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/HiddenEquality-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:38:49,381 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:38:49,383 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:38:49,397 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:38:49,398 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:38:49,399 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:38:49,400 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:38:49,402 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:38:49,403 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:38:49,405 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:38:49,408 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-28 10:38:49,408 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-28 10:38:49,410 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-28 10:38:49,412 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-28 10:38:49,413 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-28 10:38:49,420 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-28 10:38:49,421 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-28 10:38:49,423 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-28 10:38:49,428 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-28 10:38:49,432 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-28 10:38:49,433 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-28 10:38:49,436 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-28 10:38:49,439 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-28 10:38:49,457 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-28 10:38:49,478 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:38:49,479 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:38:49,480 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:38:49,480 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:38:49,481 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:38:49,481 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:38:49,481 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:38:49,481 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:38:49,482 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:38:49,482 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:38:49,482 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:38:49,483 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:38:49,483 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:38:49,483 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:38:49,483 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:38:49,483 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:38:49,484 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:38:49,484 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:38:49,484 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:38:49,484 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:38:49,484 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:38:49,485 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:38:49,486 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:38:49,486 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:38:49,486 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:38:49,486 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:38:49,487 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:38:49,487 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:38:49,487 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:38:49,487 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:38:49,487 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-28 10:38:49,539 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:38:49,553 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:38:49,561 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:38:49,562 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:38:49,563 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:38:49,564 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEquality-Safe.bpl [2018-09-28 10:38:49,564 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEquality-Safe.bpl' [2018-09-28 10:38:49,613 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:38:49,616 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:38:49,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:38:49,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:38:49,619 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:38:49,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:49" (1/1) ... [2018-09-28 10:38:49,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:49" (1/1) ... [2018-09-28 10:38:49,657 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-28 10:38:49,658 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-28 10:38:49,658 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-28 10:38:49,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:38:49,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:38:49,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:38:49,661 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:38:49,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:49" (1/1) ... [2018-09-28 10:38:49,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:49" (1/1) ... [2018-09-28 10:38:49,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:49" (1/1) ... [2018-09-28 10:38:49,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:49" (1/1) ... [2018-09-28 10:38:49,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:49" (1/1) ... [2018-09-28 10:38:49,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:49" (1/1) ... [2018-09-28 10:38:49,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:49" (1/1) ... [2018-09-28 10:38:49,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:38:49,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:38:49,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:38:49,688 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:38:49,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:38:49,768 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-28 10:38:49,769 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-28 10:38:49,770 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-28 10:38:49,974 INFO L350 CfgBuilder]: Using library mode [2018-09-28 10:38:49,975 INFO L202 PluginConnector]: Adding new model HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:38:49 BoogieIcfgContainer [2018-09-28 10:38:49,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:38:49,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:38:49,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:38:49,980 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:38:49,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:38:49" (1/2) ... [2018-09-28 10:38:49,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7207c910 and model type HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:38:49, skipping insertion in model container [2018-09-28 10:38:49,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:38:49" (2/2) ... [2018-09-28 10:38:49,984 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEquality-Safe.bpl [2018-09-28 10:38:49,994 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:38:50,006 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:38:50,059 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:38:50,060 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:38:50,060 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:38:50,060 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:38:50,061 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:38:50,061 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:38:50,061 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:38:50,061 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:38:50,061 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:38:50,077 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-28 10:38:50,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-28 10:38:50,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:50,085 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-28 10:38:50,086 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:50,094 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:50,095 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-28 10:38:50,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:50,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:50,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:50,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:50,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:50,241 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:38:50,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-28 10:38:50,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:38:50,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:38:50,258 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:50,261 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-28 10:38:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:50,450 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-28 10:38:50,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:38:50,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-28 10:38:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:50,463 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:38:50,464 INFO L226 Difference]: Without dead ends: 4 [2018-09-28 10:38:50,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:50,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-28 10:38:50,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-28 10:38:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-28 10:38:50,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-28 10:38:50,500 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-28 10:38:50,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:50,500 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-28 10:38:50,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:38:50,500 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-28 10:38:50,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-28 10:38:50,501 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:50,501 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-28 10:38:50,501 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:50,502 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:50,502 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-28 10:38:50,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:50,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:50,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:50,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:50,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:50,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:50,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:50,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:50,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:50,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:50,689 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-28 10:38:50,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:38:50,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:38:50,690 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:50,690 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 4 states. [2018-09-28 10:38:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:50,765 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-28 10:38:50,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:38:50,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-09-28 10:38:50,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:50,766 INFO L225 Difference]: With dead ends: 6 [2018-09-28 10:38:50,766 INFO L226 Difference]: Without dead ends: 5 [2018-09-28 10:38:50,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-28 10:38:50,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-28 10:38:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-28 10:38:50,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-28 10:38:50,769 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-28 10:38:50,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:50,770 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-28 10:38:50,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:38:50,770 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-28 10:38:50,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-28 10:38:50,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:50,771 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-28 10:38:50,771 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:50,771 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:50,772 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-28 10:38:50,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:50,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:50,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:50,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:50,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:50,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:50,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:50,845 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:38:50,854 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:38:50,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:50,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:50,898 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:50,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 10:38:50,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:38:50,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:38:50,899 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:50,899 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-28 10:38:51,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:51,066 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-28 10:38:51,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:38:51,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-28 10:38:51,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:51,067 INFO L225 Difference]: With dead ends: 7 [2018-09-28 10:38:51,067 INFO L226 Difference]: Without dead ends: 6 [2018-09-28 10:38:51,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:51,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-28 10:38:51,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-28 10:38:51,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-28 10:38:51,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-28 10:38:51,070 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-28 10:38:51,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:51,071 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-28 10:38:51,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:38:51,071 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-28 10:38:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:38:51,071 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:51,072 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-28 10:38:51,072 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:51,072 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:51,072 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-28 10:38:51,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:51,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:51,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:51,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:51,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:51,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:51,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:51,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:38:51,280 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-28 10:38:51,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:51,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:51,333 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:51,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:38:51,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:38:51,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:38:51,334 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:51,335 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-28 10:38:51,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:51,446 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-28 10:38:51,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:38:51,446 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-28 10:38:51,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:51,447 INFO L225 Difference]: With dead ends: 8 [2018-09-28 10:38:51,447 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 10:38:51,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:51,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 10:38:51,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-28 10:38:51,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-28 10:38:51,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-28 10:38:51,451 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-28 10:38:51,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:51,451 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-28 10:38:51,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:38:51,452 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-28 10:38:51,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-28 10:38:51,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:51,452 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-28 10:38:51,453 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:51,453 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:51,453 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-28 10:38:51,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:51,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:51,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:51,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:51,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:51,535 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:51,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:51,545 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:38:51,552 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:38:51,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:51,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:51,691 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:51,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:38:51,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:38:51,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:38:51,692 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:51,692 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-28 10:38:51,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:51,759 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-28 10:38:51,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:38:51,759 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-28 10:38:51,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:51,760 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:38:51,761 INFO L226 Difference]: Without dead ends: 8 [2018-09-28 10:38:51,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:51,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-28 10:38:51,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-28 10:38:51,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:38:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-28 10:38:51,766 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-28 10:38:51,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:51,767 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-28 10:38:51,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:38:51,767 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-28 10:38:51,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:38:51,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:51,768 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-28 10:38:51,768 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:51,768 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:51,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-28 10:38:51,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:51,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:51,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:51,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:51,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:51,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:51,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:51,853 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:38:51,863 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-28 10:38:51,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:51,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:51,917 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:51,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:38:51,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:38:51,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:38:51,918 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:51,919 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-28 10:38:52,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:52,140 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-28 10:38:52,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:38:52,142 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-28 10:38:52,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:52,143 INFO L225 Difference]: With dead ends: 10 [2018-09-28 10:38:52,143 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 10:38:52,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:52,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 10:38:52,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-28 10:38:52,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-28 10:38:52,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-28 10:38:52,152 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-28 10:38:52,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:52,153 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-28 10:38:52,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:38:52,153 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-28 10:38:52,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:38:52,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:52,155 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-28 10:38:52,155 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:52,156 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:52,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-28 10:38:52,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:52,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:52,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:52,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:52,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:52,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:52,522 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:52,532 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:38:52,567 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-28 10:38:52,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:52,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:52,625 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:52,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:52,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:38:52,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:38:52,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:38:52,647 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:52,647 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-28 10:38:52,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:52,774 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:38:52,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:38:52,774 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-28 10:38:52,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:52,775 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:38:52,775 INFO L226 Difference]: Without dead ends: 10 [2018-09-28 10:38:52,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:52,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-28 10:38:52,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-28 10:38:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:38:52,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-28 10:38:52,779 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-28 10:38:52,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:52,779 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-28 10:38:52,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:38:52,780 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-28 10:38:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:38:52,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:52,780 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-28 10:38:52,781 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:52,781 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:52,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-28 10:38:52,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:52,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:52,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:52,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:52,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:52,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:52,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:52,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:52,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:52,963 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:52,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:38:52,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:38:52,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:38:52,964 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:52,964 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-28 10:38:53,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:53,051 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-28 10:38:53,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:38:53,051 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-28 10:38:53,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:53,052 INFO L225 Difference]: With dead ends: 12 [2018-09-28 10:38:53,052 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 10:38:53,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:53,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 10:38:53,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-28 10:38:53,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 10:38:53,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-28 10:38:53,056 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-28 10:38:53,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:53,056 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-28 10:38:53,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:38:53,056 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-28 10:38:53,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 10:38:53,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:53,057 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-28 10:38:53,057 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:53,058 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:53,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-28 10:38:53,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:53,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:53,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:53,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:53,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:53,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:53,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:53,177 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:38:53,187 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:38:53,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:53,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:53,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:53,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:38:53,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:38:53,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:38:53,257 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:53,258 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-28 10:38:53,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:53,543 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-28 10:38:53,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:38:53,545 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-28 10:38:53,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:53,546 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:38:53,546 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 10:38:53,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:53,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 10:38:53,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-28 10:38:53,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:38:53,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-28 10:38:53,549 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-28 10:38:53,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:53,550 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-28 10:38:53,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:38:53,550 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-28 10:38:53,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:38:53,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:53,550 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-28 10:38:53,551 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:53,551 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:53,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-28 10:38:53,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:53,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:53,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:53,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:53,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:53,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:53,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:53,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:38:53,694 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:38:53,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:53,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:53,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:53,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:38:53,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:38:53,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:38:53,792 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:53,792 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-28 10:38:53,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:53,910 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-28 10:38:53,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:38:53,911 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-28 10:38:53,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:53,912 INFO L225 Difference]: With dead ends: 14 [2018-09-28 10:38:53,912 INFO L226 Difference]: Without dead ends: 13 [2018-09-28 10:38:53,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:53,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-28 10:38:53,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-28 10:38:53,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-28 10:38:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-28 10:38:53,917 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-28 10:38:53,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:53,917 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-28 10:38:53,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:38:53,917 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-28 10:38:53,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 10:38:53,918 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:53,918 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-28 10:38:53,918 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:53,919 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:53,919 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-28 10:38:53,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:53,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:53,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:53,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:53,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:54,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:54,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:54,025 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:38:54,034 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:38:54,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:54,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:54,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:54,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-28 10:38:54,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 10:38:54,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 10:38:54,105 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:54,105 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-28 10:38:54,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:54,188 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-28 10:38:54,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:38:54,189 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-28 10:38:54,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:54,190 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:38:54,190 INFO L226 Difference]: Without dead ends: 14 [2018-09-28 10:38:54,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:54,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-28 10:38:54,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-28 10:38:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:38:54,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-28 10:38:54,194 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-28 10:38:54,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:54,194 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-28 10:38:54,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 10:38:54,195 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-28 10:38:54,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:38:54,195 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:54,195 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-28 10:38:54,196 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:54,196 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:54,196 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-28 