java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/NeonAngel01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-10-01 01:10:08,246 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-01 01:10:08,248 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-01 01:10:08,266 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-01 01:10:08,300 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-01 01:10:08,315 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-01 01:10:08,315 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-01 01:10:08,318 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-01 01:10:08,318 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-01 01:10:08,319 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-01 01:10:08,319 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-01 01:10:08,319 INFO L133 SettingsManager]: * Use SBE=true [2018-10-01 01:10:08,320 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-01 01:10:08,321 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-01 01:10:08,321 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-01 01:10:08,321 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-01 01:10:08,321 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-01 01:10:08,321 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-01 01:10:08,322 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-01 01:10:08,322 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-01 01:10:08,322 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-01 01:10:08,322 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-01 01:10:08,322 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-01 01:10:08,323 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-01 01:10:08,323 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-01 01:10:08,323 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-01 01:10:08,323 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-01 01:10:08,323 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 01:10:08,325 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-01 01:10:08,325 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-01 01:10:08,325 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-01 01:10:08,325 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-01 01:10:08,326 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-01 01:10:08,326 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-01 01:10:08,326 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-01 01:10:08,326 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-01 01:10:08,388 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-01 01:10:08,405 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-01 01:10:08,412 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-01 01:10:08,414 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-01 01:10:08,414 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-01 01:10:08,415 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/NeonAngel01.bpl [2018-10-01 01:10:08,416 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/NeonAngel01.bpl' [2018-10-01 01:10:08,473 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-01 01:10:08,476 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-01 01:10:08,477 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-01 01:10:08,477 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-01 01:10:08,479 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-01 01:10:08,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:10:08" (1/1) ... [2018-10-01 01:10:08,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:10:08" (1/1) ... [2018-10-01 01:10:08,519 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-01 01:10:08,519 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-01 01:10:08,520 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-01 01:10:08,522 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-01 01:10:08,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-01 01:10:08,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-01 01:10:08,523 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-01 01:10:08,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:10:08" (1/1) ... [2018-10-01 01:10:08,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:10:08" (1/1) ... [2018-10-01 01:10:08,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:10:08" (1/1) ... [2018-10-01 01:10:08,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:10:08" (1/1) ... [2018-10-01 01:10:08,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:10:08" (1/1) ... [2018-10-01 01:10:08,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:10:08" (1/1) ... [2018-10-01 01:10:08,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:10:08" (1/1) ... [2018-10-01 01:10:08,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-01 01:10:08,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-01 01:10:08,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-01 01:10:08,551 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-01 01:10:08,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:10:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 01:10:08,626 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-01 01:10:08,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-01 01:10:08,626 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-01 01:10:08,803 INFO L345 CfgBuilder]: Using library mode [2018-10-01 01:10:08,803 INFO L202 PluginConnector]: Adding new model NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 01:10:08 BoogieIcfgContainer [2018-10-01 01:10:08,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-01 01:10:08,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-01 01:10:08,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-01 01:10:08,811 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-01 01:10:08,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 01:10:08" (1/2) ... [2018-10-01 01:10:08,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ef0d58 and model type NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 01:10:08, skipping insertion in model container [2018-10-01 01:10:08,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "NeonAngel01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 01:10:08" (2/2) ... [2018-10-01 01:10:08,815 INFO L112 eAbstractionObserver]: Analyzing ICFG NeonAngel01.bpl [2018-10-01 01:10:08,829 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-01 01:10:08,844 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-01 01:10:08,899 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-01 01:10:08,900 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-01 01:10:08,900 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-01 01:10:08,900 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-01 01:10:08,900 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-01 01:10:08,901 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-01 01:10:08,901 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-01 01:10:08,901 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-01 01:10:08,901 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-01 01:10:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-01 01:10:08,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-01 01:10:08,938 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:08,939 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-01 01:10:08,940 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:08,949 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:08,949 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-10-01 01:10:08,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:08,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:08,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:08,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:08,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:09,105 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 01:10:09,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-01 01:10:09,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-01 01:10:09,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-01 01:10:09,121 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:09,123 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-01 01:10:09,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:09,330 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-01 01:10:09,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-01 01:10:09,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-01 01:10:09,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:09,358 INFO L225 Difference]: With dead ends: 13 [2018-10-01 01:10:09,358 INFO L226 Difference]: Without dead ends: 5 [2018-10-01 01:10:09,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:09,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-01 01:10:09,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-01 01:10:09,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-01 01:10:09,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-01 01:10:09,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-01 01:10:09,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:09,397 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-01 01:10:09,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-01 01:10:09,398 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-01 01:10:09,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-01 01:10:09,398 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:09,398 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-01 01:10:09,399 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:09,399 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:09,399 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-10-01 01:10:09,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:09,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:09,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:09,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:09,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:09,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:09,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:09,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:09,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:09,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:09,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-01 01:10:09,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-01 01:10:09,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-01 01:10:09,594 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:09,594 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-10-01 01:10:09,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:09,687 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-01 01:10:09,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-01 01:10:09,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-10-01 01:10:09,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:09,688 INFO L225 Difference]: With dead ends: 8 [2018-10-01 01:10:09,688 INFO L226 Difference]: Without dead ends: 6 [2018-10-01 01:10:09,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:09,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-01 01:10:09,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-01 01:10:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-01 01:10:09,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-01 01:10:09,692 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-01 01:10:09,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:09,692 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-01 01:10:09,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-01 01:10:09,692 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-01 01:10:09,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-01 01:10:09,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:09,693 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-01 01:10:09,693 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:09,693 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:09,694 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-10-01 01:10:09,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:09,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:09,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:09,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:09,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:09,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:09,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:09,767 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:10:09,789 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:10:09,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:09,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:09,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:09,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-01 01:10:09,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-01 01:10:09,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-01 01:10:09,834 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:09,835 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-01 01:10:09,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:09,990 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-01 01:10:09,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 01:10:09,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-01 