 19:32:54,807 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 375 transitions. [2018-09-23 19:32:54,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-09-23 19:32:54,808 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:54,808 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1] [2018-09-23 19:32:54,809 INFO L423 AbstractCegarLoop]: === Iteration 55 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:54,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:54,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1996048593, now seen corresponding path program 53 times [2018-09-23 19:32:54,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:54,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:54,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:54,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:54,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 6943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:56,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:56,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:56,208 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:32:56,326 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-23 19:32:56,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:56,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 6943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:58,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:58,859 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 109 [2018-09-23 19:32:58,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-23 19:32:58,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-23 19:32:58,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 19:32:58,860 INFO L87 Difference]: Start difference. First operand 269 states and 375 transitions. Second operand 110 states. [2018-09-23 19:32:59,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:59,472 INFO L93 Difference]: Finished difference Result 280 states and 390 transitions. [2018-09-23 19:32:59,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:32:59,472 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 268 [2018-09-23 19:32:59,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:59,473 INFO L225 Difference]: With dead ends: 280 [2018-09-23 19:32:59,474 INFO L226 Difference]: Without dead ends: 278 [2018-09-23 19:32:59,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 19:32:59,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-09-23 19:32:59,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 274. [2018-09-23 19:32:59,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-09-23 19:32:59,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 382 transitions. [2018-09-23 19:32:59,480 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 382 transitions. Word has length 268 [2018-09-23 19:32:59,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:59,480 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 382 transitions. [2018-09-23 19:32:59,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-23 19:32:59,480 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 382 transitions. [2018-09-23 19:32:59,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-09-23 19:32:59,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:59,481 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1] [2018-09-23 19:32:59,481 INFO L423 AbstractCegarLoop]: === Iteration 56 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:59,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:59,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1774504448, now seen corresponding path program 54 times [2018-09-23 19:32:59,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:59,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:59,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:59,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:59,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:00,950 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:00,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:00,957 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:33:01,088 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-23 19:33:01,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:01,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:03,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:03,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 111 [2018-09-23 19:33:03,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-23 19:33:03,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-23 19:33:03,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 19:33:03,709 INFO L87 Difference]: Start difference. First operand 274 states and 382 transitions. Second operand 112 states. [2018-09-23 19:33:04,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:04,400 INFO L93 Difference]: Finished difference Result 285 states and 397 transitions. [2018-09-23 19:33:04,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:33:04,400 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 273 [2018-09-23 19:33:04,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:04,402 INFO L225 Difference]: With dead ends: 285 [2018-09-23 19:33:04,402 INFO L226 Difference]: Without dead ends: 283 [2018-09-23 19:33:04,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 19:33:04,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-09-23 19:33:04,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2018-09-23 19:33:04,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-09-23 19:33:04,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 389 transitions. [2018-09-23 19:33:04,410 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 389 transitions. Word has length 273 [2018-09-23 19:33:04,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:04,410 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 389 transitions. [2018-09-23 19:33:04,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-23 19:33:04,411 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 389 transitions. [2018-09-23 19:33:04,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-09-23 19:33:04,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:04,412 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1] [2018-09-23 19:33:04,412 INFO L423 AbstractCegarLoop]: === Iteration 57 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:04,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:04,413 INFO L82 PathProgramCache]: Analyzing trace with hash -281694671, now seen corresponding path program 55 times [2018-09-23 19:33:04,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:04,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:04,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:04,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:04,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 0 proven. 7480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:05,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:05,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:05,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:05,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 0 proven. 7480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:08,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:08,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 113 [2018-09-23 19:33:08,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-23 19:33:08,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-23 19:33:08,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 19:33:08,597 INFO L87 Difference]: Start difference. First operand 279 states and 389 transitions. Second operand 114 states. [2018-09-23 19:33:09,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:09,364 INFO L93 Difference]: Finished difference Result 290 states and 404 transitions. [2018-09-23 19:33:09,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:33:09,365 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 278 [2018-09-23 19:33:09,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:09,366 INFO L225 Difference]: With dead ends: 290 [2018-09-23 19:33:09,366 INFO L226 Difference]: Without dead ends: 288 [2018-09-23 19:33:09,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 19:33:09,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-09-23 19:33:09,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 284. [2018-09-23 