10:38:54,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:54,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:54,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:54,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:54,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:54,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:54,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:54,310 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:38:54,326 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:38:54,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:54,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:54,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:54,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-28 10:38:54,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:38:54,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:38:54,426 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:54,426 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-28 10:38:54,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:54,520 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-28 10:38:54,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:38:54,521 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-28 10:38:54,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:54,522 INFO L225 Difference]: With dead ends: 16 [2018-09-28 10:38:54,522 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 10:38:54,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:54,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 10:38:54,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-28 10:38:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-28 10:38:54,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-28 10:38:54,526 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-28 10:38:54,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:54,527 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-28 10:38:54,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:38:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-28 10:38:54,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 10:38:54,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:54,528 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-28 10:38:54,528 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:54,528 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:54,528 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-28 10:38:54,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:54,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:54,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:54,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:54,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:54,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:54,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:54,686 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:38:54,698 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:38:54,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:54,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:54,736 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:54,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:54,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-28 10:38:54,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 10:38:54,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 10:38:54,759 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:54,759 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-28 10:38:54,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:54,851 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-28 10:38:54,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:38:54,851 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-28 10:38:54,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:54,852 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:38:54,853 INFO L226 Difference]: Without dead ends: 16 [2018-09-28 10:38:54,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:54,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-28 10:38:54,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-28 10:38:54,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:38:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-28 10:38:54,858 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-28 10:38:54,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:54,859 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-28 10:38:54,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 10:38:54,859 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-28 10:38:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:38:54,859 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:54,860 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-28 10:38:54,860 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:54,860 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:54,860 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-28 10:38:54,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:54,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:54,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:54,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:54,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:54,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:54,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:55,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:55,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:55,107 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:55,108 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-28 10:38:55,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:38:55,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:38:55,109 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:55,109 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-28 10:38:55,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:55,216 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-28 10:38:55,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:38:55,217 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-28 10:38:55,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:55,219 INFO L225 Difference]: With dead ends: 18 [2018-09-28 10:38:55,220 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:38:55,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:55,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:38:55,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-28 10:38:55,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-28 10:38:55,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-28 10:38:55,224 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-28 10:38:55,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:55,224 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-28 10:38:55,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:38:55,225 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-28 10:38:55,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-28 10:38:55,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:55,225 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-28 10:38:55,226 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:55,226 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:55,226 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-28 10:38:55,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:55,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:55,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:55,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:55,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:55,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:55,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:55,370 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:38:55,394 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:38:55,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:55,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:55,543 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:55,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:55,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-28 10:38:55,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:38:55,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:38:55,566 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:55,566 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-28 10:38:55,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:55,918 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-28 10:38:55,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:38:55,919 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-28 10:38:55,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:55,919 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:38:55,919 INFO L226 Difference]: Without dead ends: 18 [2018-09-28 10:38:55,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:55,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-28 10:38:55,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-28 10:38:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:38:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-28 10:38:55,922 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-28 10:38:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:55,923 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-28 10:38:55,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:38:55,923 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-28 10:38:55,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:38:55,923 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:55,924 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-28 10:38:55,924 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:55,924 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:55,924 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-28 10:38:55,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:55,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:55,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:55,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:55,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:56,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:56,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:56,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:38:56,139 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:38:56,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:56,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:56,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:56,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-28 10:38:56,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:38:56,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:38:56,269 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:56,269 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-28 10:38:56,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:56,397 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-28 10:38:56,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:38:56,397 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-28 10:38:56,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:56,398 INFO L225 Difference]: With dead ends: 20 [2018-09-28 10:38:56,398 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:38:56,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:56,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:38:56,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-28 10:38:56,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 10:38:56,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-28 10:38:56,402 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-28 10:38:56,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:56,402 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-28 10:38:56,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:38:56,403 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-28 10:38:56,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 10:38:56,403 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:56,403 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-28 10:38:56,404 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:56,404 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:56,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-28 10:38:56,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:56,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:56,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:56,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:56,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:56,605 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:56,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:56,614 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:38:56,648 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:38:56,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:56,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:56,890 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:56,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-28 10:38:56,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 10:38:56,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 10:38:56,892 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:56,892 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-28 10:38:57,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:57,057 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-28 10:38:57,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:38:57,058 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-28 10:38:57,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:57,059 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:38:57,059 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:38:57,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:57,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:38:57,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-28 10:38:57,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:38:57,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-28 10:38:57,063 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-28 10:38:57,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:57,064 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-28 10:38:57,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 10:38:57,064 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-28 10:38:57,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:38:57,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:57,065 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-28 10:38:57,065 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:57,065 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:57,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-28 10:38:57,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:57,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:57,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:57,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:57,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:57,253 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:57,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:57,261 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:38:57,313 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-28 10:38:57,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:57,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:57,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:57,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-28 10:38:57,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:38:57,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:38:57,539 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:57,540 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-28 10:38:57,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:57,843 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-28 10:38:57,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:38:57,844 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-28 10:38:57,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:57,845 INFO L225 Difference]: With dead ends: 22 [2018-09-28 10:38:57,845 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:38:57,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:57,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:38:57,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-28 10:38:57,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-28 10:38:57,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-28 10:38:57,849 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-28 10:38:57,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:57,849 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-28 10:38:57,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:38:57,849 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-28 10:38:57,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 10:38:57,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:57,850 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-28 10:38:57,850 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:57,850 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:57,850 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-28 10:38:57,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:57,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:57,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:57,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:57,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:57,995 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:57,995 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:58,005 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:38:58,024 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-28 10:38:58,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:58,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:58,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:58,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-28 10:38:58,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 10:38:58,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 10:38:58,123 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:58,123 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-28 10:38:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:58,348 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-28 10:38:58,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:38:58,348 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-28 10:38:58,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:58,349 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:38:58,349 INFO L226 Difference]: Without dead ends: 22 [2018-09-28 10:38:58,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-28 10:38:58,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-28 10:38:58,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:38:58,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-28 10:38:58,353 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-28 10:38:58,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:58,354 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-28 10:38:58,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 10:38:58,354 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-28 10:38:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-28 10:38:58,354 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:58,354 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-28 10:38:58,355 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:58,355 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:58,355 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-28 10:38:58,355 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:58,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:58,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:58,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:58,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:58,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:58,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:58,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:58,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:58,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:58,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-28 10:38:58,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:38:58,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:38:58,825 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:58,825 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-28 10:38:58,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:58,948 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-28 10:38:58,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:38:58,949 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-28 10:38:58,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:58,950 INFO L225 Difference]: With dead ends: 24 [2018-09-28 10:38:58,950 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:38:58,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:58,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:38:58,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-28 10:38:58,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 10:38:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-28 10:38:58,954 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-28 10:38:58,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:58,954 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-28 10:38:58,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:38:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-28 10:38:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 10:38:58,955 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:58,955 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-28 10:38:58,956 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:58,956 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:58,956 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-28 10:38:58,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:58,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:58,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:58,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:38:58,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:38:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:59,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:38:59,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:38:59,357 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:38:59,371 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:38:59,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:38:59,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:38:59,685 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:38:59,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:38:59,715 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-28 10:38:59,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:38:59,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:38:59,716 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:38:59,718 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-28 10:38:59,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:38:59,954 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-28 10:38:59,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:38:59,954 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-28 10:38:59,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:38:59,955 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:38:59,955 INFO L226 Difference]: Without dead ends: 24 [2018-09-28 10:38:59,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:38:59,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-28 10:38:59,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-28 10:38:59,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:38:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-28 10:38:59,958 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-28 10:38:59,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:38:59,959 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-28 10:38:59,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:38:59,959 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-28 10:38:59,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-28 10:38:59,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:38:59,960 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-28 10:38:59,960 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:38:59,960 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:38:59,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-28 10:38:59,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:38:59,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:38:59,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:59,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:38:59,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:38:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:00,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:00,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:00,124 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:00,144 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-28 10:39:00,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:00,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:00,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:00,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-28 10:39:00,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:39:00,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:39:00,357 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:00,357 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-28 10:39:00,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:00,726 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-28 10:39:00,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:39:00,729 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-28 10:39:00,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:00,730 INFO L225 Difference]: With dead ends: 26 [2018-09-28 10:39:00,730 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:39:00,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:00,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:39:00,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-28 10:39:00,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-28 10:39:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-28 10:39:00,734 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-28 10:39:00,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:00,734 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-28 10:39:00,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:39:00,735 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-28 10:39:00,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-28 10:39:00,735 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:00,736 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-28 10:39:00,736 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:00,736 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:00,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-28 10:39:00,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:00,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:00,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:00,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:00,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:00,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:00,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:00,924 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:00,936 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:00,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:00,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:01,037 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:01,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:01,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-28 10:39:01,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-28 10:39:01,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-28 10:39:01,059 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:01,060 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-28 10:39:01,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:01,522 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-28 10:39:01,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:39:01,522 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-28 10:39:01,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:01,523 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:39:01,523 INFO L226 Difference]: Without dead ends: 26 [2018-09-28 10:39:01,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:01,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-28 10:39:01,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-28 10:39:01,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:39:01,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-28 10:39:01,528 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-28 10:39:01,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:01,529 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-28 10:39:01,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-28 10:39:01,529 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-28 10:39:01,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-28 10:39:01,529 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:01,529 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-28 10:39:01,529 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:01,530 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:01,530 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-28 10:39:01,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:01,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:01,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:01,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:01,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:01,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:01,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:01,786 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:01,815 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-28 10:39:01,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:01,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:01,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:01,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-28 10:39:01,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:39:01,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:39:01,907 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:01,907 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-28 10:39:02,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:02,431 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-28 10:39:02,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:39:02,432 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-28 10:39:02,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:02,433 INFO L225 Difference]: With dead ends: 28 [2018-09-28 10:39:02,433 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:39:02,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:02,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:39:02,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-28 10:39:02,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-28 10:39:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-28 10:39:02,437 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-28 10:39:02,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:02,438 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-28 10:39:02,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:39:02,438 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-28 10:39:02,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:39:02,439 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:02,439 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-28 10:39:02,439 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:02,439 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:02,439 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-28 10:39:02,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:02,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:02,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:02,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:02,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:03,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:03,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:03,163 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:03,185 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-28 10:39:03,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:03,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:03,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:03,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-28 10:39:03,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-28 10:39:03,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-28 10:39:03,331 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:03,331 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-28 10:39:03,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:03,498 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-28 10:39:03,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:39:03,499 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-28 10:39:03,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:03,500 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:39:03,500 INFO L226 Difference]: Without dead ends: 28 [2018-09-28 10:39:03,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:03,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-28 10:39:03,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-28 10:39:03,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:39:03,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-28 10:39:03,505 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-28 10:39:03,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:03,505 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-28 10:39:03,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-28 10:39:03,505 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-28 10:39:03,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-28 10:39:03,506 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:03,506 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-28 10:39:03,507 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:03,507 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:03,507 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-28 10:39:03,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:03,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:03,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:03,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:03,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:03,716 