01:10:09,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:09,992 INFO L225 Difference]: With dead ends: 9 [2018-10-01 01:10:09,992 INFO L226 Difference]: Without dead ends: 7 [2018-10-01 01:10:09,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 01:10:09,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-01 01:10:09,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-01 01:10:09,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-01 01:10:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-01 01:10:09,996 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-01 01:10:09,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:09,997 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-01 01:10:09,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-01 01:10:09,997 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-01 01:10:09,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-01 01:10:09,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:09,998 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-10-01 01:10:09,998 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:09,998 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:09,999 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-10-01 01:10:09,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:09,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:10,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:10,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:10,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:10,217 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:10,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:10,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:10:10,240 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-01 01:10:10,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:10,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:10,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:10,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-01 01:10:10,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 01:10:10,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 01:10:10,308 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:10,308 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-01 01:10:10,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:10,416 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-01 01:10:10,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 01:10:10,417 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-01 01:10:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:10,418 INFO L225 Difference]: With dead ends: 10 [2018-10-01 01:10:10,418 INFO L226 Difference]: Without dead ends: 8 [2018-10-01 01:10:10,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:10:10,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-01 01:10:10,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-01 01:10:10,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-01 01:10:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-01 01:10:10,422 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-01 01:10:10,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:10,423 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-01 01:10:10,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 01:10:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-01 01:10:10,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-01 01:10:10,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:10,424 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-10-01 01:10:10,424 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:10,425 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:10,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-10-01 01:10:10,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:10,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:10,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:10,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:10,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:10,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:10,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:10,505 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:10:10,538 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:10:10,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:10,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:10,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:10,655 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 01:10:10,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 01:10:10,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 01:10:10,657 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:10,657 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-01 01:10:10,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:10,723 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-01 01:10:10,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 01:10:10,724 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-01 01:10:10,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:10,724 INFO L225 Difference]: With dead ends: 11 [2018-10-01 01:10:10,724 INFO L226 Difference]: Without dead ends: 9 [2018-10-01 01:10:10,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:10,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-01 01:10:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-01 01:10:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-01 01:10:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-01 01:10:10,728 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-01 01:10:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:10,728 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-01 01:10:10,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 01:10:10,729 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-01 01:10:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-01 01:10:10,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:10,729 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-10-01 01:10:10,730 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:10,730 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:10,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-10-01 01:10:10,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:10,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:10,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:10,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:10,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:10,823 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:10,824 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:10,832 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:10:10,849 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-01 01:10:10,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:10,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:10,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:10,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 01:10:10,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 01:10:10,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 01:10:10,934 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:10,935 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-01 01:10:11,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:11,324 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-01 01:10:11,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 01:10:11,325 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-01 01:10:11,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:11,326 INFO L225 Difference]: With dead ends: 12 [2018-10-01 01:10:11,326 INFO L226 Difference]: Without dead ends: 10 [2018-10-01 01:10:11,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:11,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-01 01:10:11,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-01 01:10:11,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-01 01:10:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-01 01:10:11,333 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-01 01:10:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:11,335 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-01 01:10:11,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 01:10:11,336 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-01 01:10:11,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-01 01:10:11,336 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:11,336 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-10-01 01:10:11,337 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:11,337 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:11,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-10-01 01:10:11,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:11,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:11,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:11,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:11,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:11,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:11,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:11,546 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:10:11,562 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-01 01:10:11,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:11,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:11,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:11,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 01:10:11,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 01:10:11,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 01:10:11,627 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:11,627 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-01 01:10:11,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:11,777 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-01 01:10:11,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 01:10:11,777 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-01 01:10:11,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:11,778 INFO L225 Difference]: With dead ends: 13 [2018-10-01 01:10:11,778 INFO L226 Difference]: Without dead ends: 11 [2018-10-01 01:10:11,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:11,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-01 01:10:11,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-01 01:10:11,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-01 01:10:11,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-01 01:10:11,781 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-01 01:10:11,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:11,781 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-01 01:10:11,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 01:10:11,781 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-01 01:10:11,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-01 01:10:11,782 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:11,782 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-10-01 01:10:11,783 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:11,783 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:11,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-10-01 01:10:11,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:11,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:11,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:11,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:11,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:11,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:11,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:11,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:11,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:12,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:12,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 01:10:12,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 01:10:12,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 01:10:12,062 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:12,062 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-01 01:10:12,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:12,161 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-01 01:10:12,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 01:10:12,162 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-01 01:10:12,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:12,162 INFO L225 Difference]: With dead ends: 14 [2018-10-01 01:10:12,162 INFO L226 Difference]: Without dead ends: 12 [2018-10-01 01:10:12,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:10:12,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-01 01:10:12,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-01 01:10:12,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-01 01:10:12,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-01 01:10:12,166 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-01 01:10:12,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:12,166 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-01 01:10:12,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 01:10:12,166 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-01 01:10:12,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 01:10:12,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:12,167 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-10-01 01:10:12,167 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:12,167 