19:33:09,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-09-23 19:33:09,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 396 transitions. [2018-09-23 19:33:09,371 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 396 transitions. Word has length 278 [2018-09-23 19:33:09,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:09,371 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 396 transitions. [2018-09-23 19:33:09,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-23 19:33:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 396 transitions. [2018-09-23 19:33:09,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-09-23 19:33:09,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:09,373 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1] [2018-09-23 19:33:09,373 INFO L423 AbstractCegarLoop]: === Iteration 58 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:09,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:09,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1269776224, now seen corresponding path program 56 times [2018-09-23 19:33:09,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:09,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:09,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:09,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:09,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 7756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:10,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:10,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:10,988 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:33:11,057 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:33:11,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:11,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 7756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:13,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:13,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 115 [2018-09-23 19:33:13,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-23 19:33:13,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-23 19:33:13,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-23 19:33:13,844 INFO L87 Difference]: Start difference. First operand 284 states and 396 transitions. Second operand 116 states. [2018-09-23 19:33:14,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:14,557 INFO L93 Difference]: Finished difference Result 295 states and 411 transitions. [2018-09-23 19:33:14,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:33:14,558 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 283 [2018-09-23 19:33:14,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:14,559 INFO L225 Difference]: With dead ends: 295 [2018-09-23 19:33:14,559 INFO L226 Difference]: Without dead ends: 293 [2018-09-23 19:33:14,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-23 19:33:14,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-09-23 19:33:14,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 289. [2018-09-23 19:33:14,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-09-23 19:33:14,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 403 transitions. [2018-09-23 19:33:14,565 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 403 transitions. Word has length 283 [2018-09-23 19:33:14,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:14,565 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 403 transitions. [2018-09-23 19:33:14,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-23 19:33:14,566 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 403 transitions. [2018-09-23 19:33:14,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-09-23 19:33:14,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:14,567 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1] [2018-09-23 19:33:14,567 INFO L423 AbstractCegarLoop]: === Iteration 59 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:14,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:14,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1555749777, now seen corresponding path program 57 times [2018-09-23 19:33:14,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:14,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:14,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:14,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:14,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:16,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:16,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:16,672 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:33:16,812 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-23 19:33:16,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:16,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:20,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:20,002 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 117 [2018-09-23 19:33:20,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-23 19:33:20,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-23 19:33:20,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-23 19:33:20,003 INFO L87 Difference]: Start difference. First operand 289 states and 403 transitions. Second operand 118 states. [2018-09-23 19:33:20,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:20,767 INFO L93 Difference]: Finished difference Result 300 states and 418 transitions. [2018-09-23 19:33:20,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:33:20,767 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 288 [2018-09-23 19:33:20,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:20,768 INFO L225 Difference]: With dead ends: 300 [2018-09-23 19:33:20,768 INFO L226 Difference]: Without dead ends: 298 [2018-09-23 19:33:20,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-23 19:33:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-09-23 19:33:20,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2018-09-23 19:33:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-09-23 19:33:20,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 410 transitions. [2018-09-23 19:33:20,776 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 410 transitions. Word has length 288 [2018-09-23 19:33:20,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:20,777 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 410 transitions. [2018-09-23 19:33:20,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-23 19:33:20,777 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 410 transitions. [2018-09-23 19:33:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-09-23 19:33:20,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:20,779 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1] [2018-09-23 19:33:20,779 INFO L423 AbstractCegarLoop]: === Iteration 60 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:20,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:20,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1607528256, now seen corresponding path program 58 times [2018-09-23 19:33:20,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:20,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:20,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:20,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:20,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:22,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 0 proven. 8323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:22,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:22,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:22,502 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:33:22,569 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:33:22,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:22,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 0 proven. 