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:03,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:03,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:03,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:03,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:03,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-28 10:39:03,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:39:03,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:39:03,870 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:03,870 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-28 10:39:04,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:04,030 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-28 10:39:04,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:39:04,030 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-28 10:39:04,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:04,031 INFO L225 Difference]: With dead ends: 30 [2018-09-28 10:39:04,031 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:39:04,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:04,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:39:04,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-28 10:39:04,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-28 10:39:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-28 10:39:04,037 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-28 10:39:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:04,037 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-28 10:39:04,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:39:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-28 10:39:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-28 10:39:04,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:04,039 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-28 10:39:04,039 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:04,039 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:04,039 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-28 10:39:04,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:04,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:04,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:04,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:04,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:04,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:04,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:04,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:04,218 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:04,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:04,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:04,293 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:04,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-28 10:39:04,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:39:04,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:39:04,294 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:04,294 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-28 10:39:04,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:04,461 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-28 10:39:04,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:39:04,461 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-28 10:39:04,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:04,462 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:39:04,462 INFO L226 Difference]: Without dead ends: 30 [2018-09-28 10:39:04,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:04,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-28 10:39:04,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-28 10:39:04,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:39:04,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-28 10:39:04,466 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-28 10:39:04,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:04,467 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-28 10:39:04,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:39:04,467 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-28 10:39:04,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-28 10:39:04,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:04,468 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-28 10:39:04,468 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:04,468 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:04,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-28 10:39:04,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:04,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:04,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:04,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:04,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:05,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:05,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:05,383 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:05,405 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-28 10:39:05,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:05,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:05,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:05,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-28 10:39:05,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:39:05,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:39:05,497 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:05,497 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-28 10:39:05,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:05,702 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-28 10:39:05,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:39:05,703 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-28 10:39:05,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:05,703 INFO L225 Difference]: With dead ends: 32 [2018-09-28 10:39:05,704 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:39:05,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:05,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:39:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-28 10:39:05,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 10:39:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-28 10:39:05,707 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-28 10:39:05,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:05,708 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-28 10:39:05,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:39:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-28 10:39:05,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 10:39:05,708 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:05,708 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-28 10:39:05,709 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:05,709 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:05,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-28 10:39:05,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:05,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:05,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:05,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:05,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:05,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:05,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:05,876 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:05,893 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:05,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:05,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:06,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:06,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-28 10:39:06,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-28 10:39:06,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-28 10:39:06,021 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:06,021 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-28 10:39:06,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:06,361 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-28 10:39:06,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:39:06,361 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-28 10:39:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:06,361 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:39:06,362 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:39:06,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:06,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:39:06,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-28 10:39:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:39:06,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-28 10:39:06,366 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-28 10:39:06,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:06,367 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-28 10:39:06,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-28 10:39:06,367 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-28 10:39:06,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-28 10:39:06,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:06,368 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-28 10:39:06,368 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:06,368 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:06,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-28 10:39:06,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:06,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:06,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:06,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:06,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:06,564 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:06,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:06,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:06,574 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:06,600 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-28 10:39:06,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:06,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:06,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:06,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-28 10:39:06,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:39:06,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:39:06,675 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:06,675 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-28 10:39:06,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:06,824 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-28 10:39:06,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:39:06,825 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-28 10:39:06,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:06,826 INFO L225 Difference]: With dead ends: 34 [2018-09-28 10:39:06,826 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:39:06,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:06,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:39:06,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-28 10:39:06,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-28 10:39:06,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-28 10:39:06,829 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-28 10:39:06,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:06,830 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-28 10:39:06,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:39:06,830 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-28 10:39:06,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 10:39:06,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:06,830 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-28 10:39:06,830 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:06,830 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:06,831 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-28 10:39:06,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:06,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:06,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:06,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:06,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:07,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:07,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:07,372 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:07,506 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-28 10:39:07,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:07,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:07,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:07,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-28 10:39:07,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-28 10:39:07,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-28 10:39:07,606 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:07,606 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-28 10:39:07,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:07,783 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-28 10:39:07,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:39:07,783 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-28 10:39:07,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:07,784 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:39:07,784 INFO L226 Difference]: Without dead ends: 34 [2018-09-28 10:39:07,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:07,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-28 10:39:07,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-28 10:39:07,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:39:07,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-28 10:39:07,788 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-28 10:39:07,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:07,788 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-28 10:39:07,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-28 10:39:07,788 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-28 10:39:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 10:39:07,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:07,789 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-28 10:39:07,789 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:07,789 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:07,789 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-28 10:39:07,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:07,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:07,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:07,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:07,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:07,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:07,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:08,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:08,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:08,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:08,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-28 10:39:08,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:39:08,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:39:08,142 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:08,142 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-28 10:39:08,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:08,434 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-28 10:39:08,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:39:08,434 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-28 10:39:08,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:08,435 INFO L225 Difference]: With dead ends: 36 [2018-09-28 10:39:08,435 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:39:08,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:08,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:39:08,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-28 10:39:08,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-28 10:39:08,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-28 10:39:08,440 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-28 10:39:08,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:08,440 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-28 10:39:08,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:39:08,440 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-28 10:39:08,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 10:39:08,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:08,441 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-28 10:39:08,441 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:08,442 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:08,442 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-28 10:39:08,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:08,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:08,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:08,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:08,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:08,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:08,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:08,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:08,806 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:08,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:08,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:08,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:08,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-28 10:39:08,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:39:08,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:39:08,898 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:08,898 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-28 10:39:09,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:09,056 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-28 10:39:09,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:39:09,056 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-28 10:39:09,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:09,057 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:39:09,057 INFO L226 Difference]: Without dead ends: 36 [2018-09-28 10:39:09,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:09,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-28 10:39:09,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-28 10:39:09,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-28 10:39:09,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-28 10:39:09,061 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-28 10:39:09,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:09,061 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-28 10:39:09,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:39:09,061 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-28 10:39:09,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-28 10:39:09,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:09,062 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-28 10:39:09,062 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:09,062 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:09,063 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-28 10:39:09,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:09,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:09,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:09,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:09,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:09,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:09,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:09,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:09,378 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-28 10:39:09,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:09,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:09,498 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:09,498 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-28 10:39:09,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:39:09,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:39:09,499 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:09,499 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-28 10:39:09,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:09,689 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-28 10:39:09,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:39:09,689 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-28 10:39:09,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:09,690 INFO L225 Difference]: With dead ends: 38 [2018-09-28 10:39:09,690 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:39:09,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:09,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:39:09,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-28 10:39:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 10:39:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-28 10:39:09,694 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-28 10:39:09,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:09,694 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-28 10:39:09,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:39:09,694 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-28 10:39:09,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-28 10:39:09,695 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:09,695 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-28 10:39:09,695 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:09,695 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:09,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-28 10:39:09,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:09,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:09,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:09,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:09,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:09,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:09,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:09,938 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:09,960 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:09,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:09,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:10,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:10,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-28 10:39:10,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-28 10:39:10,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-28 10:39:10,222 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:10,222 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-28 10:39:10,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:10,423 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-28 10:39:10,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:39:10,423 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-28 10:39:10,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:10,424 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:39:10,424 INFO L226 Difference]: Without dead ends: 38 [2018-09-28 10:39:10,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:10,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-28 10:39:10,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-28 10:39:10,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-28 10:39:10,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-28 10:39:10,427 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-28 10:39:10,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:10,427 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-28 10:39:10,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-28 10:39:10,427 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-28 10:39:10,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-28 10:39:10,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:10,428 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-28 10:39:10,428 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:10,428 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:10,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-28 10:39:10,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:10,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:10,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:10,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:10,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:10,595 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:10,595 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:10,603 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:10,631 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-28 10:39:10,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:10,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:10,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:10,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-28 10:39:10,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:39:10,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:39:10,746 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:10,747 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-28 10:39:10,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:10,992 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-28 10:39:10,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:39:10,993 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-28 10:39:10,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:10,993 INFO L225 Difference]: With dead ends: 40 [2018-09-28 10:39:10,993 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:39:10,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:10,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:39:10,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-28 10:39:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-28 10:39:10,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-28 10:39:10,998 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-28 10:39:10,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:10,999 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-28 10:39:10,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:39:10,999 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-28 10:39:10,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:39:10,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:11,000 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-28 10:39:11,000 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:11,000 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:11,000 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-28 10:39:11,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:11,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:11,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:11,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:11,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:11,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:11,372 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:11,379 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:11,419 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-28 10:39:11,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:11,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:11,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:11,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-28 10:39:11,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-28 10:39:11,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-28 10:39:11,767 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:11,767 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-28 10:39:12,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:12,301 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-28 10:39:12,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:39:12,302 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-28 10:39:12,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:12,302 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:39:12,302 INFO L226 Difference]: Without dead ends: 40 [2018-09-28 10:39:12,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:12,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-28 10:39:12,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-28 10:39:12,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-28 10:39:12,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-28 10:39:12,306 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-28 10:39:12,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:12,306 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-28 10:39:12,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-28 10:39:12,307 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-28 10:39:12,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-28 10:39:12,307 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:12,307 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-28 10:39:12,307 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:12,307 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:12,308 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-28 10:39:12,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:12,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:12,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:12,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:12,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:12,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:12,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:12,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:12,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:12,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:12,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-28 10:39:12,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:39:12,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:39:12,635 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:12,635 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-28 10:39:12,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:12,821 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-28 10:39:12,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:39:12,821 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-28 10:39:12,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:12,822 INFO L225 Difference]: With dead ends: 42 [2018-09-28 10:39:12,822 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:39:12,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:12,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:39:12,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-28 10:39:12,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-28 10:39:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-28 10:39:12,824 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-28 10:39:12,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:12,824 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-28 10:39:12,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:39:12,824 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-28 10:39:12,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-28 10:39:12,825 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:12,825 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-28 10:39:12,825 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:12,825 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:12,825 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-28 10:39:12,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:12,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:12,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:12,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:12,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:13,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:13,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:13,010 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:13,033 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:13,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:13,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:13,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:13,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-28 10:39:13,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:39:13,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:39:13,143 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:13,143 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-28 10:39:13,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:13,355 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-28 10:39:13,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:39:13,356 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-28 10:39:13,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:13,357 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:39:13,357 INFO L226 Difference]: Without dead ends: 42 [2018-09-28 10:39:13,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:13,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-28 10:39:13,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-28 10:39:13,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-28 10:39:13,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-28 10:39:13,360 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-28 10:39:13,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:13,361 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-28 10:39:13,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:39:13,361 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-28 10:39:13,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-28 10:39:13,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:13,362 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-28 10:39:13,362 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:13,362 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:13,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-28 10:39:13,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:13,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:13,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:13,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:13,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:13,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:13,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:13,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:13,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-28 10:39:13,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:13,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:13,730 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:13,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-28 10:39:13,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-28 