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:12,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-10-01 01:10:12,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:12,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:12,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:12,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:12,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:12,272 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:12,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:12,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:12,284 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:10:12,295 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:10:12,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:12,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:12,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:12,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 01:10:12,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 01:10:12,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 01:10:12,390 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:12,390 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-01 01:10:12,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:12,546 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-01 01:10:12,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 01:10:12,547 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-01 01:10:12,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:12,547 INFO L225 Difference]: With dead ends: 15 [2018-10-01 01:10:12,547 INFO L226 Difference]: Without dead ends: 13 [2018-10-01 01:10:12,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:12,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-01 01:10:12,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-01 01:10:12,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-01 01:10:12,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-01 01:10:12,551 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-01 01:10:12,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:12,551 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-01 01:10:12,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 01:10:12,552 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-01 01:10:12,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-01 01:10:12,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:12,552 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-10-01 01:10:12,552 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:12,553 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:12,553 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-10-01 01:10:12,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:12,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:12,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:12,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:12,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:12,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:12,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:12,729 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:10:13,046 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-01 01:10:13,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:13,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:13,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:13,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 01:10:13,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 01:10:13,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 01:10:13,117 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:13,117 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-01 01:10:13,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:13,198 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-01 01:10:13,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 01:10:13,199 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-01 01:10:13,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:13,200 INFO L225 Difference]: With dead ends: 16 [2018-10-01 01:10:13,200 INFO L226 Difference]: Without dead ends: 14 [2018-10-01 01:10:13,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:13,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-01 01:10:13,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-01 01:10:13,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-01 01:10:13,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-01 01:10:13,204 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-01 01:10:13,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:13,205 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-01 01:10:13,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 01:10:13,205 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-01 01:10:13,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 01:10:13,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:13,206 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-10-01 01:10:13,206 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:13,206 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:13,206 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-10-01 01:10:13,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:13,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:13,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:13,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:13,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:13,316 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:13,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:13,325 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:10:13,339 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:10:13,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:13,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:13,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:13,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-01 01:10:13,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-01 01:10:13,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-01 01:10:13,415 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:13,415 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-01 01:10:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:13,505 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-01 01:10:13,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-01 01:10:13,506 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-01 01:10:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:13,507 INFO L225 Difference]: With dead ends: 17 [2018-10-01 01:10:13,507 INFO L226 Difference]: Without dead ends: 15 [2018-10-01 01:10:13,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:13,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-01 01:10:13,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-01 01:10:13,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-01 01:10:13,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-01 01:10:13,511 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-01 01:10:13,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:13,511 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-01 01:10:13,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-01 01:10:13,511 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-01 01:10:13,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-01 01:10:13,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:13,512 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-10-01 01:10:13,512 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:13,512 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:13,513 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-10-01 01:10:13,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:13,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:13,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:13,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:13,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:13,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:13,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:13,647 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:10:16,121 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-01 01:10:16,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:16,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:16,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:16,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-01 01:10:16,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-01 01:10:16,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-01 01:10:16,233 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:16,233 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-01 01:10:16,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:16,326 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-01 01:10:16,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-01 01:10:16,327 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-01 01:10:16,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:16,328 INFO L225 Difference]: With dead ends: 18 [2018-10-01 01:10:16,328 INFO L226 Difference]: Without dead ends: 16 [2018-10-01 01:10:16,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:16,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-01 01:10:16,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-01 01:10:16,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-01 01:10:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-01 01:10:16,332 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-01 01:10:16,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:16,332 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-01 01:10:16,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-01 01:10:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-01 01:10:16,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 01:10:16,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:16,333 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-10-01 01:10:16,334 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:16,334 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:16,334 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-10-01 01:10:16,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:16,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:16,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:16,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:16,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:16,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:16,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:16,577 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:10:16,615 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 01:10:16,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:16,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:16,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:16,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-01 01:10:16,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-01 01:10:16,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-01 01:10:16,711 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:16,711 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-01 01:10:16,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:16,873 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-01 01:10:16,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-01 01:10:16,873 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-01 01:10:16,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:16,874 INFO L225 Difference]: With dead ends: 19 [2018-10-01 01:10:16,875 INFO L226 Difference]: Without dead ends: 17 [2018-10-01 01:10:16,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:10:16,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-01 01:10:16,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-01 01:10:16,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-01 01:10:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-01 01:10:16,880 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-01 01:10:16,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:16,880 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-01 01:10:16,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-01 01:10:16,881 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-01 01:10:16,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-01 01:10:16,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:16,881 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-10-01 01:10:16,881 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:16,882 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:16,882 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-10-01 01:10:16,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:16,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:16,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:16,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:16,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:17,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:17,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:17,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:17,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:17,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:17,113 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-01 01:10:17,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-01 