8323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:25,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:25,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 119 [2018-09-23 19:33:25,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-23 19:33:25,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-23 19:33:25,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-23 19:33:25,704 INFO L87 Difference]: Start difference. First operand 294 states and 410 transitions. Second operand 120 states. [2018-09-23 19:33:26,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:26,441 INFO L93 Difference]: Finished difference Result 305 states and 425 transitions. [2018-09-23 19:33:26,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:33:26,442 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 293 [2018-09-23 19:33:26,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:26,443 INFO L225 Difference]: With dead ends: 305 [2018-09-23 19:33:26,443 INFO L226 Difference]: Without dead ends: 303 [2018-09-23 19:33:26,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-23 19:33:26,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-09-23 19:33:26,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 299. [2018-09-23 19:33:26,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-09-23 19:33:26,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 417 transitions. [2018-09-23 19:33:26,452 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 417 transitions. Word has length 293 [2018-09-23 19:33:26,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:26,452 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 417 transitions. [2018-09-23 19:33:26,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-23 19:33:26,453 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 417 transitions. [2018-09-23 19:33:26,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-09-23 19:33:26,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:26,454 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1] [2018-09-23 19:33:26,454 INFO L423 AbstractCegarLoop]: === Iteration 61 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:26,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:26,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1898893553, now seen corresponding path program 59 times [2018-09-23 19:33:26,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:26,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:26,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:26,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:26,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 0 proven. 8614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:28,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:28,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:28,455 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:33:28,603 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-23 19:33:28,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:28,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 0 proven. 8614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:31,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:31,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 121 [2018-09-23 19:33:31,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-23 19:33:31,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-23 19:33:31,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-23 19:33:31,446 INFO L87 Difference]: Start difference. First operand 299 states and 417 transitions. Second operand 122 states. [2018-09-23 19:33:32,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:32,320 INFO L93 Difference]: Finished difference Result 310 states and 432 transitions. [2018-09-23 19:33:32,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:33:32,320 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 298 [2018-09-23 19:33:32,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:32,322 INFO L225 Difference]: With dead ends: 310 [2018-09-23 19:33:32,322 INFO L226 Difference]: Without dead ends: 308 [2018-09-23 19:33:32,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-23 19:33:32,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-09-23 19:33:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 304. [2018-09-23 19:33:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-09-23 19:33:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 424 transitions. [2018-09-23 19:33:32,329 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 424 transitions. Word has length 298 [2018-09-23 19:33:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:32,329 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 424 transitions. [2018-09-23 19:33:32,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-23 19:33:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 424 transitions. [2018-09-23 19:33:32,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-09-23 19:33:32,331 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:32,331 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1] [2018-09-23 19:33:32,331 INFO L423 AbstractCegarLoop]: === Iteration 62 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:32,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:32,331 INFO L82 PathProgramCache]: Analyzing trace with hash -765504032, now seen corresponding path program 60 times [2018-09-23 19:33:32,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:32,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:32,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:32,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:32,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8910 backedges. 0 proven. 8910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:34,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:34,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:34,336 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:33:34,476 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-23 19:33:34,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:34,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8910 backedges. 0 proven. 8910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:37,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:37,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 123 [2018-09-23 19:33:37,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-23 19:33:37,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-23 19:33:37,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-23 19:33:37,447 INFO L87 Difference]: Start difference. First operand 304 states and 424 transitions. Second operand 124 states. [2018-09-23 19:33:38,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:38,355 INFO L93 Difference]: Finished difference Result 315 states and 439 transitions. [2018-09-23 19:33:38,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:33:38,355 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 303 [2018-09-23 19:33:38,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:38,356 INFO L225 Difference]: With dead ends: 315 [2018-09-23 19:33:38,356 INFO L226 Difference]: Without dead ends: 313 [2018-09-23 19:33:38,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-23 19:33:38,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-09-23 19:33:38,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 309. [2018-09-23 19:33:38,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-09-23 19:33:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 431 transitions. [2018-09-23 19:33:38,362 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 431 transitions. Word has length 303 [2018-09-23 19:33:38,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:38,363 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 431 transitions. [2018-09-23 19:33:38,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-23 19:33:38,363 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 431 transitions. [2018-09-23 19:33:38,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-09-23 19:33:38,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:38,364 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1] [2018-09-23 19:33:38,364 INFO L423 AbstractCegarLoop]: === Iteration 63 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:38,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:38,364 INFO L82 PathProgramCache]: Analyzing trace with hash -2034790831, now seen corresponding path program 61 times [2018-09-23 19:33:38,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:38,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:38,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:38,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:38,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:40,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9211 backedges. 0 proven. 9211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:40,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:40,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:40,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:40,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9211 backedges. 