10:39:13,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-28 10:39:13,731 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:13,731 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-28 10:39:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:13,988 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-28 10:39:13,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-28 10:39:13,988 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-28 10:39:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:13,989 INFO L225 Difference]: With dead ends: 44 [2018-09-28 10:39:13,989 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:39:13,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:13,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:39:13,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-28 10:39:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 10:39:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-28 10:39:13,993 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-28 10:39:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:13,993 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-28 10:39:13,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-28 10:39:13,993 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-28 10:39:13,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-28 10:39:13,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:13,994 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-28 10:39:13,994 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:13,994 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:13,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-28 10:39:13,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:13,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:13,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:13,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:13,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:14,588 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:14,588 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:14,596 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:14,617 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:14,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:14,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:14,713 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:14,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-28 10:39:14,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-28 10:39:14,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-28 10:39:14,714 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:14,714 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-28 10:39:15,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:15,051 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-28 10:39:15,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:39:15,051 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-28 10:39:15,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:15,052 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:39:15,052 INFO L226 Difference]: Without dead ends: 44 [2018-09-28 10:39:15,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:15,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-28 10:39:15,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-28 10:39:15,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-28 10:39:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-28 10:39:15,054 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-28 10:39:15,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:15,055 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-28 10:39:15,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-28 10:39:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-28 10:39:15,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-28 10:39:15,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:15,056 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-28 10:39:15,056 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:15,056 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:15,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-28 10:39:15,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:15,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:15,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:15,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:15,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:15,430 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:15,430 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:15,437 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:15,469 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-28 10:39:15,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:15,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:15,598 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:15,598 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-28 10:39:15,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:39:15,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:39:15,599 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:15,599 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-28 10:39:15,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:15,930 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-28 10:39:15,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-28 10:39:15,931 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-28 10:39:15,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:15,931 INFO L225 Difference]: With dead ends: 46 [2018-09-28 10:39:15,932 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:39:15,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:15,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:39:15,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-28 10:39:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-28 10:39:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-28 10:39:15,934 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-28 10:39:15,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:15,934 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-28 10:39:15,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:39:15,934 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-28 10:39:15,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-28 10:39:15,935 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:15,935 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-09-28 10:39:15,935 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:15,935 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:15,935 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-09-28 10:39:15,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:15,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:15,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:15,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:15,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:16,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:16,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:16,570 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:16,604 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-28 10:39:16,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:16,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:16,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:16,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-28 10:39:16,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-28 10:39:16,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-28 10:39:16,718 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:16,718 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-28 10:39:16,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:16,948 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-28 10:39:16,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 10:39:16,949 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-28 10:39:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:16,949 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:39:16,949 INFO L226 Difference]: Without dead ends: 46 [2018-09-28 10:39:16,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:16,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-28 10:39:16,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-28 10:39:16,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-28 10:39:16,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-28 10:39:16,953 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-28 10:39:16,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:16,953 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-28 10:39:16,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-28 10:39:16,953 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-28 10:39:16,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-28 10:39:16,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:16,954 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-09-28 10:39:16,954 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:16,954 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:16,954 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-09-28 10:39:16,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:16,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:16,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:16,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:16,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:17,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:17,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:17,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:17,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:17,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:17,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-28 10:39:17,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-28 10:39:17,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-28 10:39:17,489 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:17,490 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-28 10:39:17,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:17,698 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-28 10:39:17,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-28 10:39:17,699 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-28 10:39:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:17,699 INFO L225 Difference]: With dead ends: 48 [2018-09-28 10:39:17,699 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:39:17,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:17,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:39:17,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-28 10:39:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-28 10:39:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-28 10:39:17,702 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-28 10:39:17,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:17,703 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-28 10:39:17,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-28 10:39:17,703 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-28 10:39:17,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-28 10:39:17,703 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:17,703 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-09-28 10:39:17,703 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:17,704 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:17,704 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-09-28 10:39:17,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:17,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:17,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:17,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:17,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:18,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:18,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:18,031 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:18,056 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:18,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:18,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:18,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:18,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-28 10:39:18,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-28 10:39:18,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-28 10:39:18,151 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:18,151 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-28 10:39:18,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:18,374 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-28 10:39:18,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:39:18,375 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-28 10:39:18,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:18,375 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:39:18,375 INFO L226 Difference]: Without dead ends: 48 [2018-09-28 10:39:18,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:18,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-28 10:39:18,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-28 10:39:18,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-28 10:39:18,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-28 10:39:18,378 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-28 10:39:18,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:18,378 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-28 10:39:18,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-28 10:39:18,379 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-28 10:39:18,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-28 10:39:18,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:18,379 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-09-28 10:39:18,379 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:18,380 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:18,380 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-09-28 10:39:18,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:18,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:18,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:18,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:18,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:18,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:18,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:18,618 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:18,653 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-28 10:39:18,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:18,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:18,783 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:18,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-28 10:39:18,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-28 10:39:18,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-28 10:39:18,784 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:18,785 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-28 10:39:19,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:19,314 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-28 10:39:19,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 10:39:19,314 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-28 10:39:19,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:19,315 INFO L225 Difference]: With dead ends: 50 [2018-09-28 10:39:19,315 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:39:19,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:19,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:39:19,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-28 10:39:19,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-28 10:39:19,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-28 10:39:19,318 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-28 10:39:19,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:19,319 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-28 10:39:19,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-28 10:39:19,319 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-28 10:39:19,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-28 10:39:19,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:19,320 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-09-28 10:39:19,320 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:19,320 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:19,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-09-28 10:39:19,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:19,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:19,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:19,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:19,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:19,581 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:19,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:19,590 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:19,623 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:19,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:19,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:19,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:19,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-28 10:39:19,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-28 10:39:19,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-28 10:39:19,820 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:19,820 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-28 10:39:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:20,090 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-28 10:39:20,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:39:20,090 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-28 10:39:20,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:20,091 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:39:20,091 INFO L226 Difference]: Without dead ends: 50 [2018-09-28 10:39:20,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:20,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-28 10:39:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-28 10:39:20,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-28 10:39:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-28 10:39:20,094 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-28 10:39:20,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:20,094 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-28 10:39:20,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-28 10:39:20,094 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-28 10:39:20,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-28 10:39:20,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:20,095 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-09-28 10:39:20,095 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:20,095 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:20,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-09-28 10:39:20,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:20,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:20,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:20,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:20,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:20,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:20,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:20,446 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:20,480 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-28 10:39:20,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:20,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:20,614 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:20,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-28 10:39:20,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-28 10:39:20,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-28 10:39:20,615 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:20,616 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-28 10:39:20,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:20,857 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-28 10:39:20,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-28 10:39:20,858 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-28 10:39:20,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:20,858 INFO L225 Difference]: With dead ends: 52 [2018-09-28 10:39:20,858 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:39:20,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:20,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:39:20,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-28 10:39:20,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-28 10:39:20,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-28 10:39:20,861 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-28 10:39:20,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:20,862 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-28 10:39:20,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-28 10:39:20,862 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-28 10:39:20,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-28 10:39:20,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:20,863 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-09-28 10:39:20,863 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:20,863 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:20,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-09-28 10:39:20,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:20,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:20,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:20,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:20,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:21,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:21,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:21,168 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:21,206 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-28 10:39:21,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:21,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:21,316 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:21,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-28 10:39:21,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-28 10:39:21,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-28 10:39:21,317 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:21,317 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-28 10:39:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:21,666 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-28 10:39:21,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-28 10:39:21,667 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-28 10:39:21,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:21,667 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:39:21,667 INFO L226 Difference]: Without dead ends: 52 [2018-09-28 10:39:21,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:21,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-28 10:39:21,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-28 10:39:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-28 10:39:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-28 10:39:21,670 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-28 10:39:21,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:21,670 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-28 10:39:21,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-28 10:39:21,671 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-28 10:39:21,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-28 10:39:21,671 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:21,671 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-09-28 10:39:21,671 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:21,671 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:21,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-09-28 10:39:21,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:21,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:21,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:21,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:21,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:22,573 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:22,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:22,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:22,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:22,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:22,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-28 10:39:22,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-28 10:39:22,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-28 10:39:22,718 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:22,718 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-28 10:39:23,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:23,019 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-28 10:39:23,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-28 10:39:23,020 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-28 10:39:23,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:23,021 INFO L225 Difference]: With dead ends: 54 [2018-09-28 10:39:23,021 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:39:23,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:23,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:39:23,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-28 10:39:23,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-28 10:39:23,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-28 10:39:23,024 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-28 10:39:23,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:23,024 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-28 10:39:23,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-28 10:39:23,024 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-28 10:39:23,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-28 10:39:23,025 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:23,025 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-09-28 10:39:23,025 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:23,026 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:23,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-09-28 10:39:23,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:23,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:23,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:23,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:23,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:23,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:23,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:23,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:23,319 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:23,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:23,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:23,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:23,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-28 10:39:23,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-28 10:39:23,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-28 10:39:23,487 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:23,487 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-28 10:39:23,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:23,799 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-28 10:39:23,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:39:23,800 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-28 10:39:23,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:23,801 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:39:23,801 INFO L226 Difference]: Without dead ends: 54 [2018-09-28 10:39:23,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:23,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-28 10:39:23,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-28 10:39:23,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-28 10:39:23,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-28 10:39:23,804 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-28 10:39:23,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:23,804 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-28 10:39:23,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-28 10:39:23,805 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-28 10:39:23,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-28 10:39:23,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:23,805 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-09-28 10:39:23,805 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:23,805 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:23,806 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-09-28 10:39:23,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:23,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:23,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:23,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:23,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:24,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:24,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:24,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:24,521 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-28 10:39:24,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:24,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:24,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:24,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-28 10:39:24,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-28 10:39:24,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-28 10:39:24,658 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:24,658 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-28 10:39:24,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:24,901 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-28 10:39:24,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-28 10:39:24,901 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-28 10:39:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:24,902 INFO L225 Difference]: With dead ends: 56 [2018-09-28 10:39:24,902 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:39:24,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:24,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:39:24,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-28 10:39:24,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-28 10:39:24,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-28 10:39:24,905 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-28 10:39:24,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:24,905 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-28 10:39:24,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-28 10:39:24,906 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-28 10:39:24,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-28 10:39:24,906 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:24,906 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-09-28 10:39:24,906 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:24,907 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:24,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-09-28 10:39:24,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:24,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:24,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:24,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:24,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:25,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:25,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:25,221 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:25,251 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:25,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:25,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:25,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:25,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-28 10:39:25,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-28 10:39:25,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-28 10:39:25,503 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:25,503 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-28 10:39:25,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:25,815 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-28 10:39:25,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 10:39:25,816 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-28 10:39:25,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:25,816 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:39:25,817 INFO L226 Difference]: Without dead ends: 56 [2018-09-28 10:39:25,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:25,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-28 10:39:25,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-28 10:39:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-28 10:39:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-28 10:39:25,819 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-28 10:39:25,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:25,819 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-28 10:39:25,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-28 10:39:25,820 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-28 10:39:25,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-28 10:39:25,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:25,820 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-09-28 10:39:25,820 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:25,820 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:25,820 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-09-28 10:39:25,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:25,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:25,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:25,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:25,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:26,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:26,375 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:26,382 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:26,433 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-28 10:39:26,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:26,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:26,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:26,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-28 10:39:26,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-28 10:39:26,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-28 10:39:26,672 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:26,673 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-28 10:39:27,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:27,088 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-28 10:39:27,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 10:39:27,089 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-28 10:39:27,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:27,090 INFO L225 Difference]: With dead ends: 58 [2018-09-28 10:39:27,090 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:39:27,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:27,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:39:27,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-28 10:39:27,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-28 10:39:27,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-28 10:39:27,093 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-28 10:39:27,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:27,093 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-28 10:39:27,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-28 10:39:27,093 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-28 10:39:27,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-28 10:39:27,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:27,094 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-09-28 10:39:27,094 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:27,094 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:27,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-09-28 10:39:27,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:27,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:27,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:27,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:27,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:27,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:27,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:27,398 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:27,439 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-28 10:39:27,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:27,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:27,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:27,599 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-28 10:39:27,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-28 10:39:27,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-28 10:39:27,600 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:27,600 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-28 10:39:27,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:27,940 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-28 10:39:27,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-28 10:39:27,940 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-28 10:39:27,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:27,941 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:39:27,941 INFO L226 Difference]: Without dead ends: 58 [2018-09-28 10:39:27,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:27,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-28 10:39:27,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-28 10:39:27,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-28 10:39:27,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-28 10:39:27,944 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-28 10:39:27,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:27,944 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-28 10:39:27,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-28 10:39:27,944 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-28 10:39:27,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-28 10:39:27,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:27,945 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-09-28 10:39:27,945 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:27,945 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:27,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-09-28 10:39:27,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:27,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:27,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:27,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:27,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:28,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:28,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:28,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:28,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:28,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:28,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-28 10:39:28,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-28 10:39:28,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-28 10:39:28,393 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:28,393 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-28 10:39:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:28,640 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-28 10:39:28,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-28 10:39:28,640 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-28 10:39:28,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:28,641 INFO L225 Difference]: With dead ends: 60 [2018-09-28 10:39:28,641 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:39:28,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:28,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:39:28,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-28 10:39:28,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-28 10:39:28,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-28 10:39:28,643 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-28 10:39:28,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:28,643 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-28 10:39:28,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-28 10:39:28,643 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-28 10:39:28,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-28 10:39:28,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:28,644 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-09-28 10:39:28,644 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:28,644 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:28,644 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-09-28 10:39:28,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:28,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:28,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:28,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:28,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:28,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:28,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:28,916 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:28,948 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:28,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:28,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:29,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:29,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-28 10:39:29,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-28 10:39:29,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-28 10:39:29,085 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:29,085 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-28 10:39:29,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:29,444 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-28 10:39:29,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:39:29,444 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-28 10:39:29,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:29,445 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:39:29,445 INFO L226 Difference]: Without dead ends: 60 [2018-09-28 10:39:29,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:29,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-28 10:39:29,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-28 10:39:29,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-28 10:39:29,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-28 10:39:29,448 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-28 10:39:29,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:29,449 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-28 10:39:29,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-28 10:39:29,449 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-28 10:39:29,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-28 10:39:29,449 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:29,449 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-09-28 10:39:29,450 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:29,450 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:29,450 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-09-28 10:39:29,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:29,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:29,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:29,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:29,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:29,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:29,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:29,919 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:29,970 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-28 10:39:29,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:29,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:30,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:30,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-28 10:39:30,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-28 10:39:30,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-28 10:39:30,123 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:30,124 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-28 10:39:30,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:30,392 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-28 10:39:30,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-28 10:39:30,393 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-28 10:39:30,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:30,394 INFO L225 Difference]: With dead ends: 62 [2018-09-28 10:39:30,394 INFO L226 Difference]: Without dead ends: 61 [2018-09-28 10:39:30,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:30,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-28 10:39:30,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-28 10:39:30,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-28 10:39:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-28 10:39:30,397 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-28 10:39:30,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:30,397 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-28 10:39:30,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-28 10:39:30,397 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-28 10:39:30,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-28 10:39:30,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:30,398 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-09-28 10:39:30,398 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:30,398 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:30,398 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-09-28 10:39:30,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:30,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:30,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:30,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:30,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:31,149 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:31,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:31,158 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:31,191 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:31,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:31,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:31,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:31,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-28 10:39:31,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-28 10:39:31,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-28 10:39:31,327 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:31,327 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-28 10:39:31,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:31,865 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-28 10:39:31,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-28 10:39:31,865 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-28 10:39:31,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:31,865 INFO L225 Difference]: With dead ends: 63 [2018-09-28 10:39:31,866 INFO L226 Difference]: Without dead ends: 62 [2018-09-28 10:39:31,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:31,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-28 10:39:31,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-28 10:39:31,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-28 10:39:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-28 10:39:31,868 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-28 10:39:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:31,868 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-28 10:39:31,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-28 10:39:31,869 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-28 10:39:31,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-28 10:39:31,869 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:31,869 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-09-28 10:39:31,869 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:31,870 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:31,870 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-09-28 10:39:31,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:31,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:31,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:31,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:31,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:32,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:32,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:32,452 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:32,497 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-28 10:39:32,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:32,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:32,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:32,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-28 10:39:32,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-28 10:39:32,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-28 10:39:32,640 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:32,640 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-28 10:39:33,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:33,011 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-28 10:39:33,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-28 10:39:33,011 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-28 10:39:33,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:33,012 INFO L225 Difference]: With dead ends: 64 [2018-09-28 10:39:33,012 INFO L226 Difference]: Without dead ends: 63 [2018-09-28 10:39:33,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-28 10:39:33,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-28 10:39:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-28 10:39:33,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-28 10:39:33,015 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-28 10:39:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:33,016 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-28 10:39:33,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-28 10:39:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-28 10:39:33,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-28 10:39:33,016 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:33,016 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-09-28 10:39:33,017 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:33,017 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:33,017 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-09-28 10:39:33,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:33,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:33,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:33,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:33,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:34,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:34,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:34,577 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:34,630 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-28 10:39:34,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:34,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:34,856 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:34,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-28 10:39:34,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-28 10:39:34,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-28 10:39:34,857 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:34,857 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-28 10:39:35,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:35,155 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-28 10:39:35,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-28 10:39:35,155 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-28 10:39:35,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:35,156 INFO L225 Difference]: With dead ends: 65 [2018-09-28 10:39:35,156 INFO L226 Difference]: Without dead ends: 64 [2018-09-28 10:39:35,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:35,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-28 10:39:35,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-28 10:39:35,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-28 10:39:35,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-28 10:39:35,159 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-28 10:39:35,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:35,159 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-28 10:39:35,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-28 10:39:35,160 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-28 10:39:35,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-28 10:39:35,160 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:35,160 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-09-28 10:39:35,161 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:35,161 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:35,161 INFO L82 PathProgramCache]: Analyzing trace with hash 88142689, now seen corresponding path program 61 times [2018-09-28 10:39:35,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:35,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:35,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:35,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:35,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:35,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:35,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:35,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:35,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:35,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:35,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-28 10:39:35,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-28 10:39:35,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-28 10:39:35,890 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:35,890 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-28 10:39:36,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:36,167 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-28 10:39:36,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-28 10:39:36,168 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-28 10:39:36,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:36,169 INFO L225 Difference]: With dead ends: 66 [2018-09-28 10:39:36,169 INFO L226 Difference]: Without dead ends: 65 [2018-09-28 10:39:36,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:36,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-28 10:39:36,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-28 10:39:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-28 10:39:36,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-28 10:39:36,171 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-28 10:39:36,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:36,171 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-28 10:39:36,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-28 10:39:36,172 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-28 10:39:36,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-28 10:39:36,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:36,172 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1] [2018-09-28 10:39:36,173 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:36,173 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:36,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543993, now seen corresponding path program 62 times [2018-09-28 10:39:36,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:36,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:36,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:36,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:36,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:36,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:36,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:36,495 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:36,530 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:36,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:36,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:36,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:36,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-28 10:39:36,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-28 10:39:36,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-28 10:39:36,687 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:36,687 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-28 10:39:37,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:37,277 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-28 10:39:37,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-28 10:39:37,278 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-28 10:39:37,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:37,279 INFO L225 Difference]: With dead ends: 67 [2018-09-28 10:39:37,279 INFO L226 Difference]: Without dead ends: 66 [2018-09-28 10:39:37,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-28 10:39:37,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-28 10:39:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-28 10:39:37,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-28 10:39:37,285 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-28 10:39:37,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:37,285 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-28 10:39:37,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-28 10:39:37,285 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-28 10:39:37,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-28 10:39:37,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:37,286 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1] [2018-09-28 10:39:37,286 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:37,286 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:37,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223583, now seen corresponding path program 63 times [2018-09-28 10:39:37,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:37,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:37,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:37,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:37,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:38,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:38,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:38,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:38,566 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-28 10:39:38,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:38,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:38,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:38,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-28 10:39:38,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-28 10:39:38,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-28 10:39:38,709 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:38,709 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-28 10:39:39,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:39,121 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-28 10:39:39,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-28 10:39:39,121 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-28 10:39:39,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:39,122 INFO L225 Difference]: With dead ends: 68 [2018-09-28 10:39:39,122 INFO L226 Difference]: Without dead ends: 67 [2018-09-28 10:39:39,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:39,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-28 10:39:39,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-28 10:39:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-28 10:39:39,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-28 10:39:39,125 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-28 10:39:39,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:39,126 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-28 10:39:39,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-28 10:39:39,126 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-28 10:39:39,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-28 10:39:39,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:39,127 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1] [2018-09-28 10:39:39,127 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:39,127 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:39,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774535, now seen corresponding path program 64 times [2018-09-28 10:39:39,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:39,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:39,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:39,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:39,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:39,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:39,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:39,445 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:39,501 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:39,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:39,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:39,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:39,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-28 10:39:39,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-28 10:39:39,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-28 10:39:39,706 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:39,706 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-28 10:39:39,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:39,993 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-28 10:39:39,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-28 10:39:39,993 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-28 10:39:39,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:39,994 INFO L225 Difference]: With dead ends: 69 [2018-09-28 10:39:39,994 INFO L226 Difference]: Without dead ends: 68 [2018-09-28 10:39:39,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:39,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-28 10:39:39,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-28 10:39:39,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-28 10:39:39,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-28 10:39:39,996 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-28 10:39:39,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:39,997 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-28 10:39:39,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-28 10:39:39,997 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-28 10:39:39,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-28 10:39:39,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:39,998 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1] [2018-09-28 10:39:39,998 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:39,998 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:39,998 INFO L82 PathProgramCache]: Analyzing trace with hash -892597023, now seen corresponding path program 65 times [2018-09-28 10:39:39,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:39,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:39,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:39,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:39,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:40,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:40,325 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:40,332 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:40,428 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-28 10:39:40,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:40,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:40,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:40,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-28 10:39:40,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-28 10:39:40,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-28 10:39:40,579 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:40,579 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-28 10:39:40,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:40,939 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-28 10:39:40,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-28 10:39:40,939 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-28 10:39:40,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:40,940 INFO L225 Difference]: With dead ends: 70 [2018-09-28 10:39:40,940 INFO L226 Difference]: Without dead ends: 69 [2018-09-28 10:39:40,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:40,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-28 10:39:40,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-28 10:39:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-28 10:39:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-28 10:39:40,942 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-28 10:39:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:40,942 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-28 10:39:40,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-28 10:39:40,943 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-28 10:39:40,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-28 10:39:40,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:40,943 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1] [2018-09-28 10:39:40,944 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:40,944 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:40,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703993, now seen corresponding path program 66 times [2018-09-28 10:39:40,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:40,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:40,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:40,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:40,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:41,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:41,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:41,312 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:41,368 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-28 10:39:41,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:41,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:41,537 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:41,537 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-28 10:39:41,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-28 10:39:41,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-28 10:39:41,538 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:41,538 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-09-28 10:39:42,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:42,149 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-28 10:39:42,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-28 10:39:42,149 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-09-28 10:39:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:42,150 INFO L225 Difference]: With dead ends: 71 [2018-09-28 10:39:42,150 INFO L226 Difference]: Without dead ends: 70 [2018-09-28 10:39:42,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:42,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-28 10:39:42,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-28 10:39:42,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-28 10:39:42,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-28 10:39:42,152 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-28 10:39:42,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:42,152 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-28 10:39:42,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-28 10:39:42,152 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-28 10:39:42,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-28 10:39:42,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:42,153 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1] [2018-09-28 10:39:42,153 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:42,153 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:42,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718305, now seen corresponding path program 67 times [2018-09-28 10:39:42,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:42,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:42,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:42,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:42,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:42,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:42,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:42,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:42,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:42,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:42,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-28 10:39:42,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-28 10:39:42,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-28 10:39:42,740 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:42,740 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-28 10:39:43,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:43,183 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-28 10:39:43,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-28 10:39:43,183 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-28 10:39:43,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:43,184 INFO L225 Difference]: With dead ends: 72 [2018-09-28 10:39:43,184 INFO L226 Difference]: Without dead ends: 71 [2018-09-28 10:39:43,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:43,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-28 10:39:43,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-28 10:39:43,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-28 10:39:43,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-28 10:39:43,187 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-28 10:39:43,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:43,187 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-28 10:39:43,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-28 10:39:43,188 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-28 10:39:43,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-28 10:39:43,188 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:43,188 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1] [2018-09-28 10:39:43,189 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:43,189 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:43,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438265, now seen corresponding path program 68 times [2018-09-28 10:39:43,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:43,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:43,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:43,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:43,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:43,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:43,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:43,548 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:43,586 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:43,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:43,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:43,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:43,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-28 10:39:43,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-28 10:39:43,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-28 10:39:43,746 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:43,746 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-09-28 10:39:44,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:44,097 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-28 10:39:44,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 10:39:44,098 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-09-28 10:39:44,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:44,099 INFO L225 Difference]: With dead ends: 73 [2018-09-28 10:39:44,099 INFO L226 Difference]: Without dead ends: 72 [2018-09-28 10:39:44,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:44,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-28 10:39:44,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-28 10:39:44,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-28 10:39:44,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-28 10:39:44,102 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-28 10:39:44,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:44,102 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-28 10:39:44,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-28 10:39:44,102 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-28 10:39:44,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-28 10:39:44,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:44,103 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1] [2018-09-28 10:39:44,103 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:44,103 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:44,103 INFO L82 PathProgramCache]: Analyzing trace with hash 976119393, now seen corresponding path program 69 times [2018-09-28 10:39:44,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:44,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:44,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:44,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:44,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:44,474 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:44,474 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:44,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:44,578 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-28 10:39:44,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:44,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:44,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:44,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-28 10:39:44,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-28 10:39:44,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-28 10:39:44,733 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:44,733 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-28 10:39:45,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:45,256 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-28 10:39:45,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-28 10:39:45,256 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-28 10:39:45,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:45,257 INFO L225 Difference]: With dead ends: 74 [2018-09-28 10:39:45,257 INFO L226 Difference]: Without dead ends: 73 [2018-09-28 10:39:45,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-28 10:39:45,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-28 10:39:45,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-28 10:39:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-28 10:39:45,262 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-28 10:39:45,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:45,262 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-28 10:39:45,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-28 10:39:45,262 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-28 10:39:45,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-28 10:39:45,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:45,263 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1] [2018-09-28 10:39:45,263 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:45,264 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:45,264 INFO L82 PathProgramCache]: Analyzing trace with hash 194930055, now seen corresponding path program 70 times [2018-09-28 10:39:45,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:45,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:45,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:45,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:45,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:45,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:45,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:45,665 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:45,706 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:45,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:45,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:46,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:46,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-28 10:39:46,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-28 10:39:46,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-28 10:39:46,941 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:46,941 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-09-28 10:39:48,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:48,530 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-28 10:39:48,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-28 10:39:48,531 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-09-28 10:39:48,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:48,531 INFO L225 Difference]: With dead ends: 75 [2018-09-28 10:39:48,531 INFO L226 Difference]: Without dead ends: 74 [2018-09-28 10:39:48,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-28 10:39:48,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-28 10:39:48,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-28 10:39:48,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-28 10:39:48,536 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-28 10:39:48,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:48,536 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-28 10:39:48,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-28 10:39:48,536 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-28 10:39:48,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-28 10:39:48,537 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:48,537 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1] [2018-09-28 10:39:48,537 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:48,537 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:48,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864353, now seen corresponding path program 71 times [2018-09-28 10:39:48,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:48,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:48,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:48,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:48,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:48,879 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:48,879 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:48,886 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:48,962 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-28 10:39:48,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:48,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:49,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:49,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-28 10:39:49,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-28 10:39:49,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-28 10:39:49,171 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:49,172 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-28 10:39:49,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:49,814 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-28 10:39:49,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-28 10:39:49,815 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-28 10:39:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:49,816 INFO L225 Difference]: With dead ends: 76 [2018-09-28 10:39:49,816 INFO L226 Difference]: Without dead ends: 75 [2018-09-28 10:39:49,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:49,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-28 10:39:49,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-28 10:39:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-28 10:39:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-28 10:39:49,820 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-28 10:39:49,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:49,820 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-28 10:39:49,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-28 10:39:49,820 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-28 10:39:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-28 10:39:49,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:49,821 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1] [2018-09-28 10:39:49,821 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:49,821 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:49,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779961, now seen corresponding path program 72 times [2018-09-28 10:39:49,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:49,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:49,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:49,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:49,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:50,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:50,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:50,223 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:50,324 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-28 10:39:50,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:50,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:50,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:50,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-28 10:39:50,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-28 10:39:50,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-28 10:39:50,974 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:50,974 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-09-28 10:39:51,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:51,488 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-28 10:39:51,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-28 10:39:51,489 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-09-28 10:39:51,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:51,490 INFO L225 Difference]: With dead ends: 77 [2018-09-28 10:39:51,490 INFO L226 Difference]: Without dead ends: 76 [2018-09-28 10:39:51,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:51,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-28 10:39:51,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-28 10:39:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-28 10:39:51,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-28 10:39:51,494 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-28 10:39:51,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:51,494 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-28 10:39:51,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-28 10:39:51,494 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-28 10:39:51,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-28 10:39:51,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:51,495 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1] [2018-09-28 10:39:51,495 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:51,495 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:51,495 INFO L82 PathProgramCache]: Analyzing trace with hash 365428705, now seen corresponding path program 73 times [2018-09-28 10:39:51,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:51,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:51,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:51,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:51,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:51,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:51,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:51,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:51,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:52,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:52,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-28 10:39:52,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-28 10:39:52,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-28 10:39:52,153 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:52,153 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-28 10:39:52,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:52,750 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-28 10:39:52,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-28 10:39:52,750 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-28 10:39:52,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:52,751 INFO L225 Difference]: With dead ends: 78 [2018-09-28 10:39:52,751 INFO L226 Difference]: Without dead ends: 77 [2018-09-28 10:39:52,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:52,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-28 10:39:52,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-28 10:39:52,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-28 10:39:52,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-28 10:39:52,753 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-28 10:39:52,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:52,754 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-28 10:39:52,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-28 10:39:52,754 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-28 10:39:52,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-28 10:39:52,755 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:52,755 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1] [2018-09-28 10:39:52,755 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:52,755 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:52,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1556612089, now seen corresponding path program 74 times [2018-09-28 10:39:52,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:52,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:52,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:52,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:52,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:53,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:53,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:53,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:39:53,517 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:39:53,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:53,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:53,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:53,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-28 10:39:53,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-28 10:39:53,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-28 10:39:53,679 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:53,679 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-09-28 10:39:54,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:54,079 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-28 10:39:54,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-28 10:39:54,079 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-09-28 10:39:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:54,080 INFO L225 Difference]: With dead ends: 79 [2018-09-28 10:39:54,080 INFO L226 Difference]: Without dead ends: 78 [2018-09-28 10:39:54,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:54,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-28 10:39:54,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-28 10:39:54,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-28 10:39:54,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-28 10:39:54,083 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-28 10:39:54,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:54,083 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-28 10:39:54,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-28 10:39:54,083 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-28 10:39:54,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-28 10:39:54,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:54,084 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1] [2018-09-28 10:39:54,084 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:54,084 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:54,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334559, now seen corresponding path program 75 times [2018-09-28 10:39:54,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:54,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:54,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:54,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:54,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:54,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:54,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:54,489 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:39:54,557 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-28 10:39:54,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:54,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:54,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:54,724 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-28 10:39:54,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-28 10:39:54,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-28 10:39:54,725 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:54,725 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-28 10:39:55,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:55,149 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-28 10:39:55,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-28 10:39:55,149 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-28 10:39:55,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:55,150 INFO L225 Difference]: With dead ends: 80 [2018-09-28 10:39:55,150 INFO L226 Difference]: Without dead ends: 79 [2018-09-28 10:39:55,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-28 10:39:55,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-28 10:39:55,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-28 10:39:55,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-28 10:39:55,152 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-28 10:39:55,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:55,152 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-28 10:39:55,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-28 10:39:55,152 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-28 10:39:55,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-28 10:39:55,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:55,153 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1] [2018-09-28 10:39:55,153 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:55,153 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:55,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600313, now seen corresponding path program 76 times [2018-09-28 10:39:55,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:55,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:55,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:55,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:55,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:55,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:55,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:55,536 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:39:55,579 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:39:55,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:55,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:55,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:55,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-28 10:39:55,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-28 10:39:55,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-28 10:39:55,761 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:55,761 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-09-28 10:39:56,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:56,164 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-28 10:39:56,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-28 10:39:56,164 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-09-28 10:39:56,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:56,165 INFO L225 Difference]: With dead ends: 81 [2018-09-28 10:39:56,165 INFO L226 Difference]: Without dead ends: 80 [2018-09-28 10:39:56,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:56,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-28 10:39:56,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-28 10:39:56,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-28 10:39:56,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-28 10:39:56,167 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-28 10:39:56,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:56,168 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-28 10:39:56,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-28 10:39:56,168 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-28 10:39:56,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-28 10:39:56,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:56,169 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1] [2018-09-28 10:39:56,169 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:56,169 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:56,169 INFO L82 PathProgramCache]: Analyzing trace with hash -268904095, now seen corresponding path program 77 times [2018-09-28 10:39:56,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:56,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:56,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:56,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:56,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:56,584 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:56,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:56,592 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:39:56,657 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-28 10:39:56,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:56,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:56,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:56,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-28 10:39:56,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-28 10:39:56,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-28 10:39:56,830 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:56,830 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-28 10:39:57,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:57,631 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-28 10:39:57,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-28 10:39:57,632 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-28 10:39:57,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:57,633 INFO L225 Difference]: With dead ends: 82 [2018-09-28 10:39:57,633 INFO L226 Difference]: Without dead ends: 81 [2018-09-28 10:39:57,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:57,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-28 10:39:57,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-28 10:39:57,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-28 10:39:57,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-28 10:39:57,637 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-28 10:39:57,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:57,637 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-28 10:39:57,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-28 10:39:57,637 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-28 10:39:57,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-28 10:39:57,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:57,638 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1] [2018-09-28 10:39:57,638 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:57,638 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:57,639 INFO L82 PathProgramCache]: Analyzing trace with hash 253907591, now seen corresponding path program 78 times [2018-09-28 10:39:57,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:57,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:57,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:57,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:57,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:58,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:58,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:58,195 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:39:58,264 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-28 10:39:58,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:39:58,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:58,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:58,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-28 10:39:58,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-28 10:39:58,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-28 10:39:58,443 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:58,443 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-09-28 10:39:59,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:39:59,080 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-28 10:39:59,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-28 10:39:59,080 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-09-28 10:39:59,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:39:59,081 INFO L225 Difference]: With dead ends: 83 [2018-09-28 10:39:59,081 INFO L226 Difference]: Without dead ends: 82 [2018-09-28 10:39:59,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:39:59,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-28 10:39:59,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-28 10:39:59,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-28 10:39:59,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-28 10:39:59,084 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-28 10:39:59,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:39:59,084 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-28 10:39:59,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-28 10:39:59,084 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-28 10:39:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-28 10:39:59,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:39:59,085 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1] [2018-09-28 10:39:59,085 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:39:59,085 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:39:59,085 INFO L82 PathProgramCache]: Analyzing trace with hash -718799327, now seen corresponding path program 79 times [2018-09-28 10:39:59,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:39:59,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:39:59,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:59,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:39:59,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:39:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:59,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:39:59,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:39:59,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:39:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:39:59,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:39:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:39:59,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:39:59,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-28 10:39:59,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-28 10:39:59,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-28 10:39:59,911 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:39:59,911 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-28 10:40:00,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:00,515 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-28 10:40:00,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-28 10:40:00,515 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-28 10:40:00,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:00,516 INFO L225 Difference]: With dead ends: 84 [2018-09-28 10:40:00,517 INFO L226 Difference]: Without dead ends: 83 [2018-09-28 10:40:00,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:00,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-28 10:40:00,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-28 10:40:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-28 10:40:00,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-28 10:40:00,519 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-28 10:40:00,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:00,520 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-28 10:40:00,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-28 10:40:00,520 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-28 10:40:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-28 10:40:00,520 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:00,520 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1] [2018-09-28 10:40:00,521 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:00,521 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:00,521 INFO L82 PathProgramCache]: Analyzing trace with hash -807942713, now seen corresponding path program 80 times [2018-09-28 10:40:00,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:00,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:00,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:00,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:00,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:00,960 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:00,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:00,968 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:01,013 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:01,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:01,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:01,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:01,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-28 10:40:01,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-28 10:40:01,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-28 10:40:01,241 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:01,241 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-09-28 10:40:01,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:01,667 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-28 10:40:01,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-28 10:40:01,668 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-09-28 10:40:01,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:01,669 INFO L225 Difference]: With dead ends: 85 [2018-09-28 10:40:01,669 INFO L226 Difference]: Without dead ends: 84 [2018-09-28 10:40:01,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:01,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-28 10:40:01,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-28 10:40:01,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-28 10:40:01,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-28 10:40:01,672 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-28 10:40:01,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:01,672 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-28 10:40:01,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-28 10:40:01,672 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-28 10:40:01,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-28 10:40:01,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:01,673 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1] [2018-09-28 10:40:01,674 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:01,674 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:01,674 INFO L82 PathProgramCache]: Analyzing trace with hash 723579617, now seen corresponding path program 81 times [2018-09-28 10:40:01,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:01,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:01,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:01,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:01,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:02,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:02,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:02,451 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:02,547 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-28 10:40:02,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:02,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:03,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:03,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-28 10:40:03,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-28 10:40:03,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-28 10:40:03,364 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:03,364 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-28 10:40:03,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:03,927 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-28 10:40:03,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-28 10:40:03,927 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-28 10:40:03,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:03,928 INFO L225 Difference]: With dead ends: 86 [2018-09-28 10:40:03,928 INFO L226 Difference]: Without dead ends: 85 [2018-09-28 10:40:03,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:03,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-28 10:40:03,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-28 10:40:03,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-28 10:40:03,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-28 10:40:03,932 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-28 10:40:03,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:03,932 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-28 10:40:03,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-28 10:40:03,932 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-28 10:40:03,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-28 10:40:03,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:03,933 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1] [2018-09-28 10:40:03,933 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:03,933 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:03,933 INFO L82 PathProgramCache]: Analyzing trace with hash 956131591, now seen corresponding path program 82 times [2018-09-28 10:40:03,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:03,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:03,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:03,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:03,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:04,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:04,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:04,402 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:04,448 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:04,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:04,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:04,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:04,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-28 10:40:04,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-28 10:40:04,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-28 10:40:04,664 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:04,664 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 85 states. [2018-09-28 10:40:05,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:05,291 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-28 10:40:05,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-28 10:40:05,292 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 84 [2018-09-28 10:40:05,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:05,293 INFO L225 Difference]: With dead ends: 87 [2018-09-28 10:40:05,293 INFO L226 Difference]: Without dead ends: 86 [2018-09-28 10:40:05,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:05,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-28 10:40:05,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-28 10:40:05,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-28 10:40:05,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-28 10:40:05,296 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-28 10:40:05,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:05,296 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-28 10:40:05,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-28 10:40:05,296 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-28 10:40:05,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-28 10:40:05,297 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:05,297 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1] [2018-09-28 10:40:05,297 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:05,297 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:05,298 INFO L82 PathProgramCache]: Analyzing trace with hash -424691807, now seen corresponding path program 83 times [2018-09-28 10:40:05,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:05,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:05,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:05,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:05,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:05,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:05,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:05,768 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:05,849 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-28 10:40:05,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:05,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:06,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:06,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-28 10:40:06,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-28 10:40:06,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-28 10:40:06,048 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:06,048 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-28 10:40:06,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:06,646 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-28 10:40:06,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-28 10:40:06,647 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-28 10:40:06,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:06,648 INFO L225 Difference]: With dead ends: 88 [2018-09-28 10:40:06,648 INFO L226 Difference]: Without dead ends: 87 [2018-09-28 10:40:06,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:06,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-28 10:40:06,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-28 10:40:06,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-28 10:40:06,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-28 10:40:06,650 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-28 10:40:06,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:06,650 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-28 10:40:06,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-28 10:40:06,650 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-28 10:40:06,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-28 10:40:06,650 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:06,650 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1] [2018-09-28 10:40:06,651 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:06,651 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:06,651 INFO L82 PathProgramCache]: Analyzing trace with hash -280544185, now seen corresponding path program 84 times [2018-09-28 10:40:06,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:06,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:06,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:06,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:06,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:07,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:07,295 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:07,304 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:07,385 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-28 10:40:07,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:07,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:07,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:07,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-28 10:40:07,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-28 10:40:07,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-28 10:40:07,699 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:07,699 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 87 states. [2018-09-28 10:40:08,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:08,996 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-28 10:40:08,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-28 10:40:08,996 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 86 [2018-09-28 10:40:08,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:08,997 INFO L225 Difference]: With dead ends: 89 [2018-09-28 10:40:08,997 INFO L226 Difference]: Without dead ends: 88 [2018-09-28 10:40:08,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:08,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-28 10:40:08,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-28 10:40:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-28 10:40:09,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-28 10:40:09,000 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-28 10:40:09,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:09,000 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-28 10:40:09,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-28 10:40:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-28 10:40:09,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-28 10:40:09,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:09,001 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1] [2018-09-28 10:40:09,001 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:09,002 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:09,002 INFO L82 PathProgramCache]: Analyzing trace with hash -106935199, now seen corresponding path program 85 times [2018-09-28 10:40:09,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:09,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:09,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:09,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:09,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:09,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:09,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:09,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:09,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:09,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:09,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-28 10:40:09,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-28 10:40:09,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-28 10:40:09,828 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:09,829 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-28 10:40:10,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:10,515 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-28 10:40:10,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-28 10:40:10,516 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-28 10:40:10,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:10,517 INFO L225 Difference]: With dead ends: 90 [2018-09-28 10:40:10,517 INFO L226 Difference]: Without dead ends: 89 [2018-09-28 10:40:10,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:10,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-28 10:40:10,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-28 10:40:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-28 10:40:10,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-28 10:40:10,521 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-28 10:40:10,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:10,521 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-28 10:40:10,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-28 10:40:10,521 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-28 10:40:10,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-28 10:40:10,522 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:10,522 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1] [2018-09-28 10:40:10,522 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:10,522 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:10,522 INFO L82 PathProgramCache]: Analyzing trace with hash 979976071, now seen corresponding path program 86 times [2018-09-28 10:40:10,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:10,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:10,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:10,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:10,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:10,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:10,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:10,990 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:11,039 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:11,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:11,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:11,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:11,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-28 10:40:11,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-28 10:40:11,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-28 10:40:11,234 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:11,235 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 89 states. [2018-09-28 10:40:11,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:11,920 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-28 10:40:11,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-28 10:40:11,920 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 88 [2018-09-28 10:40:11,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:11,921 INFO L225 Difference]: With dead ends: 91 [2018-09-28 10:40:11,921 INFO L226 Difference]: Without dead ends: 90 [2018-09-28 10:40:11,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:11,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-28 10:40:11,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-28 10:40:11,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-28 10:40:11,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-28 10:40:11,924 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-28 10:40:11,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:11,925 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-28 10:40:11,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-28 10:40:11,925 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-28 10:40:11,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-28 10:40:11,925 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:11,925 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1] [2018-09-28 10:40:11,926 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:11,926 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:11,926 INFO L82 PathProgramCache]: Analyzing trace with hash 314487073, now seen corresponding path program 87 times [2018-09-28 10:40:11,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:11,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:11,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:11,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:11,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:12,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:12,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:12,585 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:12,669 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-28 10:40:12,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:12,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:12,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:12,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-28 10:40:12,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-28 10:40:12,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-28 10:40:12,995 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:12,995 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-28 10:40:13,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:13,710 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-28 10:40:13,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-28 10:40:13,710 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-28 10:40:13,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:13,711 INFO L225 Difference]: With dead ends: 92 [2018-09-28 10:40:13,711 INFO L226 Difference]: Without dead ends: 91 [2018-09-28 10:40:13,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:13,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-28 10:40:13,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-28 10:40:13,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-28 10:40:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-28 10:40:13,714 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-28 10:40:13,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:13,714 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-28 10:40:13,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-28 10:40:13,714 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-28 10:40:13,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-28 10:40:13,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:13,715 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1] [2018-09-28 10:40:13,715 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:13,715 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:13,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164615, now seen corresponding path program 88 times [2018-09-28 10:40:13,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:13,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:13,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:13,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:13,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:14,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:14,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:14,169 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:14,224 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:14,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:14,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:14,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:14,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-28 10:40:14,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-28 10:40:14,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-28 10:40:14,422 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:14,422 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 91 states. [2018-09-28 10:40:15,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:15,178 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-28 10:40:15,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-28 10:40:15,179 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 90 [2018-09-28 10:40:15,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:15,179 INFO L225 Difference]: With dead ends: 93 [2018-09-28 10:40:15,179 INFO L226 Difference]: Without dead ends: 92 [2018-09-28 10:40:15,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:15,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-28 10:40:15,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-28 10:40:15,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-28 10:40:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-28 10:40:15,181 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-28 10:40:15,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:15,182 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-28 10:40:15,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-28 10:40:15,182 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-28 10:40:15,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-28 10:40:15,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:15,182 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1] [2018-09-28 10:40:15,182 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:15,183 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:15,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364641, now seen corresponding path program 89 times [2018-09-28 10:40:15,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:15,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:15,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:15,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:15,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:15,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:15,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:15,698 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:15,779 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-28 10:40:15,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:15,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:15,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:15,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-28 10:40:15,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-28 10:40:15,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-28 10:40:15,980 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:15,980 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-28 10:40:16,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:16,824 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-28 10:40:16,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-28 10:40:16,824 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-28 10:40:16,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:16,825 INFO L225 Difference]: With dead ends: 94 [2018-09-28 10:40:16,825 INFO L226 Difference]: Without dead ends: 93 [2018-09-28 10:40:16,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:16,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-28 10:40:16,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-28 10:40:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-28 10:40:16,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-28 10:40:16,827 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-28 10:40:16,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:16,827 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-28 10:40:16,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-28 10:40:16,827 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-28 10:40:16,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-28 10:40:16,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:16,828 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1] [2018-09-28 10:40:16,828 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:16,828 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:16,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663559, now seen corresponding path program 90 times [2018-09-28 10:40:16,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:16,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:16,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:16,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:16,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:17,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:17,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:17,306 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:17,461 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-28 10:40:17,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:17,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:17,672 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:17,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-28 10:40:17,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-28 10:40:17,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-28 10:40:17,674 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:17,674 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 93 states. [2018-09-28 10:40:18,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:18,662 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-28 10:40:18,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-28 10:40:18,662 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 92 [2018-09-28 10:40:18,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:18,663 INFO L225 Difference]: With dead ends: 95 [2018-09-28 10:40:18,663 INFO L226 Difference]: Without dead ends: 94 [2018-09-28 10:40:18,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:18,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-28 10:40:18,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-28 10:40:18,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-28 10:40:18,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-28 10:40:18,666 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-28 10:40:18,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:18,666 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-28 10:40:18,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-28 10:40:18,666 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-28 10:40:18,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-28 10:40:18,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:18,667 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1] [2018-09-28 10:40:18,667 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:18,667 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:18,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930017, now seen corresponding path program 91 times [2018-09-28 10:40:18,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:18,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:18,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:18,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:18,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:19,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:19,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:19,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:19,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:19,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:19,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-28 10:40:19,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-28 10:40:19,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-28 10:40:19,396 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:19,396 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-28 10:40:20,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:20,180 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-28 10:40:20,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-28 10:40:20,180 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-28 10:40:20,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:20,181 INFO L225 Difference]: With dead ends: 96 [2018-09-28 10:40:20,181 INFO L226 Difference]: Without dead ends: 95 [2018-09-28 10:40:20,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:20,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-28 10:40:20,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-28 10:40:20,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-28 10:40:20,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-28 10:40:20,184 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-28 10:40:20,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:20,185 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-28 10:40:20,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-28 10:40:20,185 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-28 10:40:20,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-28 10:40:20,185 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:20,185 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1] [2018-09-28 10:40:20,186 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:20,186 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:20,186 INFO L82 PathProgramCache]: Analyzing trace with hash 854092103, now seen corresponding path program 92 times [2018-09-28 10:40:20,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:20,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:20,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:20,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:20,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:20,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:20,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:20,678 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:20,729 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:20,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:20,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:20,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:20,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-28 10:40:20,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-28 10:40:20,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-28 10:40:20,942 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:20,942 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 95 states. [2018-09-28 10:40:21,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:21,520 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-28 10:40:21,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-28 10:40:21,520 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 94 [2018-09-28 10:40:21,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:21,521 INFO L225 Difference]: With dead ends: 97 [2018-09-28 10:40:21,521 INFO L226 Difference]: Without dead ends: 96 [2018-09-28 10:40:21,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:21,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-28 10:40:21,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-28 10:40:21,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-28 10:40:21,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-28 10:40:21,523 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-28 10:40:21,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:21,523 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-28 10:40:21,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-28 10:40:21,524 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-28 10:40:21,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-28 10:40:21,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:21,524 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1] [2018-09-28 10:40:21,524 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:21,524 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:21,525 INFO L82 PathProgramCache]: Analyzing trace with hash 707051361, now seen corresponding path program 93 times [2018-09-28 10:40:21,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:21,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:21,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:21,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:21,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:22,037 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:22,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:22,045 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:22,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-28 10:40:22,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:22,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:22,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:22,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-28 10:40:22,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-28 10:40:22,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-28 10:40:22,348 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:22,348 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-28 10:40:23,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:23,220 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-28 10:40:23,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-28 10:40:23,220 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-28 10:40:23,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:23,221 INFO L225 Difference]: With dead ends: 98 [2018-09-28 10:40:23,221 INFO L226 Difference]: Without dead ends: 97 [2018-09-28 10:40:23,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:23,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-28 10:40:23,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-28 10:40:23,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-28 10:40:23,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-28 10:40:23,224 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-28 10:40:23,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:23,224 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-28 10:40:23,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-28 10:40:23,224 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-28 10:40:23,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-28 10:40:23,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:23,225 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1] [2018-09-28 10:40:23,225 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:23,225 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:23,226 INFO L82 PathProgramCache]: Analyzing trace with hash 443755655, now seen corresponding path program 94 times [2018-09-28 10:40:23,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:23,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:23,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:23,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:23,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:23,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:23,725 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:23,733 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:23,788 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:23,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:23,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:23,998 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:23,998 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-28 10:40:23,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-28 10:40:24,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-28 10:40:24,000 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:24,000 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 97 states. [2018-09-28 10:40:24,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:24,845 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-28 10:40:24,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-28 10:40:24,845 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 96 [2018-09-28 10:40:24,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:24,846 INFO L225 Difference]: With dead ends: 99 [2018-09-28 10:40:24,846 INFO L226 Difference]: Without dead ends: 98 [2018-09-28 10:40:24,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:24,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-28 10:40:24,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-28 10:40:24,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-28 10:40:24,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-28 10:40:24,849 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-28 10:40:24,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:24,850 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-28 10:40:24,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-28 10:40:24,850 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-28 10:40:24,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-28 10:40:24,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:24,850 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1] [2018-09-28 10:40:24,851 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:24,851 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:24,851 INFO L82 PathProgramCache]: Analyzing trace with hash 871523361, now seen corresponding path program 95 times [2018-09-28 10:40:24,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:24,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:24,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:24,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:24,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:25,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:25,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:25,367 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:40:25,458 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-28 10:40:25,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:25,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:25,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:25,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:25,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-28 10:40:25,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-28 10:40:25,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-28 10:40:25,727 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:25,727 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-28 10:40:26,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:26,428 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-28 10:40:26,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-28 10:40:26,429 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-28 10:40:26,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:26,429 INFO L225 Difference]: With dead ends: 100 [2018-09-28 10:40:26,429 INFO L226 Difference]: Without dead ends: 99 [2018-09-28 10:40:26,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:26,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-28 10:40:26,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-28 10:40:26,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-28 10:40:26,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-28 10:40:26,432 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-28 10:40:26,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:26,432 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-28 10:40:26,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-28 10:40:26,432 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-28 10:40:26,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-28 10:40:26,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:26,433 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1] [2018-09-28 10:40:26,433 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:26,433 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:26,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420359, now seen corresponding path program 96 times [2018-09-28 10:40:26,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:26,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:26,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:26,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:26,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:27,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:27,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:27,051 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:40:27,154 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-28 10:40:27,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:27,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:27,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:27,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-28 10:40:27,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-28 10:40:27,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-28 10:40:27,365 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:27,365 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 99 states. [2018-09-28 10:40:28,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:28,025 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-28 10:40:28,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-28 10:40:28,025 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 98 [2018-09-28 10:40:28,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:28,026 INFO L225 Difference]: With dead ends: 101 [2018-09-28 10:40:28,026 INFO L226 Difference]: Without dead ends: 100 [2018-09-28 10:40:28,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:28,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-28 10:40:28,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-28 10:40:28,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-28 10:40:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-28 10:40:28,028 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-28 10:40:28,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:28,028 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-28 10:40:28,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-28 10:40:28,028 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-28 10:40:28,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-28 10:40:28,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:28,029 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1] [2018-09-28 10:40:28,029 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:28,029 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:28,029 INFO L82 PathProgramCache]: Analyzing trace with hash 15325409, now seen corresponding path program 97 times [2018-09-28 10:40:28,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:28,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:28,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:28,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:28,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:28,628 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:28,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:28,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:28,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:28,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:28,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-28 10:40:28,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-28 10:40:28,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-28 10:40:28,907 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:28,907 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-28 10:40:29,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:29,847 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-28 10:40:29,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-28 10:40:29,848 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-28 10:40:29,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:29,848 INFO L225 Difference]: With dead ends: 102 [2018-09-28 10:40:29,849 INFO L226 Difference]: Without dead ends: 101 [2018-09-28 10:40:29,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:29,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-28 10:40:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-28 10:40:29,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-28 10:40:29,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-28 10:40:29,852 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-28 10:40:29,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:29,852 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-28 10:40:29,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-28 10:40:29,852 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-28 10:40:29,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-28 10:40:29,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:29,853 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1] [2018-09-28 10:40:29,853 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:29,853 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:29,853 INFO L82 PathProgramCache]: Analyzing trace with hash 475087623, now seen corresponding path program 98 times [2018-09-28 10:40:29,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:29,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:29,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:29,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:40:29,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:30,380 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:30,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:30,387 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:40:30,440 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:40:30,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:30,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:30,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:30,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-28 10:40:30,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-28 10:40:30,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-28 10:40:30,668 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:30,669 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 101 states. [2018-09-28 10:40:31,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:31,476 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-28 10:40:31,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-28 10:40:31,477 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 100 [2018-09-28 10:40:31,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:31,478 INFO L225 Difference]: With dead ends: 103 [2018-09-28 10:40:31,478 INFO L226 Difference]: Without dead ends: 102 [2018-09-28 10:40:31,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:31,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-28 10:40:31,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-28 10:40:31,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-28 10:40:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-28 10:40:31,481 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-28 10:40:31,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:31,482 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-28 10:40:31,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-28 10:40:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-28 10:40:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-28 10:40:31,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:31,483 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1] [2018-09-28 10:40:31,483 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:31,483 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:31,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814369, now seen corresponding path program 99 times [2018-09-28 10:40:31,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:31,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:31,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:31,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:31,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:32,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:32,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:32,025 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:40:32,124 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-28 10:40:32,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:32,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:32,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:32,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-28 10:40:32,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-28 10:40:32,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-28 10:40:32,346 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:32,346 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-28 10:40:33,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:40:33,383 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-28 10:40:33,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-28 10:40:33,383 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-28 10:40:33,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:40:33,384 INFO L225 Difference]: With dead ends: 104 [2018-09-28 10:40:33,384 INFO L226 Difference]: Without dead ends: 103 [2018-09-28 10:40:33,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:40:33,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-28 10:40:33,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-28 10:40:33,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-28 10:40:33,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-28 10:40:33,387 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-28 10:40:33,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:40:33,387 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-28 10:40:33,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-28 10:40:33,387 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-28 10:40:33,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-28 10:40:33,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:40:33,388 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1] [2018-09-28 10:40:33,388 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:40:33,388 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:40:33,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670535, now seen corresponding path program 100 times [2018-09-28 10:40:33,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:40:33,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:40:33,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:33,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:40:33,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:40:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:40:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:41,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:40:41,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:40:41,699 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:40:41,761 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:40:41,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:40:41,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:40:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:40:42,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:40:42,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-28 10:40:42,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-28 10:40:42,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-28 10:40:42,378 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:40:42,379 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 103 states. [2018-09-28 10:41:15,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:15,900 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-28 10:41:15,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-28 10:41:15,900 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 102 [2018-09-28 10:41:15,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:15,902 INFO L225 Difference]: With dead ends: 105 [2018-09-28 10:41:15,902 INFO L226 Difference]: Without dead ends: 104 [2018-09-28 10:41:15,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:15,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-28 10:41:15,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-28 10:41:15,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-28 10:41:15,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-28 10:41:15,908 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-28 10:41:15,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:15,908 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-28 10:41:15,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-28 10:41:15,909 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-28 10:41:15,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-28 10:41:15,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:41:15,909 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1] [2018-09-28 10:41:15,910 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:41:15,910 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:41:15,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080865, now seen corresponding path program 101 times [2018-09-28 10:41:15,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:41:15,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:41:15,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:15,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:41:15,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:41:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:41:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 5151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:41:17,798 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:41:17,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2018-09-28 10:41:17,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-28 10:41:17,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-28 10:41:17,801 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:41:17,801 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-28 10:41:18,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:41:18,755 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-28 10:41:18,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-28 10:41:18,756 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-28 10:41:18,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:41:18,756 INFO L225 Difference]: With dead ends: 104 [2018-09-28 10:41:18,756 INFO L226 Difference]: Without dead ends: 0 [2018-09-28 10:41:18,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:41:18,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-28 10:41:18,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-28 10:41:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-28 10:41:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-28 10:41:18,758 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2018-09-28 10:41:18,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:41:18,759 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-28 10:41:18,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-28 10:41:18,759 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-28 10:41:18,759 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-28 10:41:18,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-28 10:41:18,925 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 613 [2018-09-28 10:41:22,807 WARN L178 SmtUtils]: Spent 3.88 s on a formula simplification. DAG size of input: 613 DAG size of output: 610 [2018-09-28 10:41:22,816 INFO L426 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONASSERT(line 29) no Hoare annotation was computed. [2018-09-28 10:41:22,816 INFO L426 ceAbstractionStarter]: For program point mainENTRY(lines 17 31) no Hoare annotation was computed. [2018-09-28 10:41:22,816 INFO L426 ceAbstractionStarter]: For program point mainFINAL(lines 17 31) no Hoare annotation was computed. [2018-09-28 10:41:22,816 INFO L426 ceAbstractionStarter]: For program point mainEXIT(lines 17 31) no Hoare annotation was computed. [2018-09-28 10:41:22,818 INFO L422 ceAbstractionStarter]: At program point L24-1(lines 24 27) the Hoare annotation is: (or (and (<= 8 main_y) (<= main_y 8) (<= main_x 8) (<= 8 main_x)) (and (<= main_x 49) (<= main_y 49) (<= 49 main_x) (<= 49 main_y)) (and (<= 99 main_x) (<= main_y 99) (<= 99 main_y) (<= main_x 99)) (and (<= 42 main_x) (<= main_y 42) (<= main_x 42) (<= 42 main_y)) (and (<= 9 main_y) (<= 9 main_x) (<= main_x 9) (<= main_y 9)) (and (<= 59 main_x) (<= 59 main_y) (<= main_y 59) (<= main_x 59)) (and (<= 55 main_y) (<= main_y 55) (<= 55 main_x) (<= main_x 55)) (and (<= 74 main_x) (<= main_x 74) (<= 74 main_y) (<= main_y 74)) (and (<= main_x 97) (<= 97 main_y) (<= main_y 97) (<= 97 main_x)) (and (<= 12 main_x) (<= 12 main_y) (<= main_y 12) (<= main_x 12)) (and (<= main_x 65) (<= main_y 65) (<= 65 main_x) (<= 65 main_y)) (and (<= 32 main_x) (<= main_x 32) (<= 32 main_y) (<= main_y 32)) (and (<= main_y 73) (<= main_x 73) (<= 73 main_x) (<= 73 main_y)) (and (<= 6 main_x) (<= main_x 6) (<= 6 main_y) (<= main_y 6)) (and (<= 14 main_x) (<= 14 main_y) (<= main_y 14) (<= main_x 14)) (and (<= main_x 0) (<= 0 main_y) (<= 0 main_x) (<= main_y 0)) (and (<= main_y 44) (<= main_x 44) (<= 44 main_y) (<= 44 main_x)) (and (<= 38 main_x) (<= 38 main_y) (<= main_y 38) (<= main_x 38)) (and (<= 43 main_x) (<= main_x 43) (<= main_y 43) (<= 43 main_y)) (and (<= 21 main_y) (<= 21 main_x) (<= main_x 21) (<= main_y 21)) (and (<= 94 main_x) (<= 94 main_y) (<= main_x 94) (<= main_y 94)) (and (<= 52 main_x) (<= 52 main_y) (<= main_y 52) (<= main_x 52)) (and (<= main_y 46) (<= 46 main_x) (<= main_x 46) (<= 46 main_y)) (and (<= main_x 18) (<= 18 main_y) (<= 18 main_x) (<= main_y 18)) (<= 101 main_x) (and (<= 61 main_y) (<= main_x 61) (<= main_y 61) (<= 61 main_x)) (and (<= 88 main_y) (<= main_y 88) (<= 88 main_x) (<= main_x 88)) (and (<= 80 main_y) (<= main_x 80) (<= main_y 80) (<= 80 main_x)) (and (<= main_x 92) (<= 92 main_y) (<= main_y 92) (<= 92 main_x)) (and (<= 87 main_x) (<= main_x 87) (<= 87 main_y) (<= main_y 87)) (and (<= 35 main_y) (<= main_y 35) (<= main_x 35) (<= 35 main_x)) (and (<= 85 main_x) (<= main_x 85) (<= 85 main_y) (<= main_y 85)) (and (<= 63 main_x) (<= 63 main_y) (<= main_y 63) (<= main_x 63)) (and (<= 15 main_y) (<= main_y 15) (<= 15 main_x) (<= main_x 15)) (and (<= main_y 64) (<= 64 main_x) (<= main_x 64) (<= 64 main_y)) (and (<= 4 main_y) (<= main_y 4) (<= main_x 4) (<= 4 main_x)) (and (<= 47 main_x) (<= 47 main_y) (<= main_y 47) (<= main_x 47)) (and (<= 51 main_y) (<= main_x 51) (<= 51 main_x) (<= main_y 51)) (and (<= 54 main_y) (<= main_y 54) (<= 54 main_x) (<= main_x 54)) (and (<= main_x 33) (<= 33 main_x) (<= main_y 33) (<= 33 main_y)) (and (<= 37 main_x) (<= 37 main_y) (<= main_y 37) (<= main_x 37)) (and (<= 20 main_y) (<= 20 main_x) (<= main_y 20) (<= main_x 20)) (and (<= 26 main_y) (<= main_x 26) (<= 26 main_x) (<= main_y 26)) (and (<= 86 main_x) (<= 86 main_y) (<= main_x 86) (<= main_y 86)) (and (<= main_x 27) (<= main_y 27) (<= 27 main_y) (<= 27 main_x)) (and (<= main_y 95) (<= 95 main_x) (<= 95 main_y) (<= main_x 95)) (and (<= 1 main_x) (<= main_x 1) (<= main_y 1) (<= 1 main_y)) (and (<= main_x 56) (<= 56 main_x) (<= 56 main_y) (<= main_y 56)) (and (<= main_y 75) (<= main_x 75) (<= 75 main_y) (<= 75 main_x)) (and (<= 68 main_y) (<= main_x 68) (<= main_y 68) (<= 68 main_x)) (and (<= main_x 62) (<= 62 main_x) (<= 62 main_y) (<= main_y 62)) (and (<= main_y 78) (<= 78 main_x) (<= 78 main_y) (<= main_x 78)) (and (<= main_y 3) (<= 3 main_y) (<= 3 main_x) (<= main_x 3)) (and (<= main_x 25) (<= main_y 25) (<= 25 main_x) (<= 25 main_y)) (and (<= main_x 36) (<= main_y 36) (<= 36 main_x) (<= 36 main_y)) (and (<= 57 main_y) (<= main_x 57) (<= main_y 57) (<= 57 main_x)) (and (<= 5 main_x) (<= main_x 5) (<= main_y 5) (<= 5 main_y)) (and (<= 82 main_x) (<= 82 main_y) (<= main_x 82) (<= main_y 82)) (and (<= main_y 17) (<= 17 main_y) (<= 17 main_x) (<= main_x 17)) (and (<= main_y 83) (<= 83 main_x) (<= main_x 83) (<= 83 main_y)) (and (<= 77 main_x) (<= 77 main_y) (<= main_x 77) (<= main_y 77)) (and (<= 31 main_x) (<= 31 main_y) (<= main_y 31) (<= main_x 31)) (and (<= main_y 98) (<= main_x 98) (<= 98 main_y) (<= 98 main_x)) (and (<= 71 main_y) (<= 71 main_x) (<= main_y 71) (<= main_x 71)) (and (<= main_y 41) (<= 41 main_x) (<= 41 main_y) (<= main_x 41)) (and (<= 30 main_x) (<= 30 main_y) (<= main_x 30) (<= main_y 30)) (and (<= 24 main_y) (<= main_x 24) (<= main_y 24) (<= 24 main_x)) (and (<= main_y 50) (<= 50 main_y) (<= main_x 50) (<= 50 main_x)) (and (<= 84 main_y) (<= main_y 84) (<= main_x 84) (<= 84 main_x)) (and (<= main_y 93) (<= 93 main_y) (<= 93 main_x) (<= main_x 93)) (and (<= main_y 60) (<= main_x 60) (<= 60 main_y) (<= 60 main_x)) (and (<= 29 main_y) (<= main_x 29) (<= 29 main_x) (<= main_y 29)) (and (<= main_y 40) (<= main_x 40) (<= 40 main_y) (<= 40 main_x)) (and (<= main_y 53) (<= 53 main_y) (<= main_x 53) (<= 53 main_x)) (and (<= main_y 58) (<= 58 main_y) (<= 58 main_x) (<= main_x 58)) (and (<= 67 main_x) (<= 67 main_y) (<= main_y 67) (<= main_x 67)) (and (<= main_y 22) (<= main_x 22) (<= 22 main_x) (<= 22 main_y)) (and (<= 39 main_y) (<= 39 main_x) (<= main_x 39) (<= main_y 39)) (and (<= 13 main_x) (<= main_x 13) (<= main_y 13) (<= 13 main_y)) (and (<= main_y 100) (< 99 main_y) (<= 100 main_x)) (and (<= main_y 79) (<= 79 main_x) (<= main_x 79) (<= 79 main_y)) (and (<= 69 main_x) (<= main_x 69) (<= 69 main_y) (<= main_y 69)) (and (<= 81 main_x) (<= main_y 81) (<= main_x 81) (<= 81 main_y)) (and (<= 28 main_y) (<= main_x 28) (<= 28 main_x) (<= main_y 28)) (and (<= main_x 91) (<= 91 main_y) (<= 91 main_x) (<= main_y 91)) (and (<= main_y 66) (<= main_x 66) (<= 66 main_x) (<= 66 main_y)) (and (<= 34 main_x) (<= main_y 34) (<= main_x 34) (<= 34 main_y)) (and (<= 89 main_x) (<= main_y 89) (<= main_x 89) (<= 89 main_y)) (and (<= 10 main_y) (<= main_x 10) (<= main_y 10) (<= 10 main_x)) (and (<= main_x 16) (<= main_y 16) (<= 16 main_x) (<= 16 main_y)) (and (<= 2 main_y) (<= 2 main_x) (<= main_y 2) (<= main_x 2)) (and (<= main_x 7) (<= 7 main_y) (<= 7 main_x) (<= main_y 7)) (and (<= main_x 72) (<= 72 main_x) (<= 72 main_y) (<= main_y 72)) (and (<= 48 main_x) (<= main_x 48) (<= main_y 48) (<= 48 main_y)) (and (<= main_y 76) (<= main_x 76) (<= 76 main_y) (<= 76 main_x)) (and (<= 96 main_x) (<= main_y 96) (<= 96 main_y) (<= main_x 96)) (and (<= 45 main_x) (<= 45 main_y) (<= main_y 45) (<= main_x 45)) (and (<= 11 main_x) (<= main_x 11) (<= 11 main_y) (<= main_y 11)) (and (<= 90 main_x) (<= main_y 90) (<= 90 main_y) (<= main_x 90)) (and (<= main_x 19) (<= main_y 19) (<= 19 main_x) (<= 19 main_y)) (and (<= main_x 70) (<= main_y 70) (<= 70 main_x) (<= 70 main_y)) (and (<= 23 main_x) (<= 23 main_y) (<= main_y 23) (<= main_x 23))) [2018-09-28 10:41:22,852 INFO L202 PluginConnector]: Adding new model HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:41:22 BoogieIcfgContainer [2018-09-28 10:41:22,852 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:41:22,853 INFO L168 Benchmark]: Toolchain (without parser) took 153239.76 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 317.2 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 413.3 MB). Peak memory consumption was 730.5 MB. Max. memory is 7.1 GB. [2018-09-28 10:41:22,855 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:41:22,855 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.53 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:41:22,855 INFO L168 Benchmark]: Boogie Preprocessor took 25.86 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:41:22,856 INFO L168 Benchmark]: RCFGBuilder took 287.94 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:41:22,857 INFO L168 Benchmark]: TraceAbstraction took 152875.99 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 317.2 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 392.1 MB). Peak memory consumption was 709.3 MB. Max. memory is 7.1 GB. [2018-09-28 10:41:22,860 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.53 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.86 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 287.94 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 152875.99 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 317.2 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 392.1 MB). Peak memory consumption was 709.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 29]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((8 <= y && y <= 8) && x <= 8) && 8 <= x) || (((x <= 49 && y <= 49) && 49 <= x) && 49 <= y)) || (((99 <= x && y <= 99) && 99 <= y) && x <= 99)) || (((42 <= x && y <= 42) && x <= 42) && 42 <= y)) || (((9 <= y && 9 <= x) && x <= 9) && y <= 9)) || (((59 <= x && 59 <= y) && y <= 59) && x <= 59)) || (((55 <= y && y <= 55) && 55 <= x) && x <= 55)) || (((74 <= x && x <= 74) && 74 <= y) && y <= 74)) || (((x <= 97 && 97 <= y) && y <= 97) && 97 <= x)) || (((12 <= x && 12 <= y) && y <= 12) && x <= 12)) || (((x <= 65 && y <= 65) && 65 <= x) && 65 <= y)) || (((32 <= x && x <= 32) && 32 <= y) && y <= 32)) || (((y <= 73 && x <= 73) && 73 <= x) && 73 <= y)) || (((6 <= x && x <= 6) && 6 <= y) && y <= 6)) || (((14 <= x && 14 <= y) && y <= 14) && x <= 14)) || (((x <= 0 && 0 <= y) && 0 <= x) && y <= 0)) || (((y <= 44 && x <= 44) && 44 <= y) && 44 <= x)) || (((38 <= x && 38 <= y) && y <= 38) && x <= 38)) || (((43 <= x && x <= 43) && y <= 43) && 43 <= y)) || (((21 <= y && 21 <= x) && x <= 21) && y <= 21)) || (((94 <= x && 94 <= y) && x <= 94) && y <= 94)) || (((52 <= x && 52 <= y) && y <= 52) && x <= 52)) || (((y <= 46 && 46 <= x) && x <= 46) && 46 <= y)) || (((x <= 18 && 18 <= y) && 18 <= x) && y <= 18)) || 101 <= x) || (((61 <= y && x <= 61) && y <= 61) && 61 <= x)) || (((88 <= y && y <= 88) && 88 <= x) && x <= 88)) || (((80 <= y && x <= 80) && y <= 80) && 80 <= x)) || (((x <= 92 && 92 <= y) && y <= 92) && 92 <= x)) || (((87 <= x && x <= 87) && 87 <= y) && y <= 87)) || (((35 <= y && y <= 35) && x <= 35) && 35 <= x)) || (((85 <= x && x <= 85) && 85 <= y) && y <= 85)) || (((63 <= x && 63 <= y) && y <= 63) && x <= 63)) || (((15 <= y && y <= 15) && 15 <= x) && x <= 15)) || (((y <= 64 && 64 <= x) && x <= 64) && 64 <= y)) || (((4 <= y && y <= 4) && x <= 4) && 4 <= x)) || (((47 <= x && 47 <= y) && y <= 47) && x <= 47)) || (((51 <= y && x <= 51) && 51 <= x) && y <= 51)) || (((54 <= y && y <= 54) && 54 <= x) && x <= 54)) || (((x <= 33 && 33 <= x) && y <= 33) && 33 <= y)) || (((37 <= x && 37 <= y) && y <= 37) && x <= 37)) || (((20 <= y && 20 <= x) && y <= 20) && x <= 20)) || (((26 <= y && x <= 26) && 26 <= x) && y <= 26)) || (((86 <= x && 86 <= y) && x <= 86) && y <= 86)) || (((x <= 27 && y <= 27) && 27 <= y) && 27 <= x)) || (((y <= 95 && 95 <= x) && 95 <= y) && x <= 95)) || (((1 <= x && x <= 1) && y <= 1) && 1 <= y)) || (((x <= 56 && 56 <= x) && 56 <= y) && y <= 56)) || (((y <= 75 && x <= 75) && 75 <= y) && 75 <= x)) || (((68 <= y && x <= 68) && y <= 68) && 68 <= x)) || (((x <= 62 && 62 <= x) && 62 <= y) && y <= 62)) || (((y <= 78 && 78 <= x) && 78 <= y) && x <= 78)) || (((y <= 3 && 3 <= y) && 3 <= x) && x <= 3)) || (((x <= 25 && y <= 25) && 25 <= x) && 25 <= y)) || (((x <= 36 && y <= 36) && 36 <= x) && 36 <= y)) || (((57 <= y && x <= 57) && y <= 57) && 57 <= x)) || (((5 <= x && x <= 5) && y <= 5) && 5 <= y)) || (((82 <= x && 82 <= y) && x <= 82) && y <= 82)) || (((y <= 17 && 17 <= y) && 17 <= x) && x <= 17)) || (((y <= 83 && 83 <= x) && x <= 83) && 83 <= y)) || (((77 <= x && 77 <= y) && x <= 77) && y <= 77)) || (((31 <= x && 31 <= y) && y <= 31) && x <= 31)) || (((y <= 98 && x <= 98) && 98 <= y) && 98 <= x)) || (((71 <= y && 71 <= x) && y <= 71) && x <= 71)) || (((y <= 41 && 41 <= x) && 41 <= y) && x <= 41)) || (((30 <= x && 30 <= y) && x <= 30) && y <= 30)) || (((24 <= y && x <= 24) && y <= 24) && 24 <= x)) || (((y <= 50 && 50 <= y) && x <= 50) && 50 <= x)) || (((84 <= y && y <= 84) && x <= 84) && 84 <= x)) || (((y <= 93 && 93 <= y) && 93 <= x) && x <= 93)) || (((y <= 60 && x <= 60) && 60 <= y) && 60 <= x)) || (((29 <= y && x <= 29) && 29 <= x) && y <= 29)) || (((y <= 40 && x <= 40) && 40 <= y) && 40 <= x)) || (((y <= 53 && 53 <= y) && x <= 53) && 53 <= x)) || (((y <= 58 && 58 <= y) && 58 <= x) && x <= 58)) || (((67 <= x && 67 <= y) && y <= 67) && x <= 67)) || (((y <= 22 && x <= 22) && 22 <= x) && 22 <= y)) || (((39 <= y && 39 <= x) && x <= 39) && y <= 39)) || (((13 <= x && x <= 13) && y <= 13) && 13 <= y)) || ((y <= 100 && 99 < y) && 100 <= x)) || (((y <= 79 && 79 <= x) && x <= 79) && 79 <= y)) || (((69 <= x && x <= 69) && 69 <= y) && y <= 69)) || (((81 <= x && y <= 81) && x <= 81) && 81 <= y)) || (((28 <= y && x <= 28) && 28 <= x) && y <= 28)) || (((x <= 91 && 91 <= y) && 91 <= x) && y <= 91)) || (((y <= 66 && x <= 66) && 66 <= x) && 66 <= y)) || (((34 <= x && y <= 34) && x <= 34) && 34 <= y)) || (((89 <= x && y <= 89) && x <= 89) && 89 <= y)) || (((10 <= y && x <= 10) && y <= 10) && 10 <= x)) || (((x <= 16 && y <= 16) && 16 <= x) && 16 <= y)) || (((2 <= y && 2 <= x) && y <= 2) && x <= 2)) || (((x <= 7 && 7 <= y) && 7 <= x) && y <= 7)) || (((x <= 72 && 72 <= x) && 72 <= y) && y <= 72)) || (((48 <= x && x <= 48) && y <= 48) && 48 <= y)) || (((y <= 76 && x <= 76) && 76 <= y) && 76 <= x)) || (((96 <= x && y <= 96) && 96 <= y) && x <= 96)) || (((45 <= x && 45 <= y) && y <= 45) && x <= 45)) || (((11 <= x && x <= 11) && 11 <= y) && y <= 11)) || (((90 <= x && y <= 90) && 90 <= y) && x <= 90)) || (((x <= 19 && y <= 19) && 19 <= x) && 19 <= y)) || (((x <= 70 && y <= 70) && 70 <= x) && 70 <= y)) || (((23 <= x && 23 <= y) && y <= 23) && x <= 23) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. SAFE Result, 152.7s OverallTime, 102 OverallIterations, 101 TraceHistogramMax, 75.7s AutomataDifference, 0.0s DeadEndRemovalTime, 4.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 204 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 19537 SolverSat, 150 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10403 GetRequests, 5148 SyntacticMatches, 2 SemanticMatches, 5253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=101, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 102 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 102 NumberOfFragments, 1314 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 1 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 3.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 4.9s SatisfiabilityAnalysisTime, 62.5s InterpolantComputationTime, 10605 NumberOfCodeBlocks, 10605 NumberOfCodeBlocksAsserted, 1494 NumberOfCheckSat, 10403 ConstructedInterpolants, 0 QuantifiedInterpolants, 2205739 SizeOfPredicates, 0 NumberOfNonLiveVariables, 21100 ConjunctsInSsa, 5351 ConjunctsInUnsatCore, 202 InterpolantComputations, 2 PerfectInterpolantSequences, 5151/348551 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEquality-Safe.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-41-22-878.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEquality-Safe.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-41-22-878.csv Received shutdown request...