01:10:17,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-01 01:10:17,114 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:17,114 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-01 01:10:17,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:17,380 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-01 01:10:17,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-01 01:10:17,382 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-01 01:10:17,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:17,383 INFO L225 Difference]: With dead ends: 20 [2018-10-01 01:10:17,383 INFO L226 Difference]: Without dead ends: 18 [2018-10-01 01:10:17,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:10:17,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-01 01:10:17,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-01 01:10:17,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 01:10:17,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-01 01:10:17,387 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-01 01:10:17,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:17,387 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-01 01:10:17,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-01 01:10:17,388 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-01 01:10:17,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 01:10:17,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:17,388 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-10-01 01:10:17,388 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:17,389 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:17,389 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-10-01 01:10:17,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:17,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:17,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:17,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:10:17,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:17,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:17,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:17,618 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:10:17,634 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:10:17,634 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:17,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:17,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:17,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-01 01:10:17,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-01 01:10:17,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-01 01:10:17,719 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:17,719 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-01 01:10:17,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:17,829 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-01 01:10:17,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-01 01:10:17,829 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-01 01:10:17,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:17,830 INFO L225 Difference]: With dead ends: 21 [2018-10-01 01:10:17,830 INFO L226 Difference]: Without dead ends: 19 [2018-10-01 01:10:17,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:10:17,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-01 01:10:17,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-01 01:10:17,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-01 01:10:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-01 01:10:17,834 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-01 01:10:17,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:17,834 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-01 01:10:17,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-01 01:10:17,835 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-01 01:10:17,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-01 01:10:17,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:17,835 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-10-01 01:10:17,836 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:17,836 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:17,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-10-01 01:10:17,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:17,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:17,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:17,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:17,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:18,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:18,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:18,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:10:20,323 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 01:10:20,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:20,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:20,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:20,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-01 01:10:20,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-01 01:10:20,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-01 01:10:20,485 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:20,486 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-01 01:10:20,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:20,639 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-01 01:10:20,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-01 01:10:20,640 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-01 01:10:20,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:20,641 INFO L225 Difference]: With dead ends: 22 [2018-10-01 01:10:20,641 INFO L226 Difference]: Without dead ends: 20 [2018-10-01 01:10:20,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:10:20,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-01 01:10:20,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-01 01:10:20,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 01:10:20,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-01 01:10:20,646 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-01 01:10:20,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:20,646 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-01 01:10:20,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-01 01:10:20,646 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-01 01:10:20,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 01:10:20,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:20,647 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-10-01 01:10:20,647 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:20,647 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:20,648 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-10-01 01:10:20,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:20,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:20,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:20,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:20,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:21,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:21,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:21,180 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:10:21,194 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:10:21,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:10:21,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:10:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:21,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:10:21,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-01 01:10:21,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-01 01:10:21,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-01 01:10:21,274 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:10:21,274 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-01 01:10:21,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:10:21,581 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-01 01:10:21,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-01 01:10:21,582 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-01 01:10:21,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:10:21,583 INFO L225 Difference]: With dead ends: 23 [2018-10-01 01:10:21,583 INFO L226 Difference]: Without dead ends: 21 [2018-10-01 01:10:21,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:10:21,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-01 01:10:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-01 01:10:21,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-01 01:10:21,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-01 01:10:21,588 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-01 01:10:21,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:10:21,588 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-01 01:10:21,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-01 01:10:21,588 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-01 01:10:21,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-01 01:10:21,589 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:10:21,589 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-10-01 01:10:21,590 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:10:21,590 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:10:21,590 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-10-01 01:10:21,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:10:21,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:10:21,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:21,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:10:21,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:10:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:10:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:10:21,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:10:21,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:10:21,864 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:11:10,719 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 01:11:10,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:10,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:10,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:10,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-01 01:11:10,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-01 01:11:10,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-01 01:11:10,942 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:10,942 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-01 01:11:11,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:11,072 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-01 01:11:11,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-01 01:11:11,072 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-01 01:11:11,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:11,073 INFO L225 Difference]: With dead ends: 24 [2018-10-01 01:11:11,074 INFO L226 Difference]: Without dead ends: 22 [2018-10-01 01:11:11,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:11:11,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-01 01:11:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-01 01:11:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 01:11:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-01 01:11:11,078 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-01 01:11:11,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:11,078 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-01 01:11:11,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-01 01:11:11,079 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-01 01:11:11,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 01:11:11,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:11,079 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-10-01 01:11:11,080 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:11,080 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:11,080 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-10-01 01:11:11,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:11,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:11,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:11,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:11,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:11,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:11,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:11,229 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:11:13,159 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 01:11:13,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:13,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:13,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:13,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-01 01:11:13,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-01 01:11:13,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-01 01:11:13,263 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:13,263 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-01 01:11:13,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:13,418 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-01 01:11:13,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-01 01:11:13,419 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-01 01:11:13,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:13,420 INFO L225 Difference]: With dead ends: 25 [2018-10-01 01:11:13,420 INFO L226 Difference]: Without dead