0 proven. 9211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:43,306 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:43,306 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 125 [2018-09-23 19:33:43,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-23 19:33:43,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-23 19:33:43,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-23 19:33:43,308 INFO L87 Difference]: Start difference. First operand 309 states and 431 transitions. Second operand 126 states. [2018-09-23 19:33:44,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:44,175 INFO L93 Difference]: Finished difference Result 320 states and 446 transitions. [2018-09-23 19:33:44,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 19:33:44,175 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 308 [2018-09-23 19:33:44,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:44,176 INFO L225 Difference]: With dead ends: 320 [2018-09-23 19:33:44,176 INFO L226 Difference]: Without dead ends: 318 [2018-09-23 19:33:44,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7564 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-23 19:33:44,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-09-23 19:33:44,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 314. [2018-09-23 19:33:44,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-09-23 19:33:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 438 transitions. [2018-09-23 19:33:44,183 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 438 transitions. Word has length 308 [2018-09-23 19:33:44,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:44,183 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 438 transitions. [2018-09-23 19:33:44,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-23 19:33:44,183 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 438 transitions. [2018-09-23 19:33:44,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-09-23 19:33:44,185 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:44,185 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1] [2018-09-23 19:33:44,185 INFO L423 AbstractCegarLoop]: === Iteration 64 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:44,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:44,186 INFO L82 PathProgramCache]: Analyzing trace with hash 429257856, now seen corresponding path program 62 times [2018-09-23 19:33:44,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:44,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:44,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:44,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:44,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:46,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:46,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:46,036 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:33:46,110 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:33:46,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:46,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:49,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:49,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 127 [2018-09-23 19:33:49,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-23 19:33:49,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-23 19:33:49,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-23 19:33:49,373 INFO L87 Difference]: Start difference. First operand 314 states and 438 transitions. Second operand 128 states. [2018-09-23 19:33:50,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:50,318 INFO L93 Difference]: Finished difference Result 325 states and 453 transitions. [2018-09-23 19:33:50,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:33:50,318 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 313 [2018-09-23 19:33:50,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:50,320 INFO L225 Difference]: With dead ends: 325 [2018-09-23 19:33:50,320 INFO L226 Difference]: Without dead ends: 323 [2018-09-23 19:33:50,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-23 19:33:50,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-09-23 19:33:50,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2018-09-23 19:33:50,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-09-23 19:33:50,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 445 transitions. [2018-09-23 19:33:50,327 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 445 transitions. Word has length 313 [2018-09-23 19:33:50,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:50,327 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 445 transitions. [2018-09-23 19:33:50,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-23 19:33:50,328 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 445 transitions. [2018-09-23 19:33:50,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-09-23 19:33:50,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:50,329 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1] [2018-09-23 19:33:50,329 INFO L423 AbstractCegarLoop]: === Iteration 65 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:50,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:50,330 INFO L82 PathProgramCache]: Analyzing trace with hash -322639, now seen corresponding path program 63 times [2018-09-23 19:33:50,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:50,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:50,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:50,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:50,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:52,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:52,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:52,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:33:52,864 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-23 19:33:52,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:52,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:56,400 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:56,400 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 129 [2018-09-23 19:33:56,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-23 19:33:56,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-23 19:33:56,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-23 19:33:56,403 INFO L87 Difference]: Start difference. First operand 319 states and 445 transitions. Second operand 130 states. [2018-09-23 19:33:57,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:57,369 INFO L93 Difference]: Finished difference Result 330 states and 460 transitions. [2018-09-23 19:33:57,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 19:33:57,369 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 318 [2018-09-23 19:33:57,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:57,370 INFO L225 Difference]: With dead ends: 330 [2018-09-23 19:33:57,370 INFO L226 Difference]: Without dead ends: 328 [2018-09-23 19:33:57,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-23 19:33:57,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-09-23 19:33:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2018-09-23 19:33:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2018-09-23 19:33:57,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 452 transitions. [2018-09-23 19:33:57,376 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 452 transitions. Word has length 318 [2018-09-23 19:33:57,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:57,377 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 452 transitions. [2018-09-23 19:33:57,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-23 19:33:57,377 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 452 transitions. [2018-09-23 19:33:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-09-23 19:33:57,378 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:57,378 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 1, 1, 1] [2018-09-23 19:33:57,378 INFO L423 AbstractCegarLoop]: === Iteration 66 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:57,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:57,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1970353376, now seen corresponding path program 64 times [2018-09-23 19:33:57,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:57,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:57,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:57,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:57,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 10144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:59,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:59,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:59,601 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:33:59,683 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:33:59,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:59,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 0 proven. 