ends: 23 [2018-10-01 01:11:13,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 01:11:13,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-01 01:11:13,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-01 01:11:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-01 01:11:13,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-01 01:11:13,425 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-01 01:11:13,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:13,425 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-01 01:11:13,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-01 01:11:13,426 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-01 01:11:13,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-01 01:11:13,426 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:13,426 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-10-01 01:11:13,427 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:13,427 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:13,427 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-10-01 01:11:13,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:13,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:13,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:13,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:13,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:13,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:13,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:13,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:13,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:13,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:13,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-01 01:11:13,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-01 01:11:13,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-01 01:11:13,834 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:13,834 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-01 01:11:14,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:14,089 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-01 01:11:14,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-01 01:11:14,090 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-01 01:11:14,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:14,090 INFO L225 Difference]: With dead ends: 26 [2018-10-01 01:11:14,091 INFO L226 Difference]: Without dead ends: 24 [2018-10-01 01:11:14,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:11:14,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-01 01:11:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-01 01:11:14,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 01:11:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-01 01:11:14,095 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-01 01:11:14,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:14,095 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-01 01:11:14,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-01 01:11:14,095 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-01 01:11:14,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-01 01:11:14,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:14,096 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-10-01 01:11:14,096 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:14,097 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:14,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-10-01 01:11:14,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:14,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:14,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:14,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:11:14,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:14,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:14,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:14,430 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:11:14,444 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:11:14,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:14,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:14,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:14,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-01 01:11:14,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-01 01:11:14,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-01 01:11:14,515 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:14,515 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-01 01:11:14,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:14,664 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-01 01:11:14,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-01 01:11:14,666 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-01 01:11:14,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:14,666 INFO L225 Difference]: With dead ends: 27 [2018-10-01 01:11:14,667 INFO L226 Difference]: Without dead ends: 25 [2018-10-01 01:11:14,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:11:14,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-01 01:11:14,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-01 01:11:14,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-01 01:11:14,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-01 01:11:14,670 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-01 01:11:14,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:14,670 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-01 01:11:14,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-01 01:11:14,670 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-01 01:11:14,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-01 01:11:14,671 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:14,671 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-10-01 01:11:14,671 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:14,671 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:14,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-10-01 01:11:14,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:14,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:14,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:14,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:14,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:14,838 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:14,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:14,846 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:11:44,992 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-01 01:11:44,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:45,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:45,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:45,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-01 01:11:45,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-01 01:11:45,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-01 01:11:45,259 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:45,259 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-01 01:11:45,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:45,614 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-01 01:11:45,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-01 01:11:45,616 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-01 01:11:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:45,616 INFO L225 Difference]: With dead ends: 28 [2018-10-01 01:11:45,617 INFO L226 Difference]: Without dead ends: 26 [2018-10-01 01:11:45,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:11:45,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-01 01:11:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-01 01:11:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 01:11:45,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-01 01:11:45,620 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-01 01:11:45,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:45,621 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-01 01:11:45,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-01 01:11:45,621 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-01 01:11:45,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-01 01:11:45,621 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:45,622 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-10-01 01:11:45,622 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:45,622 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:45,622 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-10-01 01:11:45,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:45,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:45,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:45,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:45,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:45,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:45,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:45,838 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:11:45,858 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:11:45,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:11:45,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:11:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:46,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:11:46,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-01 01:11:46,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-01 01:11:46,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-01 01:11:46,017 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:11:46,017 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-01 01:11:46,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:11:46,239 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-01 01:11:46,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-01 01:11:46,240 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-01 01:11:46,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:11:46,240 INFO L225 Difference]: With dead ends: 29 [2018-10-01 01:11:46,241 INFO L226 Difference]: Without dead ends: 27 [2018-10-01 01:11:46,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:11:46,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-01 01:11:46,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-01 01:11:46,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-01 01:11:46,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-01 01:11:46,246 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-01 01:11:46,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:11:46,246 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-01 01:11:46,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-01 01:11:46,247 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-01 01:11:46,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-01 01:11:46,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:11:46,248 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-10-01 01:11:46,248 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:11:46,248 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:11:46,248 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-10-01 01:11:46,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:11:46,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:11:46,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:46,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:11:46,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:11:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:11:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:11:46,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:11:46,386 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:11:46,394 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:13:05,137 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-01 01:13:05,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:05,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:05,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:05,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-01 01:13:05,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-01 01:13:05,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-01 01:13:05,579 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:05,579 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-01 01:13:05,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:05,767 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-01 01:13:05,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-01 01:13:05,767 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-01 01:13:05,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:05,768 INFO L225 Difference]: With dead ends: 30 [2018-10-01 01:13:05,768 INFO L226 Difference]: Without dead ends: 28 [2018-10-01 01:13:05,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:13:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-01 01:13:05,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-01 01:13:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 01:13:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-01 01:13:05,772 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-01 01:13:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:05,773 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-01 01:13:05,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-01 01:13:05,773 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-01 01:13:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-01 01:13:05,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:05,774 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-10-01 01:13:05,774 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:05,774 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:05,774 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-10-01 01:13:05,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:05,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:05,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:05,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:05,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:06,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:06,121 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:06,128 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:13:14,075 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-01 01:13:14,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:14,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:14,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:14,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-01 01:13:14,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-01 01:13:14,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-01 01:13:14,213 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:14,213 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-01 01:13:14,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:14,392 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-01 01:13:14,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-01 01:13:14,393 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-01 01:13:14,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:14,394 INFO L225 Difference]: With dead ends: 31 [2018-10-01 01:13:14,394 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 01:13:14,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:13:14,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 01:13:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-01 01:13:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-01 01:13:14,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-01 01:13:14,398 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-01 01:13:14,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:14,398 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-01 01:13:14,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-01 01:13:14,399 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-01 01:13:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-01 01:13:14,399 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:14,400 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-10-01 01:13:14,400 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:14,400 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:14,400 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-10-01 01:13:14,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:14,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:14,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:14,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:14,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:14,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:14,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:14,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:14,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:14,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:14,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-01 01:13:14,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-01 01:13:14,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-01 01:13:14,702 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:14,702 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-01 01:13:14,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:14,859 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-01 01:13:14,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-01 01:13:14,861 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-01 01:13:14,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:14,862 INFO L225 Difference]: With dead ends: 32 [2018-10-01 01:13:14,862 INFO L226 Difference]: Without dead ends: 30 [2018-10-01 01:13:14,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:13:14,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-01 01:13:14,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-01 01:13:14,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 01:13:14,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-01 01:13:14,865 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-01 01:13:14,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:14,865 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-01 01:13:14,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-01 01:13:14,865 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-01 01:13:14,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-01 01:13:14,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:14,866 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-10-01 01:13:14,866 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:14,866 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:14,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-10-01 01:13:14,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:14,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:14,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:14,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:13:14,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:15,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:15,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:15,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:13:15,716 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:13:15,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:13:15,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:13:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:15,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:13:15,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-01 01:13:15,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-01 01:13:15,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-01 01:13:15,805 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:13:15,805 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-01 01:13:16,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:13:16,070 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-01 01:13:16,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-01 01:13:16,071 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-01 01:13:16,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:13:16,071 INFO L225 Difference]: With dead ends: 33 [2018-10-01 01:13:16,071 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 01:13:16,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 01:13:16,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 01:13:16,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-01 01:13:16,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-01 01:13:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-01 01:13:16,075 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-01 01:13:16,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:13:16,076 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-01 01:13:16,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-01 01:13:16,076 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-01 01:13:16,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-01 01:13:16,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:13:16,077 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-10-01 01:13:16,077 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:13:16,077 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:13:16,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-10-01 01:13:16,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:13:16,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:13:16,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:16,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:13:16,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:13:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:13:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:13:17,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:13:17,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:13:17,032 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:14:03,814 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-01 01:14:03,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:03,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:03,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:03,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-01 01:14:03,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-01 01:14:03,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-01 01:14:03,955 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:03,955 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-01 01:14:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:04,090 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-01 01:14:04,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-01 01:14:04,090 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-01 01:14:04,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:04,091 INFO L225 Difference]: With dead ends: 34 [2018-10-01 01:14:04,091 INFO L226 Difference]: Without dead ends: 32 [2018-10-01 01:14:04,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-10-01 01:14:04,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-01 01:14:04,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-01 01:14:04,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 01:14:04,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-01 01:14:04,096 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-01 01:14:04,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:04,096 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-01 01:14:04,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-01 01:14:04,096 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-01 01:14:04,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-01 01:14:04,097 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:04,097 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-10-01 01:14:04,097 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:04,097 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:04,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-10-01 01:14:04,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:04,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:04,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:04,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:04,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:05,271 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:05,271 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:05,285 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:14:05,305 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:14:05,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:14:05,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:14:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:05,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:14:05,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-01 01:14:05,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-01 01:14:05,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-01 01:14:05,447 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:14:05,447 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-01 01:14:05,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:14:05,630 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-01 01:14:05,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-01 01:14:05,631 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-01 01:14:05,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:14:05,631 INFO L225 Difference]: With dead ends: 35 [2018-10-01 01:14:05,632 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 01:14:05,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-10-01 01:14:05,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 01:14:05,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-01 01:14:05,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-01 01:14:05,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-01 01:14:05,635 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-01 01:14:05,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:14:05,635 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-01 01:14:05,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-01 01:14:05,636 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-01 01:14:05,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-01 01:14:05,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:14:05,636 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-10-01 01:14:05,636 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:14:05,637 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:14:05,637 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-10-01 01:14:05,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:14:05,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:14:05,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:05,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:14:05,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:14:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:14:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:14:05,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:14:05,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:14:05,950 