10144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:02,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:02,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 131 [2018-09-23 19:34:02,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-23 19:34:02,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-23 19:34:02,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-23 19:34:02,987 INFO L87 Difference]: Start difference. First operand 324 states and 452 transitions. Second operand 132 states. [2018-09-23 19:34:03,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:03,992 INFO L93 Difference]: Finished difference Result 335 states and 467 transitions. [2018-09-23 19:34:03,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:34:03,992 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 323 [2018-09-23 19:34:03,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:03,993 INFO L225 Difference]: With dead ends: 335 [2018-09-23 19:34:03,993 INFO L226 Difference]: Without dead ends: 333 [2018-09-23 19:34:03,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8320 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-23 19:34:03,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2018-09-23 19:34:03,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 329. [2018-09-23 19:34:03,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-09-23 19:34:03,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 459 transitions. [2018-09-23 19:34:03,999 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 459 transitions. Word has length 323 [2018-09-23 19:34:03,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:04,000 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 459 transitions. [2018-09-23 19:34:04,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-23 19:34:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 459 transitions. [2018-09-23 19:34:04,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-09-23 19:34:04,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:04,001 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 1, 1, 1] [2018-09-23 19:34:04,002 INFO L423 AbstractCegarLoop]: === Iteration 67 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:04,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:04,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1474338543, now seen corresponding path program 65 times [2018-09-23 19:34:04,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:04,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:04,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:04,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:04,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10465 backedges. 0 proven. 10465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:06,793 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:06,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-23 19:34:06,802 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:34:06,956 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-23 19:34:06,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:06,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10465 backedges. 0 proven. 10465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:10,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:10,598 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 133 [2018-09-23 19:34:10,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-23 19:34:10,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-23 19:34:10,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-23 19:34:10,600 INFO L87 Difference]: Start difference. First operand 329 states and 459 transitions. Second operand 134 states. [2018-09-23 19:34:11,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:11,665 INFO L93 Difference]: Finished difference Result 340 states and 474 transitions. [2018-09-23 19:34:11,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 19:34:11,665 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 328 [2018-09-23 19:34:11,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:11,667 INFO L225 Difference]: With dead ends: 340 [2018-09-23 19:34:11,667 INFO L226 Difference]: Without dead ends: 338 [2018-09-23 19:34:11,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-23 19:34:11,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-09-23 19:34:11,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 334. [2018-09-23 19:34:11,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2018-09-23 19:34:11,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 466 transitions. [2018-09-23 19:34:11,674 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 466 transitions. Word has length 328 [2018-09-23 19:34:11,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:11,675 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 466 transitions. [2018-09-23 19:34:11,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-23 19:34:11,675 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 466 transitions. [2018-09-23 19:34:11,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-09-23 19:34:11,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:11,676 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 1, 1, 1] [2018-09-23 19:34:11,676 INFO L423 AbstractCegarLoop]: === Iteration 68 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:11,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:11,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1642322368, now seen corresponding path program 66 times [2018-09-23 19:34:11,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:11,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:11,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:11,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:11,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 10791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:13,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:13,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:34:13,836 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:34:13,998 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-23 19:34:13,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:14,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 10791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:17,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:17,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 135 [2018-09-23 19:34:17,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-23 19:34:17,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-23 19:34:17,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-23 19:34:17,680 INFO L87 Difference]: Start difference. First operand 334 states and 466 transitions. Second operand 136 states. [2018-09-23 19:34:18,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:18,641 INFO L93 Difference]: Finished difference Result 345 states and 481 transitions. [2018-09-23 19:34:18,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:34:18,641 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 333 [2018-09-23 19:34:18,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:18,642 INFO L225 Difference]: With dead ends: 345 [2018-09-23 19:34:18,643 INFO L226 Difference]: Without dead ends: 343 [2018-09-23 19:34:18,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-23 19:34:18,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-09-23 19:34:18,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 339. [2018-09-23 19:34:18,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-09-23 19:34:18,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 473 transitions. [2018-09-23 19:34:18,649 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 473 transitions. Word has length 333 [2018-09-23 19:34:18,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:18,650 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 473 transitions. [2018-09-23 19:34:18,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-23 19:34:18,650 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 473 transitions. [2018-09-23 19:34:18,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-09-23 19:34:18,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:18,651 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 1, 1, 1] [2018-09-23 19:34:18,651 INFO L423 AbstractCegarLoop]: === Iteration 69 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:18,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:18,651 INFO L82 PathProgramCache]: Analyzing trace with hash 315258481, now seen corresponding path program 67 times [2018-09-23 19:34:18,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:18,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:18,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:18,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:18,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11122 backedges. 0 proven. 11122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:21,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:21,096 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:34:21,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:21,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11122 backedges. 0 proven. 11122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:24,765 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:24,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 137 [2018-09-23 19:34:24,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-23 19:34:24,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-23 19:34:24,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-23 19:34:24,768 INFO L87 Difference]: Start difference. First operand 339 states and 473 transitions. Second operand 138 states. [2018-09-23 19:34:25,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:25,938 INFO L93 Difference]: Finished difference Result 350 states and 488 transitions. [2018-09-23 19:34:25,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 19:34:25,939 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 338 [2018-09-23 19:34:25,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:25,940 INFO L225 Difference]: With dead ends: 350 [2018-09-23 19:34:25,940 INFO L226 Difference]: Without dead ends: 348 [2018-09-23 19:34:25,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9112 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-23 19:34:25,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2018-09-23 19:34:25,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2018-09-23 19:34:25,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2018-09-23 19:34:25,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 480 transitions. [2018-09-23 19:34:25,950 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 480 transitions. Word has length 338 [2018-09-23 19:34:25,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:25,950 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 480 transitions. [2018-09-23 19:34:25,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-23 19:34:25,950 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 480 transitions. [2018-09-23 19:34:25,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2018-09-23 19:34:25,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:25,952 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 1, 1, 1] [2018-09-23 19:34:25,952 INFO L423 AbstractCegarLoop]: === Iteration 70 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:25,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:25,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1672421472, now seen corresponding path program 68 times [2018-09-23 19:34:25,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:25,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:25,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:25,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:25,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11458 backedges. 0 proven. 11458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:28,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:28,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:34:28,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:34:28,258 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:34:28,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:28,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11458 backedges. 0 proven. 11458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:32,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:32,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 139 [2018-09-23 19:34:32,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-23 19:34:32,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-23 19:34:32,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-23 19:34:32,214 INFO L87 Difference]: Start difference. First operand 344 states and 480 transitions. Second operand 140 states. [2018-09-23 19:34:33,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:33,349 INFO L93 Difference]: Finished difference Result 355 states and 495 transitions. [2018-09-23 19:34:33,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:34:33,349 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 343 [2018-09-23 19:34:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:33,351 INFO L225 Difference]: With dead ends: 355 [2018-09-23 19:34:33,351 INFO L226 Difference]: Without dead ends: 353 [2018-09-23 19:34:33,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9384 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-23 19:34:33,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2018-09-23 19:34:33,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 349. [2018-09-23 19:34:33,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2018-09-23 19:34:33,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 487 transitions. [2018-09-23 19:34:33,359 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 487 transitions. Word has length 343 [2018-09-23 19:34:33,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:33,359 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 487 transitions. [2018-09-23 19:34:33,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-23 19:34:33,359 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 487 transitions. [2018-09-23 19:34:33,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-09-23 19:34:33,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:33,361 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 1, 1, 1] [2018-09-23 19:34:33,361 INFO L423 AbstractCegarLoop]: === Iteration 71 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:33,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:33,361 INFO L82 PathProgramCache]: Analyzing trace with hash -64859183, now seen corresponding path program 69 times [2018-09-23 19:34:33,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:33,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:33,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:33,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:33,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11799 backedges. 0 proven. 11799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:35,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:35,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:34:35,960 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:34:36,141 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-23 19:34:36,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:36,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11799 backedges. 0 proven. 11799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:39,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:39,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 141 [2018-09-23 19:34:39,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-23 19:34:39,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-23 19:34:39,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-23 19:34:39,913 INFO L87 Difference]: Start difference. First operand 349 states and 487 transitions. Second operand 142 states. [2018-09-23 19:34:41,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:41,123 INFO L93 Difference]: Finished difference Result 360 states and 502 transitions. [2018-09-23 19:34:41,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 19:34:41,123 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 348 [2018-09-23 19:34:41,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:41,125 INFO L225 Difference]: With dead ends: 360 [2018-09-23 19:34:41,125 INFO L226 Difference]: Without dead ends: 358 [2018-09-23 19:34:41,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-23 19:34:41,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2018-09-23 19:34:41,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 354. [2018-09-23 19:34:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2018-09-23 19:34:41,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 494 transitions. [2018-09-23 19:34:41,132 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 494 transitions. Word has length 348 [2018-09-23 19:34:41,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:41,132 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 494 transitions. [2018-09-23 19:34:41,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-23 19:34:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 494 transitions. [2018-09-23 19:34:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-09-23 19:34:41,134 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:41,134 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 1, 1, 1] [2018-09-23 19:34:41,134 INFO L423 AbstractCegarLoop]: === Iteration 72 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:41,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:41,134 INFO L82 PathProgramCache]: Analyzing trace with hash 2072682240, now seen corresponding path program 70 times [2018-09-23 19:34:41,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:41,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:41,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:41,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:41,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12145 backedges. 0 proven. 12145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:43,470 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:43,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:34:43,477 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:34:43,566 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:34:43,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:43,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12145 backedges. 0 proven. 12145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:47,614 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:47,614 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 143 [2018-09-23 19:34:47,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-23 19:34:47,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-23 19:34:47,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-23 19:34:47,617 INFO L87 Difference]: Start difference. First operand 354 states and 494 transitions. Second operand 144 states. [2018-09-23 19:34:48,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:48,865 INFO L93 Difference]: Finished difference Result 365 states and 509 transitions. [2018-09-23 19:34:48,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 19:34:48,866 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 353 [2018-09-23 19:34:48,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:48,867 INFO L225 Difference]: With dead ends: 365 [2018-09-23 19:34:48,867 INFO L226 Difference]: Without dead ends: 363 [2018-09-23 19:34:48,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-23 19:34:48,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-09-23 19:34:48,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 359. [2018-09-23 19:34:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-09-23 19:34:48,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 501 transitions. [2018-09-23 19:34:48,874 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 501 transitions. Word has length 353 [2018-09-23 19:34:48,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:48,874 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 501 transitions. [2018-09-23 19:34:48,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-23 19:34:48,874 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 501 transitions. [2018-09-23 19:34:48,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-09-23 19:34:48,875 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:48,875 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 1, 1, 1] [2018-09-23 19:34:48,876 INFO L423 AbstractCegarLoop]: === Iteration 73 === [GateControllerErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:48,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:48,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1462961871, now seen corresponding path program 71 times [2018-09-23 19:34:48,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:48,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:48,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:48,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:48,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 19:34:50,617 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:34:50,622 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:34:50,622 INFO L202 PluginConnector]: Adding new model RailwayCrossing.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:34:50 BoogieIcfgContainer [2018-09-23 19:34:50,622 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:34:50,623 INFO L168 Benchmark]: Toolchain (without parser) took 238930.88 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -93.3 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 289.8 MB). Peak memory consumption was 196.5 MB. Max. memory is 7.1 GB. [2018-09-23 19:34:50,625 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:34:50,625 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:34:50,626 INFO L168 Benchmark]: Boogie Preprocessor took 26.51 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:34:50,626 INFO L168 Benchmark]: RCFGBuilder took 403.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:34:50,627 INFO L168 Benchmark]: TraceAbstraction took 238448.92 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -93.3 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 268.7 MB). Peak memory consumption was 175.4 MB. Max. memory is 7.1 GB. [2018-09-23 19:34:50,629 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 0.22 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 44.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.51 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 403.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 238448.92 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -93.3 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 268.7 MB). Peak memory consumption was 175.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 39]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 39). Cancelled while BasicCegarLoop was analyzing trace of length 359 with TraceHistMax 71, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 60 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 238.3s OverallTime, 73 OverallIterations, 71 TraceHistogramMax, 32.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 589 SDtfs, 29245 SDslu, 21520 SDs, 0 SdLazy, 10196 SolverSat, 199 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15194 GetRequests, 10082 SyntacticMatches, 0 SemanticMatches, 5112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238560 ImplicationChecksByTransitivity, 172.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=359occurred in iteration=72, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 72 MinimizatonAttempts, 284 StatesRemovedByMinimization, 71 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 191.6s InterpolantComputationTime, 25280 NumberOfCodeBlocks, 25280 NumberOfCodeBlocksAsserted, 1379 NumberOfCheckSat, 25138 ConstructedInterpolants, 12495 QuantifiedInterpolants, 56213688 SizeOfPredicates, 2695 NumberOfNonLiveVariables, 23485 ConjunctsInSsa, 5250 ConjunctsInUnsatCore, 142 InterpolantComputations, 2 PerfectInterpolantSequences, 1/576521 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/RailwayCrossing.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-34-50-638.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/RailwayCrossing.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-34-50-638.csv Completed graceful shutdown