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:16:21,128 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-01 01:16:21,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:16:21,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:16:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:21,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:16:21,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-01 01:16:21,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-01 01:16:21,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-01 01:16:21,350 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:16:21,350 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-01 01:16:21,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:16:21,553 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-01 01:16:21,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-01 01:16:21,554 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-01 01:16:21,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:16:21,554 INFO L225 Difference]: With dead ends: 36 [2018-10-01 01:16:21,555 INFO L226 Difference]: Without dead ends: 34 [2018-10-01 01:16:21,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:16:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-01 01:16:21,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-01 01:16:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 01:16:21,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-01 01:16:21,558 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-01 01:16:21,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:16:21,558 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-01 01:16:21,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-01 01:16:21,559 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-01 01:16:21,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-01 01:16:21,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:16:21,559 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-10-01 01:16:21,559 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:16:21,560 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:16:21,560 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times [2018-10-01 01:16:21,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:16:21,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:16:21,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:21,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:16:21,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:16:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:16:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:16:21,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:16:21,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:16:21,840 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:17:40,941 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-01 01:17:40,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:40,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:41,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:41,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-01 01:17:41,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-01 01:17:41,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-01 01:17:41,098 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:41,098 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-01 01:17:41,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:41,291 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-01 01:17:41,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-01 01:17:41,292 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-01 01:17:41,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:41,292 INFO L225 Difference]: With dead ends: 37 [2018-10-01 01:17:41,293 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 01:17:41,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:17:41,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 01:17:41,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-01 01:17:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-01 01:17:41,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-01 01:17:41,296 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-01 01:17:41,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:41,297 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-01 01:17:41,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-01 01:17:41,297 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-01 01:17:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-01 01:17:41,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:41,298 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-10-01 01:17:41,298 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:41,298 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:41,298 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times [2018-10-01 01:17:41,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:41,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:41,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:41,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:41,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:41,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:41,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:41,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:17:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:41,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:41,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:41,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-01 01:17:41,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-01 01:17:41,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-01 01:17:41,617 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:41,617 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-01 01:17:42,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:42,029 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-01 01:17:42,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-01 01:17:42,030 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-01 01:17:42,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:42,030 INFO L225 Difference]: With dead ends: 38 [2018-10-01 01:17:42,030 INFO L226 Difference]: Without dead ends: 36 [2018-10-01 01:17:42,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:17:42,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-01 01:17:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-01 01:17:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 01:17:42,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-01 01:17:42,036 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-01 01:17:42,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:42,036 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-01 01:17:42,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-01 01:17:42,036 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-01 01:17:42,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-01 01:17:42,037 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:42,037 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-10-01 01:17:42,037 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:42,037 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:42,037 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times [2018-10-01 01:17:42,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:42,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:42,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:42,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:17:42,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:42,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:42,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:42,316 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:17:42,340 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:17:42,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:17:42,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:17:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:42,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:17:42,435 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-01 01:17:42,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-01 01:17:42,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-01 01:17:42,436 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:17:42,436 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-01 01:17:42,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:17:42,597 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-01 01:17:42,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-01 01:17:42,597 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-01 01:17:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:17:42,598 INFO L225 Difference]: With dead ends: 39 [2018-10-01 01:17:42,598 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 01:17:42,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:17:42,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 01:17:42,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-01 01:17:42,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-01 01:17:42,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-01 01:17:42,601 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-01 01:17:42,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:17:42,601 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-01 01:17:42,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-01 01:17:42,602 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-01 01:17:42,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-01 01:17:42,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:17:42,602 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-10-01 01:17:42,602 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:17:42,603 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:17:42,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times [2018-10-01 01:17:42,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:17:42,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:17:42,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:42,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:17:42,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:17:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:17:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:17:42,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:17:42,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:17:42,863 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:19:44,543 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-01 01:19:44,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:44,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:44,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:44,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-01 01:19:44,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-01 01:19:44,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-01 01:19:44,852 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:44,852 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-01 01:19:45,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:45,054 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-01 01:19:45,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-01 01:19:45,054 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-01 01:19:45,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:45,055 INFO L225 Difference]: With dead ends: 40 [2018-10-01 01:19:45,055 INFO L226 Difference]: Without dead ends: 38 [2018-10-01 01:19:45,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:19:45,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-01 01:19:45,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-01 01:19:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 01:19:45,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-01 01:19:45,058 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-01 01:19:45,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:45,058 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-01 01:19:45,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-01 01:19:45,058 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-01 01:19:45,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-01 01:19:45,059 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:45,059 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-10-01 01:19:45,059 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:45,059 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:45,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times [2018-10-01 01:19:45,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:45,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:45,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:45,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:45,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:45,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:45,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:45,323 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:19:45,347 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:19:45,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:19:45,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:19:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:45,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:19:45,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-01 01:19:45,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-01 01:19:45,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-01 01:19:45,566 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:19:45,566 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-01 01:19:45,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:19:45,750 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-01 01:19:45,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-01 01:19:45,751 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-01 01:19:45,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:19:45,751 INFO L225 Difference]: With dead ends: 41 [2018-10-01 01:19:45,751 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 01:19:45,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:19:45,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 01:19:45,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-01 01:19:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-01 01:19:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-01 01:19:45,755 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-01 01:19:45,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:19:45,755 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-01 01:19:45,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-01 01:19:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-01 01:19:45,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-01 01:19:45,756 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:19:45,756 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-10-01 01:19:45,756 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:19:45,757 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:19:45,757 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times [2018-10-01 01:19:45,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:19:45,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:19:45,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:45,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:19:45,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:19:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:19:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:19:45,960 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:19:45,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:19:45,967 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:22:22,115 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-01 01:22:22,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:22:22,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:22:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:23,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:22:23,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-01 01:22:23,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-01 01:22:23,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-01 01:22:23,490 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:22:23,490 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-01 01:22:23,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:22:23,725 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-01 01:22:23,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-01 01:22:23,725 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-01 01:22:23,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:22:23,726 INFO L225 Difference]: With dead ends: 42 [2018-10-01 01:22:23,726 INFO L226 Difference]: Without dead ends: 40 [2018-10-01 01:22:23,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 01:22:23,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-01 01:22:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-01 01:22:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-01 01:22:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-01 01:22:23,728 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-01 01:22:23,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:22:23,728 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-01 01:22:23,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-01 01:22:23,728 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-01 01:22:23,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-01 01:22:23,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:22:23,729 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-10-01 01:22:23,729 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:22:23,729 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:22:23,729 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times [2018-10-01 01:22:23,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:22:23,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:22:23,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:23,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:22:23,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:22:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:22:23,993 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:22:23,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:22:23,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:22:24,004 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:24:03,941 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-01 01:24:03,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:24:04,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:24:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:24:04,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:24:04,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-01 01:24:04,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-01 01:24:04,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-01 01:24:04,292 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:24:04,293 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-01 01:24:04,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:24:04,515 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-01 01:24:04,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-01 01:24:04,516 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-01 01:24:04,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:24:04,517 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:24:04,517 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:24:04,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:24:04,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:24:04,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-01 01:24:04,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-01 01:24:04,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-01 01:24:04,519 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-01 01:24:04,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:24:04,519 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-01 01:24:04,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-01 01:24:04,519 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-01 01:24:04,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-01 01:24:04,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:24:04,520 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-10-01 01:24:04,520 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:24:04,520 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:24:04,520 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times [2018-10-01 01:24:04,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:24:04,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:24:04,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:24:04,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:24:04,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:24:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:24:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:24:04,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:24:04,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:24:04,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:24:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:24:04,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:24:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:24:04,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:24:04,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-01 01:24:04,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-01 01:24:04,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-01 01:24:04,953 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:24:04,953 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-01 01:24:05,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:24:05,204 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-01 01:24:05,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-01 01:24:05,214 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-01 01:24:05,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:24:05,214 INFO L225 Difference]: With dead ends: 44 [2018-10-01 01:24:05,214 INFO L226 Difference]: Without dead ends: 42 [2018-10-01 01:24:05,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 01:24:05,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-01 01:24:05,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-01 01:24:05,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-01 01:24:05,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-01 01:24:05,216 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-01 01:24:05,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:24:05,216 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-01 01:24:05,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-01 01:24:05,216 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-01 01:24:05,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-01 01:24:05,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:24:05,217 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-10-01 01:24:05,217 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:24:05,217 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:24:05,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times [2018-10-01 01:24:05,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:24:05,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:24:05,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:24:05,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:24:05,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:24:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:24:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:24:05,430 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:24:05,430 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:24:05,437 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:24:05,465 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:24:05,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:24:05,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:24:05,565 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:24:05,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:24:05,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-01 01:24:05,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-01 01:24:05,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-01 01:24:05,586 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:24:05,586 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-01 01:24:05,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:24:05,756 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-01 01:24:05,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-01 01:24:05,756 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-01 01:24:05,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:24:05,757 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:24:05,757 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:24:05,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 01:24:05,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:24:05,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-01 01:24:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-01 01:24:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-01 01:24:05,760 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-01 01:24:05,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:24:05,760 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-01 01:24:05,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-01 01:24:05,760 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-01 01:24:05,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-01 01:24:05,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:24:05,761 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-10-01 01:24:05,761 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:24:05,761 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:24:05,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times [2018-10-01 01:24:05,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:24:05,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:24:05,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:24:05,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:24:05,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:24:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:24:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:24:06,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:24:06,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:24:06,087 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown