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/Luxembourg-sophisticated.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:56:17,550 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:56:17,553 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:56:17,568 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:56:17,569 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:56:17,569 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:56:17,570 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:56:17,572 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:56:17,574 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:56:17,575 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:56:17,576 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-26 21:56:17,576 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-26 21:56:17,577 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-26 21:56:17,578 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-26 21:56:17,579 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-26 21:56:17,580 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-26 21:56:17,580 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-26 21:56:17,582 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-26 21:56:17,584 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-26 21:56:17,586 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-26 21:56:17,587 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-26 21:56:17,588 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-26 21:56:17,591 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-26 21:56:17,599 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 [2018-09-26 21:56:17,614 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:56:17,615 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:56:17,615 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:56:17,616 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:56:17,616 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:56:17,616 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:56:17,617 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:56:17,617 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:56:17,617 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:56:17,617 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:56:17,617 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:56:17,618 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:56:17,618 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:56:17,618 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:56:17,618 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:56:17,618 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:56:17,619 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:56:17,619 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:56:17,619 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:56:17,619 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:56:17,619 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:56:17,619 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:56:17,620 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:56:17,620 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:56:17,620 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:56:17,620 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:56:17,621 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:56:17,621 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:56:17,621 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:56:17,621 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:56:17,621 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-26 21:56:17,675 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:56:17,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:56:17,691 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:56:17,692 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:56:17,693 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:56:17,694 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl [2018-09-26 21:56:17,694 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl' [2018-09-26 21:56:17,738 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:56:17,741 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:56:17,742 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:56:17,742 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:56:17,742 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:56:17,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:56:17" (1/1) ... [2018-09-26 21:56:17,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:56:17" (1/1) ... [2018-09-26 21:56:17,781 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-26 21:56:17,781 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-26 21:56:17,782 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-26 21:56:17,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:56:17,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:56:17,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:56:17,785 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:56:17,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:56:17" (1/1) ... [2018-09-26 21:56:17,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:56:17" (1/1) ... [2018-09-26 21:56:17,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:56:17" (1/1) ... [2018-09-26 21:56:17,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:56:17" (1/1) ... [2018-09-26 21:56:17,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:56:17" (1/1) ... [2018-09-26 21:56:17,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:56:17" (1/1) ... [2018-09-26 21:56:17,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:56:17" (1/1) ... [2018-09-26 21:56:17,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:56:17,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:56:17,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:56:17,812 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:56:17,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:56:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:56:17,898 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-26 21:56:17,898 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-26 21:56:17,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-26 21:56:18,082 INFO L343 CfgBuilder]: Using library mode [2018-09-26 21:56:18,082 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:56:18 BoogieIcfgContainer [2018-09-26 21:56:18,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:56:18,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:56:18,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:56:18,087 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:56:18,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:56:17" (1/2) ... [2018-09-26 21:56:18,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb8c52c and model type Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:56:18, skipping insertion in model container [2018-09-26 21:56:18,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:56:18" (2/2) ... [2018-09-26 21:56:18,091 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-sophisticated.bpl [2018-09-26 21:56:18,102 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:56:18,110 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:56:18,164 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:56:18,164 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:56:18,165 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:56:18,165 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:56:18,165 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:56:18,165 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:56:18,165 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:56:18,166 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:56:18,166 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:56:18,182 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-26 21:56:18,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-26 21:56:18,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:18,190 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-26 21:56:18,191 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:18,199 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:18,200 INFO L82 PathProgramCache]: Analyzing trace with hash 30240, now seen corresponding path program 1 times [2018-09-26 21:56:18,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:18,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:18,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:18,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:18,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:18,363 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:56:18,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:56:18,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:56:18,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:56:18,385 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:18,387 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-26 21:56:18,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:18,662 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2018-09-26 21:56:18,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:56:18,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-26 21:56:18,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:18,677 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:56:18,677 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:56:18,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:18,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:56:18,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-09-26 21:56:18,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-26 21:56:18,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-09-26 21:56:18,714 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-09-26 21:56:18,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:18,714 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-09-26 21:56:18,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:56:18,714 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-09-26 21:56:18,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:56:18,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:18,715 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-26 21:56:18,715 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:18,715 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:18,716 INFO L82 PathProgramCache]: Analyzing trace with hash 28755491, now seen corresponding path program 1 times [2018-09-26 21:56:18,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:18,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:18,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:18,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:18,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:18,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:18,773 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:18,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:18,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:18,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:18,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-26 21:56:18,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:56:18,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:56:18,903 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:18,903 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 4 states. [2018-09-26 21:56:18,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:18,980 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-09-26 21:56:18,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:56:18,981 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-26 21:56:18,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:18,981 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:56:18,982 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:56:18,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:18,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:56:18,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-09-26 21:56:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-26 21:56:18,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-26 21:56:18,987 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-26 21:56:18,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:18,987 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-26 21:56:18,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:56:18,987 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-26 21:56:18,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:56:18,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:18,988 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-26 21:56:18,989 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:18,989 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:18,989 INFO L82 PathProgramCache]: Analyzing trace with hash 28757413, now seen corresponding path program 1 times [2018-09-26 21:56:18,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:18,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:18,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:18,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:18,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:19,069 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:19,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:19,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:19,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:19,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:19,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-26 21:56:19,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:56:19,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:56:19,164 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:19,165 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-09-26 21:56:19,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:19,455 INFO L93 Difference]: Finished difference Result 12 states and 15 transitions. [2018-09-26 21:56:19,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:56:19,456 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-26 21:56:19,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:19,458 INFO L225 Difference]: With dead ends: 12 [2018-09-26 21:56:19,458 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 21:56:19,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:19,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 21:56:19,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2018-09-26 21:56:19,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-26 21:56:19,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-26 21:56:19,461 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-26 21:56:19,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:19,462 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-26 21:56:19,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:56:19,462 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-26 21:56:19,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:56:19,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:19,463 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-09-26 21:56:19,463 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:19,463 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:19,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1863917926, now seen corresponding path program 2 times [2018-09-26 21:56:19,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:19,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:19,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:19,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:19,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:19,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:19,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:19,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:19,551 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:19,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:19,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:19,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:19,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:56:19,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:56:19,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:56:19,660 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:19,660 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 5 states. [2018-09-26 21:56:19,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:19,761 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-09-26 21:56:19,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:56:19,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-26 21:56:19,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:19,762 INFO L225 Difference]: With dead ends: 14 [2018-09-26 21:56:19,763 INFO L226 Difference]: Without dead ends: 12 [2018-09-26 21:56:19,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:19,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-26 21:56:19,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-09-26 21:56:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:56:19,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-26 21:56:19,767 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-26 21:56:19,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:19,767 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-26 21:56:19,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:56:19,767 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-26 21:56:19,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:56:19,768 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:19,768 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-26 21:56:19,769 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:19,769 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:19,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1863919848, now seen corresponding path program 1 times [2018-09-26 21:56:19,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:19,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:19,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:19,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:19,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:19,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:19,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:19,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:19,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:19,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:19,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:56:19,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:56:19,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:56:19,960 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:19,960 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-09-26 21:56:20,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:20,036 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-09-26 21:56:20,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:56:20,037 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-26 21:56:20,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:20,038 INFO L225 Difference]: With dead ends: 14 [2018-09-26 21:56:20,038 INFO L226 Difference]: Without dead ends: 12 [2018-09-26 21:56:20,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:20,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-26 21:56:20,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-09-26 21:56:20,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:56:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-26 21:56:20,042 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-26 21:56:20,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:20,042 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-26 21:56:20,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:56:20,042 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-26 21:56:20,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:56:20,043 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:20,043 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-26 21:56:20,043 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:20,043 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:20,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1865764968, now seen corresponding path program 2 times [2018-09-26 21:56:20,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:20,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:20,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:20,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:20,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:20,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:20,100 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:20,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:20,116 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:20,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:20,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:20,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:20,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:56:20,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:56:20,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:56:20,167 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:20,167 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-09-26 21:56:20,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:20,546 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-09-26 21:56:20,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:56:20,547 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-26 21:56:20,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:20,548 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:56:20,548 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:56:20,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:56:20,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2018-09-26 21:56:20,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:56:20,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-26 21:56:20,561 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 7 [2018-09-26 21:56:20,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:20,561 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-26 21:56:20,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:56:20,561 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-26 21:56:20,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:56:20,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:20,563 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-09-26 21:56:20,563 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:20,564 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:20,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1865766890, now seen corresponding path program 2 times [2018-09-26 21:56:20,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:20,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:20,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:20,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:20,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:20,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:20,672 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:20,681 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:20,693 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:20,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:20,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:20,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:20,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:56:20,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:56:20,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:56:20,743 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:20,743 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 5 states. [2018-09-26 21:56:20,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:20,878 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2018-09-26 21:56:20,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:56:20,878 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-26 21:56:20,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:20,879 INFO L225 Difference]: With dead ends: 16 [2018-09-26 21:56:20,880 INFO L226 Difference]: Without dead ends: 14 [2018-09-26 21:56:20,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:20,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-26 21:56:20,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2018-09-26 21:56:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:56:20,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-26 21:56:20,885 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-26 21:56:20,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:20,885 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-26 21:56:20,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:56:20,885 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-26 21:56:20,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:56:20,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:20,886 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-09-26 21:56:20,886 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:20,886 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:20,886 INFO L82 PathProgramCache]: Analyzing trace with hash 223459305, now seen corresponding path program 3 times [2018-09-26 21:56:20,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:20,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:20,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:20,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:20,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:20,934 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:20,935 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:20,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:20,951 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:56:20,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:20,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:21,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:21,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:56:21,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:56:21,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:56:21,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:21,064 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 6 states. [2018-09-26 21:56:21,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:21,151 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-26 21:56:21,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:56:21,151 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-26 21:56:21,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:21,152 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:56:21,152 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:56:21,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:21,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:56:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-26 21:56:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:56:21,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-26 21:56:21,158 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-26 21:56:21,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:21,158 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-26 21:56:21,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:56:21,159 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-26 21:56:21,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:56:21,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:21,159 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-26 21:56:21,160 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:21,160 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:21,160 INFO L82 PathProgramCache]: Analyzing trace with hash 223461227, now seen corresponding path program 3 times [2018-09-26 21:56:21,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:21,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:21,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:21,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:21,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:21,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:21,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:21,237 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:21,264 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:56:21,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:21,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:21,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:21,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:56:21,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:56:21,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:56:21,345 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:21,345 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-26 21:56:21,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:21,477 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-09-26 21:56:21,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:56:21,478 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-26 21:56:21,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:21,479 INFO L225 Difference]: With dead ends: 18 [2018-09-26 21:56:21,479 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:56:21,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:21,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:56:21,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-09-26 21:56:21,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:56:21,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-26 21:56:21,483 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-26 21:56:21,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:21,483 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-26 21:56:21,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:56:21,484 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-26 21:56:21,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:56:21,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:21,484 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-26 21:56:21,485 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:21,485 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:21,485 INFO L82 PathProgramCache]: Analyzing trace with hash 225306347, now seen corresponding path program 4 times [2018-09-26 21:56:21,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:21,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:21,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:21,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:21,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:21,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:21,550 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:21,558 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:21,568 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:21,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:21,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:21,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:21,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:56:21,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:56:21,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:56:21,635 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:21,635 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-09-26 21:56:21,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:21,739 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-26 21:56:21,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:56:21,740 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-26 21:56:21,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:21,741 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:56:21,741 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:56:21,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:21,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:56:21,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-26 21:56:21,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:56:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-26 21:56:21,748 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-26 21:56:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:21,749 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-26 21:56:21,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:56:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-26 21:56:21,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:56:21,750 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:21,750 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-26 21:56:21,750 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:21,750 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:21,750 INFO L82 PathProgramCache]: Analyzing trace with hash 225308269, now seen corresponding path program 5 times [2018-09-26 21:56:21,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:21,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:21,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:21,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:21,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:21,796 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:21,796 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:21,806 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:21,812 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-26 21:56:21,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:21,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:21,900 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:21,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:56:21,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:56:21,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:56:21,900 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:21,901 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-26 21:56:21,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:21,999 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-09-26 21:56:21,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:56:22,000 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-26 21:56:22,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:22,001 INFO L225 Difference]: With dead ends: 18 [2018-09-26 21:56:22,001 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:56:22,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:22,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:56:22,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-09-26 21:56:22,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:56:22,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-26 21:56:22,007 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-26 21:56:22,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:22,007 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-26 21:56:22,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:56:22,007 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-26 21:56:22,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:56:22,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:22,008 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-26 21:56:22,008 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:22,009 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:22,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1998466667, now seen corresponding path program 6 times [2018-09-26 21:56:22,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:22,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:22,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:22,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:22,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:22,063 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:22,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:22,071 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:22,076 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-26 21:56:22,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:22,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:22,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:22,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:56:22,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:56:22,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:56:22,142 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:22,142 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-09-26 21:56:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:22,227 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-26 21:56:22,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:56:22,228 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-26 21:56:22,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:22,229 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:56:22,229 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:56:22,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:22,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:56:22,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2018-09-26 21:56:22,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:56:22,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-26 21:56:22,236 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-09-26 21:56:22,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:22,236 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-26 21:56:22,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:56:22,237 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-26 21:56:22,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:56:22,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:22,237 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-26 21:56:22,238 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:22,238 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:22,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1998468589, now seen corresponding path program 7 times [2018-09-26 21:56:22,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:22,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:22,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:22,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:22,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:22,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:22,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:22,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:22,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:22,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:22,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:56:22,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:56:22,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:56:22,483 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:22,483 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-09-26 21:56:22,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:22,599 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-26 21:56:22,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:56:22,599 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-26 21:56:22,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:22,600 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:56:22,600 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:56:22,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:22,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:56:22,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2018-09-26 21:56:22,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:56:22,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-26 21:56:22,606 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-26 21:56:22,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:22,606 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-26 21:56:22,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:56:22,607 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-26 21:56:22,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:56:22,607 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:22,607 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-26 21:56:22,608 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:22,608 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:22,608 INFO L82 PathProgramCache]: Analyzing trace with hash 2000313709, now seen corresponding path program 8 times [2018-09-26 21:56:22,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:22,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:22,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:22,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:22,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:22,648 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:22,648 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:22,656 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:22,664 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:22,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:22,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:22,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:22,709 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:56:22,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:56:22,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:56:22,709 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:22,709 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-26 21:56:22,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:22,822 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2018-09-26 21:56:22,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:56:22,828 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-26 21:56:22,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:22,828 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:56:22,828 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:56:22,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:22,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:56:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2018-09-26 21:56:22,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:56:22,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-26 21:56:22,834 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-09-26 21:56:22,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:22,835 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-26 21:56:22,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:56:22,835 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-26 21:56:22,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:56:22,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:22,836 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-09-26 21:56:22,836 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:22,836 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:22,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2000315631, now seen corresponding path program 3 times [2018-09-26 21:56:22,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:22,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:22,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:22,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:22,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:22,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:22,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:22,907 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:22,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:56:22,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:22,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:22,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:22,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:56:22,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:56:22,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:56:22,962 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:22,963 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-09-26 21:56:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:23,036 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2018-09-26 21:56:23,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:56:23,038 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-26 21:56:23,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:23,039 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:56:23,039 INFO L226 Difference]: Without dead ends: 18 [2018-09-26 21:56:23,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:23,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-26 21:56:23,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2018-09-26 21:56:23,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:56:23,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-26 21:56:23,045 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-26 21:56:23,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:23,045 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-26 21:56:23,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:56:23,046 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-26 21:56:23,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:56:23,046 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:23,046 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-09-26 21:56:23,046 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:23,047 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:23,047 INFO L82 PathProgramCache]: Analyzing trace with hash -4277844, now seen corresponding path program 4 times [2018-09-26 21:56:23,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:23,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:23,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:23,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:23,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:23,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:23,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:23,141 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:23,150 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:23,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:23,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:23,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:23,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:23,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:56:23,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:56:23,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:56:23,251 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:23,251 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 7 states. [2018-09-26 21:56:23,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:23,734 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-26 21:56:23,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:56:23,734 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:56:23,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:23,735 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:56:23,735 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:56:23,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:23,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:56:23,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-26 21:56:23,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:56:23,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:56:23,742 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-26 21:56:23,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:23,742 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:56:23,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:56:23,743 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:56:23,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:56:23,743 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:23,743 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-26 21:56:23,744 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:23,744 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:23,744 INFO L82 PathProgramCache]: Analyzing trace with hash -4275922, now seen corresponding path program 9 times [2018-09-26 21:56:23,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:23,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:23,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:23,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:23,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:23,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:23,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:23,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:23,828 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-26 21:56:23,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:23,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:23,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:23,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:56:23,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:56:23,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:56:23,887 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:23,887 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-26 21:56:24,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:24,009 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-26 21:56:24,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:56:24,010 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:56:24,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:24,011 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:56:24,011 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:56:24,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:24,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:56:24,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-09-26 21:56:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:56:24,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-26 21:56:24,037 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-26 21:56:24,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:24,037 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-26 21:56:24,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:56:24,038 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-26 21:56:24,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:56:24,040 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:24,040 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-26 21:56:24,040 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:24,040 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:24,040 INFO L82 PathProgramCache]: Analyzing trace with hash -2430802, now seen corresponding path program 10 times [2018-09-26 21:56:24,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:24,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:24,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:24,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:24,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:24,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:24,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:24,179 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:24,185 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:24,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:24,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:24,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:24,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:56:24,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:56:24,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:56:24,236 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:24,236 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-26 21:56:24,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:24,345 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-26 21:56:24,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:56:24,345 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:56:24,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:24,346 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:56:24,346 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:56:24,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:24,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:56:24,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-09-26 21:56:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:56:24,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:56:24,354 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-26 21:56:24,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:24,354 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:56:24,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:56:24,355 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:56:24,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:56:24,355 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:24,355 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-26 21:56:24,355 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:24,356 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:24,356 INFO L82 PathProgramCache]: Analyzing trace with hash -2428880, now seen corresponding path program 11 times [2018-09-26 21:56:24,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:24,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:24,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:24,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:24,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:24,452 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:24,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:24,462 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:24,468 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-26 21:56:24,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:24,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:24,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:24,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:56:24,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:56:24,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:56:24,572 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:24,572 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-26 21:56:24,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:24,796 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-09-26 21:56:24,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:56:24,796 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:56:24,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:24,797 INFO L225 Difference]: With dead ends: 22 [2018-09-26 21:56:24,797 INFO L226 Difference]: Without dead ends: 20 [2018-09-26 21:56:24,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:24,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-26 21:56:24,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-09-26 21:56:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:56:24,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-26 21:56:24,804 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-26 21:56:24,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:24,805 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-26 21:56:24,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:56:24,805 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-26 21:56:24,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:56:24,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:24,805 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-26 21:56:24,806 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:24,806 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:24,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1770729518, now seen corresponding path program 12 times [2018-09-26 21:56:24,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:24,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:24,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:24,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:24,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:24,857 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:24,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:24,865 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:24,881 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-26 21:56:24,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:24,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:24,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:24,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:24,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:56:24,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:56:24,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:56:24,936 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:24,936 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-09-26 21:56:25,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:25,129 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-26 21:56:25,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:56:25,129 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:56:25,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:25,130 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:56:25,130 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:56:25,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:25,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:56:25,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-26 21:56:25,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:56:25,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:56:25,139 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-26 21:56:25,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:25,139 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:56:25,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:56:25,139 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:56:25,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:56:25,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:25,140 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-26 21:56:25,140 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:25,140 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:25,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1770731440, now seen corresponding path program 13 times [2018-09-26 21:56:25,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:25,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:25,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:25,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:25,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:25,231 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:25,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:25,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:25,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:25,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:25,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:56:25,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:56:25,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:56:25,317 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:25,317 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-26 21:56:25,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:25,425 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-26 21:56:25,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:56:25,425 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:56:25,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:25,426 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:56:25,426 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:56:25,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:25,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:56:25,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-09-26 21:56:25,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:56:25,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-26 21:56:25,434 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-26 21:56:25,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:25,435 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-26 21:56:25,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:56:25,435 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-26 21:56:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:56:25,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:25,436 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-26 21:56:25,436 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:25,436 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:25,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1772576560, now seen corresponding path program 14 times [2018-09-26 21:56:25,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:25,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:25,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:25,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:25,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:25,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:25,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:25,486 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:25,490 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:25,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:25,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:25,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:25,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:56:25,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:56:25,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:56:25,541 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:25,541 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-26 21:56:25,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:25,832 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-26 21:56:25,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:56:25,835 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:56:25,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:25,836 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:56:25,836 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:56:25,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:25,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:56:25,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-09-26 21:56:25,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:56:25,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:56:25,843 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-26 21:56:25,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:25,843 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:56:25,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:56:25,844 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:56:25,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:56:25,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:25,844 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-26 21:56:25,844 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:25,845 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:25,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578482, now seen corresponding path program 15 times [2018-09-26 21:56:25,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:25,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:25,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:25,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:25,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:25,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:25,943 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:25,951 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:25,959 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-26 21:56:25,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:25,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:26,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:26,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:56:26,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:56:26,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:56:26,002 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:26,002 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-26 21:56:26,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:26,141 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-09-26 21:56:26,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:56:26,141 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:56:26,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:26,142 INFO L225 Difference]: With dead ends: 22 [2018-09-26 21:56:26,142 INFO L226 Difference]: Without dead ends: 20 [2018-09-26 21:56:26,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:26,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-26 21:56:26,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-09-26 21:56:26,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:56:26,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-26 21:56:26,150 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-26 21:56:26,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:26,150 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-26 21:56:26,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:56:26,150 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-26 21:56:26,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:56:26,151 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:26,151 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-26 21:56:26,151 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:26,151 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:26,151 INFO L82 PathProgramCache]: Analyzing trace with hash 675780526, now seen corresponding path program 16 times [2018-09-26 21:56:26,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:26,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:26,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:26,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:26,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:26,309 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:26,309 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:26,321 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:26,329 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:26,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:26,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:26,383 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:26,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:56:26,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:56:26,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:56:26,384 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:26,384 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-09-26 21:56:26,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:26,453 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:56:26,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:56:26,453 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:56:26,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:26,454 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:56:26,454 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:56:26,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:26,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:56:26,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-26 21:56:26,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:56:26,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:56:26,463 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-26 21:56:26,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:26,463 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:56:26,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:56:26,463 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:56:26,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:56:26,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:26,464 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-26 21:56:26,464 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:26,464 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:26,464 INFO L82 PathProgramCache]: Analyzing trace with hash 675782448, now seen corresponding path program 17 times [2018-09-26 21:56:26,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:26,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:26,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:26,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:26,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:26,504 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:26,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:26,514 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:26,522 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-26 21:56:26,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:26,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:26,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:26,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:56:26,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:56:26,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:56:26,576 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:26,576 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-26 21:56:26,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:26,814 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-26 21:56:26,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:56:26,814 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:56:26,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:26,815 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:56:26,815 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:56:26,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:56:26,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2018-09-26 21:56:26,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:56:26,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:56:26,824 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-26 21:56:26,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:26,825 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:56:26,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:56:26,825 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:56:26,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:56:26,825 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:26,825 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-26 21:56:26,825 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:26,825 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:26,825 INFO L82 PathProgramCache]: Analyzing trace with hash 677627568, now seen corresponding path program 18 times [2018-09-26 21:56:26,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:26,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:26,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:26,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:26,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:26,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:26,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:26,882 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:26,894 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-26 21:56:26,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:26,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:26,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:26,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:56:26,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:56:26,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:56:26,989 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:26,989 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-26 21:56:27,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:27,071 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:56:27,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:56:27,071 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:56:27,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:27,072 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:56:27,072 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:56:27,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:27,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:56:27,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-26 21:56:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:56:27,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:56:27,083 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-26 21:56:27,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:27,083 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:56:27,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:56:27,083 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:56:27,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:56:27,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:27,084 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-26 21:56:27,084 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:27,084 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:27,084 INFO L82 PathProgramCache]: Analyzing trace with hash 677629490, now seen corresponding path program 19 times [2018-09-26 21:56:27,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:27,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:27,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:27,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:27,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:27,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:27,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:27,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:27,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:27,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:27,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:56:27,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:56:27,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:56:27,193 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:27,193 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-26 21:56:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:27,285 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-26 21:56:27,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:56:27,286 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:56:27,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:27,286 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:56:27,287 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:56:27,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:27,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:56:27,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2018-09-26 21:56:27,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:56:27,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-26 21:56:27,294 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-26 21:56:27,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:27,294 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-26 21:56:27,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:56:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-26 21:56:27,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:56:27,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:27,295 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-26 21:56:27,295 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:27,295 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:27,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1844179408, now seen corresponding path program 20 times [2018-09-26 21:56:27,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:27,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:27,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:27,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:27,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:27,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:27,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:27,339 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:27,344 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:27,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:27,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:27,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:27,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:56:27,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:56:27,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:56:27,404 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:27,405 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-26 21:56:27,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:27,492 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-26 21:56:27,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:56:27,493 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:56:27,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:27,493 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:56:27,493 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:56:27,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:27,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:56:27,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-09-26 21:56:27,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:56:27,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:56:27,504 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-26 21:56:27,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:27,504 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:56:27,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:56:27,505 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:56:27,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:56:27,505 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:27,505 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-26 21:56:27,506 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:27,506 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:27,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1844177486, now seen corresponding path program 21 times [2018-09-26 21:56:27,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:27,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:27,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:27,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:27,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:27,561 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:27,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:27,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:27,587 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-26 21:56:27,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:27,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:27,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:27,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:56:27,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:56:27,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:56:27,645 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:27,645 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-26 21:56:27,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:27,847 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-26 21:56:27,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:56:27,848 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:56:27,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:27,848 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:56:27,848 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:56:27,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:27,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:56:27,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2018-09-26 21:56:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:56:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:56:27,859 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-26 21:56:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:27,859 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:56:27,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:56:27,859 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:56:27,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:56:27,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:27,860 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-26 21:56:27,860 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:27,861 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:27,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1842332366, now seen corresponding path program 22 times [2018-09-26 21:56:27,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:27,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:27,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:27,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:27,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:27,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:27,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:27,907 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:27,912 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:27,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:27,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:27,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:27,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:56:27,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:56:27,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:56:27,952 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:27,952 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-26 21:56:28,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:28,093 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-26 21:56:28,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:56:28,094 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:56:28,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:28,095 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:56:28,095 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:56:28,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:28,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:56:28,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2018-09-26 21:56:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:56:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:56:28,104 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-26 21:56:28,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:28,104 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:56:28,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:56:28,104 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:56:28,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:56:28,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:28,105 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-09-26 21:56:28,105 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:28,105 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:28,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1842330444, now seen corresponding path program 4 times [2018-09-26 21:56:28,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:28,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:28,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:28,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:28,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:28,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:28,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:28,176 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:28,180 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:28,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:28,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:28,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:28,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:56:28,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:56:28,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:56:28,222 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:28,222 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-26 21:56:28,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:28,370 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2018-09-26 21:56:28,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:56:28,371 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:56:28,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:28,371 INFO L225 Difference]: With dead ends: 24 [2018-09-26 21:56:28,372 INFO L226 Difference]: Without dead ends: 22 [2018-09-26 21:56:28,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:28,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-26 21:56:28,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2018-09-26 21:56:28,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:56:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-26 21:56:28,380 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-26 21:56:28,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:28,380 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-26 21:56:28,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:56:28,380 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-26 21:56:28,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:28,381 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:28,381 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-09-26 21:56:28,381 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:28,381 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:28,381 INFO L82 PathProgramCache]: Analyzing trace with hash 183654063, now seen corresponding path program 5 times [2018-09-26 21:56:28,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:28,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:28,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:28,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:28,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:28,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:28,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:28,436 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:28,508 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:56:28,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:28,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:28,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:28,696 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:28,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:28,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:28,697 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:28,697 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 8 states. [2018-09-26 21:56:28,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:28,796 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:56:28,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:28,796 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:28,797 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:56:28,797 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:56:28,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:28,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:56:28,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-26 21:56:28,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:56:28,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:56:28,811 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:56:28,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:28,811 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:56:28,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:28,811 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:56:28,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:28,811 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:28,812 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:56:28,812 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:28,812 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:28,812 INFO L82 PathProgramCache]: Analyzing trace with hash 183655985, now seen corresponding path program 23 times [2018-09-26 21:56:28,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:28,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:28,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:28,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:28,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:28,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:28,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:28,872 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:28,882 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:56:28,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:28,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:28,944 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:28,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:28,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:28,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:28,944 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:28,944 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:56:29,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:29,053 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:56:29,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:29,054 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:29,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:29,055 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:56:29,055 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:56:29,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:29,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:56:29,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-26 21:56:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:56:29,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:56:29,069 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-26 21:56:29,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:29,070 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:56:29,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:29,070 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:56:29,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:29,070 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:29,070 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:56:29,071 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:29,071 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:29,071 INFO L82 PathProgramCache]: Analyzing trace with hash 185501105, now seen corresponding path program 24 times [2018-09-26 21:56:29,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:29,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:29,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:29,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:29,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:29,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:29,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:29,125 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:29,133 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-26 21:56:29,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:29,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:29,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:29,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:29,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:29,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:29,206 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:29,206 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-26 21:56:29,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:29,347 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:56:29,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:29,348 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:29,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:29,349 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:56:29,349 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:56:29,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:29,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:56:29,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-26 21:56:29,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:56:29,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:56:29,362 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:56:29,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:29,362 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:56:29,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:29,362 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:56:29,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:29,363 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:29,363 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:29,363 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:29,363 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:29,363 INFO L82 PathProgramCache]: Analyzing trace with hash 185503027, now seen corresponding path program 25 times [2018-09-26 21:56:29,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:29,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:29,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:29,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:29,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:29,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:29,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:29,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:29,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:29,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:29,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:29,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:29,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:29,644 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:29,644 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:56:30,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:30,998 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:56:30,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:30,999 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:30,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:30,999 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:56:31,000 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:56:31,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:31,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:56:31,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-09-26 21:56:31,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:56:31,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:56:31,010 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-26 21:56:31,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:31,010 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:56:31,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:31,010 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:56:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:31,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:31,010 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:56:31,010 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:31,011 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:31,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1958661425, now seen corresponding path program 26 times [2018-09-26 21:56:31,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:31,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:31,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:31,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:31,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:31,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:31,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:31,233 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:31,238 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:31,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:31,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:31,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:31,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:31,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:31,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:31,289 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:31,289 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-26 21:56:31,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:31,491 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-26 21:56:31,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:31,492 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:31,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:31,492 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:56:31,493 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:56:31,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:31,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:56:31,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-09-26 21:56:31,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:56:31,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:56:31,506 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:56:31,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:31,506 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:56:31,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:31,506 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:56:31,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:31,506 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:31,507 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:31,507 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:31,507 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:31,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1958663347, now seen corresponding path program 27 times [2018-09-26 21:56:31,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:31,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:31,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:31,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:31,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:31,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:31,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:31,553 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:31,566 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:56:31,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:31,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:31,629 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:31,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:31,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:31,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:31,630 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:31,630 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:56:31,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:31,715 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-26 21:56:31,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:31,715 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:31,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:31,716 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:56:31,716 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:56:31,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:31,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:56:31,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-09-26 21:56:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:56:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:56:31,728 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-26 21:56:31,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:31,729 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:56:31,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:31,729 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:56:31,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:31,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:31,729 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:31,730 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:31,730 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:31,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1960508467, now seen corresponding path program 28 times [2018-09-26 21:56:31,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:31,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:31,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:31,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:31,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:31,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:31,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:31,791 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:31,802 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:31,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:31,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:31,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:31,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:31,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:31,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:31,854 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:31,854 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-26 21:56:31,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:31,963 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-26 21:56:31,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:31,964 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:31,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:31,965 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:56:31,965 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:56:31,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:31,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:56:31,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-09-26 21:56:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:56:31,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:56:31,979 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:56:31,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:31,979 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:56:31,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:31,979 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:56:31,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:31,980 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:31,980 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:31,980 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:31,980 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:31,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1960510389, now seen corresponding path program 29 times [2018-09-26 21:56:31,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:31,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:31,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:31,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:31,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:32,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:32,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:32,046 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:32,053 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:56:32,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:32,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:32,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:32,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:32,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:32,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:32,109 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:32,110 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:56:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:32,189 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-09-26 21:56:32,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:32,190 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:32,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:32,190 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:56:32,190 INFO L226 Difference]: Without dead ends: 24 [2018-09-26 21:56:32,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:32,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-26 21:56:32,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-09-26 21:56:32,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:56:32,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-26 21:56:32,204 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-26 21:56:32,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:32,204 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-26 21:56:32,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:32,205 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-26 21:56:32,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:32,205 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:32,205 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:56:32,205 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:32,205 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:32,206 INFO L82 PathProgramCache]: Analyzing trace with hash 863712433, now seen corresponding path program 30 times [2018-09-26 21:56:32,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:32,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:32,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:32,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:32,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:32,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:32,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:32,274 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:32,284 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-26 21:56:32,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:32,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:32,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:32,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:32,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:32,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:32,333 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:32,333 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-09-26 21:56:32,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:32,427 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:56:32,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:32,427 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:32,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:32,428 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:56:32,428 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:56:32,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:32,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:56:32,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-26 21:56:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:56:32,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:56:32,443 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:56:32,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:32,443 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:56:32,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:56:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:32,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:32,444 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:32,444 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:32,444 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:32,444 INFO L82 PathProgramCache]: Analyzing trace with hash 863714355, now seen corresponding path program 31 times [2018-09-26 21:56:32,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:32,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:32,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:32,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:32,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:32,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:32,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:32,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:32,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:32,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:32,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:32,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:32,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:32,596 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:32,596 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:56:32,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:32,901 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:56:32,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:32,901 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:32,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:32,902 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:56:32,902 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:56:32,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:32,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:56:32,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-26 21:56:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:56:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:56:32,915 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-26 21:56:32,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:32,915 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:56:32,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:32,915 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:56:32,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:32,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:32,916 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:32,916 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:32,916 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:32,916 INFO L82 PathProgramCache]: Analyzing trace with hash 865559475, now seen corresponding path program 32 times [2018-09-26 21:56:32,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:32,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:32,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:32,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:32,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:32,977 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:32,977 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:32,984 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:32,989 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:32,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:32,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:33,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:33,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:33,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:33,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:33,047 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:33,047 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-26 21:56:33,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:33,156 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:56:33,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:33,157 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:33,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:33,157 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:56:33,157 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:56:33,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:56:33,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-26 21:56:33,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:56:33,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:56:33,171 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:56:33,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:33,171 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:56:33,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:33,171 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:56:33,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:33,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:33,172 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:33,172 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:33,172 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:33,172 INFO L82 PathProgramCache]: Analyzing trace with hash 865561397, now seen corresponding path program 33 times [2018-09-26 21:56:33,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:33,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:33,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:33,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:33,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:33,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:33,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:33,270 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:33,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:56:33,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:33,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:33,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:33,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:33,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:33,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:33,322 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:33,322 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:56:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:33,413 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:56:33,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:33,414 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:33,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:33,414 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:56:33,414 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:56:33,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:56:33,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-09-26 21:56:33,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:56:33,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:56:33,427 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-26 21:56:33,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:33,427 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:56:33,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:33,427 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:56:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:33,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:33,428 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:33,428 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:33,428 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:33,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1656247501, now seen corresponding path program 34 times [2018-09-26 21:56:33,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:33,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:33,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:33,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:33,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:33,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:33,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:33,512 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:33,516 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:33,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:33,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:33,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:33,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:33,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:33,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:33,557 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:33,557 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-26 21:56:33,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:33,647 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-26 21:56:33,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:33,648 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:33,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:33,648 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:56:33,649 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:56:33,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:33,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:56:33,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-09-26 21:56:33,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:56:33,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:56:33,665 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:56:33,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:33,665 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:56:33,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:33,665 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:56:33,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:33,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:33,666 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:33,666 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:33,666 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:33,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1656245579, now seen corresponding path program 35 times [2018-09-26 21:56:33,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:33,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:33,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:33,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:33,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:33,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:33,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:33,722 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:33,731 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:56:33,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:33,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:33,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:33,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:33,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:33,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:33,788 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:33,788 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:56:33,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:33,877 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-26 21:56:33,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:33,877 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:33,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:33,878 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:56:33,878 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:56:33,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:33,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:56:33,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-09-26 21:56:33,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:56:33,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:56:33,894 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-26 21:56:33,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:33,894 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:56:33,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:33,894 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:56:33,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:33,895 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:33,895 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:33,895 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:33,895 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:33,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1654400459, now seen corresponding path program 36 times [2018-09-26 21:56:33,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:33,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:33,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:33,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:33,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:33,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:33,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:33,948 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:33,954 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-26 21:56:33,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:33,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:34,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:34,008 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:34,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:34,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:34,009 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:34,009 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-26 21:56:34,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:34,099 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-26 21:56:34,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:34,099 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:34,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:34,100 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:56:34,100 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:56:34,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:56:34,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-09-26 21:56:34,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:56:34,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:56:34,116 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:56:34,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:34,117 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:56:34,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:34,117 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:56:34,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:34,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:34,117 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:56:34,117 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:34,117 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:34,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1654398537, now seen corresponding path program 37 times [2018-09-26 21:56:34,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:34,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:34,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:34,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:34,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:34,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:34,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:34,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:34,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:34,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:34,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:34,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:34,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:34,231 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:34,231 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:56:34,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:34,357 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-09-26 21:56:34,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:34,357 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:34,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:34,358 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:56:34,358 INFO L226 Difference]: Without dead ends: 24 [2018-09-26 21:56:34,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:34,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-26 21:56:34,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-09-26 21:56:34,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:56:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-26 21:56:34,370 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-26 21:56:34,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:34,370 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-26 21:56:34,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:34,370 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-26 21:56:34,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:34,370 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:34,370 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:56:34,371 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:34,371 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:34,371 INFO L82 PathProgramCache]: Analyzing trace with hash 884718641, now seen corresponding path program 38 times [2018-09-26 21:56:34,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:34,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:34,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:34,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:34,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:34,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:34,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:34,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:34,427 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:34,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:34,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:34,484 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:34,484 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:34,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:34,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:34,484 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:34,485 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-09-26 21:56:34,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:34,597 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:56:34,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:34,597 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:34,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:34,598 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:56:34,598 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:56:34,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:34,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:56:34,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-26 21:56:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:56:34,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:56:34,624 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-26 21:56:34,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:34,624 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:56:34,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:34,624 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:56:34,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:34,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:34,625 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:34,625 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:34,625 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:34,625 INFO L82 PathProgramCache]: Analyzing trace with hash 884720563, now seen corresponding path program 39 times [2018-09-26 21:56:34,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:34,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:34,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:34,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:34,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:35,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:35,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:35,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:35,124 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:56:35,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:35,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:35,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:35,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:35,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:35,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:35,185 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:35,185 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-26 21:56:35,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:35,324 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:56:35,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:35,324 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:35,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:35,325 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:56:35,325 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:56:35,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:35,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:56:35,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-26 21:56:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:56:35,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:56:35,348 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:56:35,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:35,348 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:56:35,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:56:35,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:35,348 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:35,348 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:35,349 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:35,349 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:35,349 INFO L82 PathProgramCache]: Analyzing trace with hash 886565683, now seen corresponding path program 40 times [2018-09-26 21:56:35,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:35,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:35,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:35,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:35,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:35,471 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:35,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:35,479 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:35,484 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:35,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:35,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:35,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:35,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:35,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:35,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:35,528 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:35,528 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:56:35,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:35,705 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:56:35,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:35,706 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:35,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:35,706 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:56:35,706 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:56:35,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:35,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:56:35,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-26 21:56:35,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:56:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:56:35,727 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-26 21:56:35,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:35,727 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:56:35,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:56:35,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:35,727 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:35,727 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:35,727 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:35,728 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:35,728 INFO L82 PathProgramCache]: Analyzing trace with hash 886567605, now seen corresponding path program 41 times [2018-09-26 21:56:35,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:35,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:35,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:35,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:35,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:35,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:35,850 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 [2018-09-26 21:56:35,863 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:35,869 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:56:35,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:35,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:35,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:35,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:35,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:35,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:35,911 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:35,912 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-26 21:56:36,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:36,018 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:56:36,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:36,019 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:36,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:36,020 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:56:36,020 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:56:36,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:36,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:56:36,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2018-09-26 21:56:36,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:56:36,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:56:36,037 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-26 21:56:36,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:36,037 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:56:36,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:36,037 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:56:36,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:36,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:36,038 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:36,038 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:36,038 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:36,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1635241293, now seen corresponding path program 42 times [2018-09-26 21:56:36,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:36,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:36,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:36,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:36,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:36,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:36,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:56:36,081 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:36,088 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-26 21:56:36,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:36,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:36,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:36,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:36,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:36,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:36,144 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:36,144 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-26 21:56:36,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:36,251 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:56:36,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:36,251 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:36,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:36,252 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:56:36,252 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:56:36,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:36,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:56:36,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-26 21:56:36,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:56:36,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:56:36,273 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-26 21:56:36,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:36,273 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:56:36,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:36,273 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:56:36,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:36,274 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:36,274 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:36,274 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:36,274 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:36,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1635239371, now seen corresponding path program 43 times [2018-09-26 21:56:36,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:36,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:36,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:36,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:36,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:36,353 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:36,353 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 [2018-09-26 21:56:36,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:36,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:36,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:36,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:36,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:36,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:36,431 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:36,431 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-26 21:56:36,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:36,553 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:56:36,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:36,553 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:36,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:36,554 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:56:36,554 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:56:36,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:36,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:56:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-26 21:56:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:56:36,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:56:36,574 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:56:36,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:36,574 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:56:36,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:36,575 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:56:36,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:36,575 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:36,575 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:36,575 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:36,575 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:36,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1633394251, now seen corresponding path program 44 times [2018-09-26 21:56:36,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:36,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:36,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:36,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:36,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:36,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:36,627 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 [2018-09-26 21:56:36,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:36,646 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:36,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:36,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:36,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:36,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:36,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:36,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:36,695 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:36,695 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:56:36,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:36,855 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:56:36,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:36,855 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:36,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:36,856 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:56:36,856 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:56:36,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:36,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:56:36,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-26 21:56:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:56:36,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:56:36,878 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-26 21:56:36,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:36,878 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:56:36,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:36,878 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:56:36,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:36,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:36,879 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:56:36,879 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:36,879 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:36,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1633392329, now seen corresponding path program 45 times [2018-09-26 21:56:36,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:36,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:36,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:36,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:36,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:36,920 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:36,920 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 [2018-09-26 21:56:36,928 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:36,933 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:56:36,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:36,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:36,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:36,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:36,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:36,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:36,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:36,994 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-26 21:56:37,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:37,111 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:56:37,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:37,112 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:37,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:37,113 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:56:37,113 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:56:37,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:37,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:56:37,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2018-09-26 21:56:37,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:56:37,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:56:37,131 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-26 21:56:37,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:37,131 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:56:37,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:37,132 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:56:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:37,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:37,132 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:37,132 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:37,132 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:37,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1564777011, now seen corresponding path program 46 times [2018-09-26 21:56:37,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:37,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:37,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:37,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:37,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:37,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:37,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:56:37,179 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:37,206 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:37,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:37,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:37,249 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:37,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:37,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:37,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:37,250 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:37,250 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-26 21:56:37,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:37,359 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:56:37,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:37,360 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:37,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:37,360 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:56:37,360 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:56:37,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:56:37,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-26 21:56:37,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:56:37,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:56:37,384 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-26 21:56:37,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:37,384 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:56:37,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:37,385 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:56:37,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:37,385 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:37,385 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:37,385 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:37,385 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:37,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1564778933, now seen corresponding path program 47 times [2018-09-26 21:56:37,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:37,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:37,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:37,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:37,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:37,421 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:37,421 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 [2018-09-26 21:56:37,430 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:37,436 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:56:37,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:37,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:37,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:37,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:37,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:37,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:37,510 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:37,510 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-26 21:56:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:37,622 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:56:37,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:37,623 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:37,623 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:56:37,624 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:56:37,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:37,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:56:37,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-26 21:56:37,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:56:37,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:56:37,646 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:56:37,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:37,647 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:56:37,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:37,647 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:56:37,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:37,647 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:37,647 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:37,647 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:37,647 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:37,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1566624053, now seen corresponding path program 48 times [2018-09-26 21:56:37,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:37,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:37,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:37,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:37,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:37,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:37,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:56:37,713 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:37,723 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-26 21:56:37,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:37,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:37,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:37,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:37,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:37,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:37,765 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:37,765 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:56:37,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:37,958 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:56:37,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:37,959 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:37,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:37,960 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:56:37,960 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:56:37,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:37,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:56:37,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-26 21:56:37,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:56:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:56:37,984 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-26 21:56:37,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:37,984 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:56:37,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:37,984 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:56:37,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:37,985 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:37,985 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:56:37,985 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:37,985 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:37,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1566625975, now seen corresponding path program 49 times [2018-09-26 21:56:37,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:37,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:37,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:37,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:37,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:38,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:38,065 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 [2018-09-26 21:56:38,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:38,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:38,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:38,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:38,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:38,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:38,145 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:38,145 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-26 21:56:38,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:38,377 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:56:38,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:38,378 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:38,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:38,378 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:56:38,379 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:56:38,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:38,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:56:38,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2018-09-26 21:56:38,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:56:38,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:56:38,399 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-26 21:56:38,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:38,399 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:56:38,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:38,399 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:56:38,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:38,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:38,400 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:56:38,400 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:38,400 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:38,400 INFO L82 PathProgramCache]: Analyzing trace with hash -955182923, now seen corresponding path program 50 times [2018-09-26 21:56:38,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:38,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:38,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:38,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:38,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:38,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:38,427 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 [2018-09-26 21:56:38,436 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:38,443 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:38,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:38,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:38,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:38,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:38,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:38,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:38,498 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:38,498 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-26 21:56:38,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:38,608 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:56:38,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:38,608 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:38,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:38,609 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:56:38,609 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:56:38,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:38,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:56:38,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-09-26 21:56:38,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:56:38,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:56:38,634 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-26 21:56:38,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:38,634 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:56:38,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:38,635 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:56:38,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:38,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:38,635 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:56:38,635 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:38,635 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:38,635 INFO L82 PathProgramCache]: Analyzing trace with hash -955181001, now seen corresponding path program 51 times [2018-09-26 21:56:38,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:38,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:38,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:38,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:38,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:38,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:38,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:56:38,685 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:38,692 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:56:38,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:38,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:38,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:38,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:38,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:38,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:38,741 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:38,741 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-26 21:56:38,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:38,857 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:56:38,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:38,858 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:38,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:38,858 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:56:38,858 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:56:38,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:38,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:56:38,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-09-26 21:56:38,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:56:38,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:56:38,882 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:56:38,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:38,882 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:56:38,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:38,883 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:56:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:38,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:38,883 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:56:38,883 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:38,883 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:38,883 INFO L82 PathProgramCache]: Analyzing trace with hash -953335881, now seen corresponding path program 52 times [2018-09-26 21:56:38,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:38,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:38,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:38,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:38,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:38,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:38,923 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 [2018-09-26 21:56:38,932 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:38,937 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:38,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:38,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:38,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:38,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:38,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:38,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:38,992 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:38,992 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:56:39,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:39,094 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-26 21:56:39,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:39,094 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:39,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:39,095 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:56:39,095 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:56:39,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:39,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:56:39,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-09-26 21:56:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:56:39,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:56:39,122 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-26 21:56:39,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:39,122 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:56:39,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:39,122 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:56:39,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:56:39,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:39,123 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-09-26 21:56:39,123 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:39,123 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:39,123 INFO L82 PathProgramCache]: Analyzing trace with hash -953333959, now seen corresponding path program 5 times [2018-09-26 21:56:39,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:39,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:39,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:39,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:39,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:39,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:39,162 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 [2018-09-26 21:56:39,170 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:39,178 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:56:39,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:39,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:39,226 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:39,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:56:39,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:56:39,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:56:39,226 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:39,226 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-26 21:56:39,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:39,328 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2018-09-26 21:56:39,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:56:39,328 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:56:39,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:39,329 INFO L225 Difference]: With dead ends: 28 [2018-09-26 21:56:39,329 INFO L226 Difference]: Without dead ends: 26 [2018-09-26 21:56:39,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:39,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-26 21:56:39,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2018-09-26 21:56:39,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:56:39,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-26 21:56:39,348 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-26 21:56:39,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:39,349 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-26 21:56:39,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:56:39,349 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-26 21:56:39,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:39,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:39,349 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-09-26 21:56:39,349 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:39,349 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:39,350 INFO L82 PathProgramCache]: Analyzing trace with hash 397590258, now seen corresponding path program 6 times [2018-09-26 21:56:39,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:39,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:39,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:39,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:39,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:39,403 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:39,403 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 [2018-09-26 21:56:39,413 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:39,421 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:56:39,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:39,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:39,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:39,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:39,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:39,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:39,490 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:39,490 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 9 states. [2018-09-26 21:56:39,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:39,652 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:56:39,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:39,653 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:39,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:39,653 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:56:39,653 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:56:39,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:39,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:56:39,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-26 21:56:39,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:39,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:39,692 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:39,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:39,692 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:39,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:39,693 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:39,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:39,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:39,693 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:56:39,693 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:39,694 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:39,694 INFO L82 PathProgramCache]: Analyzing trace with hash 397592180, now seen corresponding path program 53 times [2018-09-26 21:56:39,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:39,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:39,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:39,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:39,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:39,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:39,762 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 [2018-09-26 21:56:39,779 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:39,786 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:56:39,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:39,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:39,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:39,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:39,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:39,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:39,839 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:39,839 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:56:39,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:39,991 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:56:39,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:39,991 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:39,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:39,992 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:56:39,992 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:56:39,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:39,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:56:40,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-26 21:56:40,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:56:40,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:56:40,022 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:56:40,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:40,023 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:56:40,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:40,023 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:56:40,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:40,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:40,023 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:56:40,023 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:40,023 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:40,023 INFO L82 PathProgramCache]: Analyzing trace with hash 399437300, now seen corresponding path program 54 times [2018-09-26 21:56:40,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:40,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:40,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:40,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:40,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:40,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:40,090 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 [2018-09-26 21:56:40,100 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:40,107 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:56:40,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:40,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:40,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:40,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:40,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:40,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:40,160 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:40,160 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:56:40,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:40,314 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:56:40,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:40,314 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:40,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:40,315 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:56:40,315 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:56:40,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:40,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:56:40,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-26 21:56:40,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:40,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:40,348 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:40,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:40,348 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:40,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:40,348 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:40,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:40,348 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:40,348 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:40,349 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:40,349 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:40,349 INFO L82 PathProgramCache]: Analyzing trace with hash 399439222, now seen corresponding path program 55 times [2018-09-26 21:56:40,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:40,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:40,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:40,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:40,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:40,392 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:40,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:56:40,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:40,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:40,445 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:40,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:40,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:40,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:40,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:40,465 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:40,465 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:56:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:40,609 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:56:40,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:40,610 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:40,610 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:56:40,610 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:56:40,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:40,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:56:40,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-09-26 21:56:40,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:56:40,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:56:40,641 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-26 21:56:40,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:40,642 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:56:40,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:40,642 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:56:40,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:40,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:40,642 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:56:40,642 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:40,642 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:40,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2122369676, now seen corresponding path program 56 times [2018-09-26 21:56:40,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:40,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:40,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:40,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:40,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:40,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:40,698 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 [2018-09-26 21:56:40,706 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:40,710 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:40,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:40,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:40,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:40,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:40,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:40,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:40,765 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:40,765 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-26 21:56:40,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:40,928 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:56:40,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:40,928 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:40,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:40,929 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:56:40,929 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:56:40,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:40,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:56:40,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-26 21:56:40,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:40,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:40,963 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:40,964 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:40,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:40,964 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:40,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:40,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:40,964 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:40,964 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:40,964 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:40,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2122367754, now seen corresponding path program 57 times [2018-09-26 21:56:40,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:40,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:40,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:40,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:40,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:41,005 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:41,005 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 [2018-09-26 21:56:41,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:41,022 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:56:41,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:41,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:41,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:41,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:41,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:41,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:41,096 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:41,096 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:56:41,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:41,251 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:56:41,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:41,252 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:41,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:41,253 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:56:41,253 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:56:41,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:41,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:56:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-26 21:56:41,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:56:41,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:56:41,286 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:56:41,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:41,286 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:56:41,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:41,286 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:56:41,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:41,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:41,287 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:41,287 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:41,287 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:41,287 INFO L82 PathProgramCache]: Analyzing trace with hash -2120522634, now seen corresponding path program 58 times [2018-09-26 21:56:41,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:41,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:41,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:41,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:41,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:41,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:41,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:56:41,348 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:41,354 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:41,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:41,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:41,411 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:41,411 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:41,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:41,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:41,412 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:41,412 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:56:41,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:41,571 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:56:41,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:41,571 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:41,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:41,571 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:56:41,571 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:56:41,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:41,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:56:41,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-26 21:56:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:41,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:41,603 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:41,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:41,604 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:41,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:41,604 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:41,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:41,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:41,604 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:56:41,604 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:41,604 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:41,604 INFO L82 PathProgramCache]: Analyzing trace with hash -2120520712, now seen corresponding path program 59 times [2018-09-26 21:56:41,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:41,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:41,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:41,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:41,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:42,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:42,065 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 [2018-09-26 21:56:42,079 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:42,090 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:56:42,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:42,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:42,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:42,174 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:42,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:42,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:42,174 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:42,174 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:56:42,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:42,325 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:56:42,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:42,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:42,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:42,326 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:56:42,326 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:56:42,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:42,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:56:42,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-09-26 21:56:42,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:56:42,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:56:42,351 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-26 21:56:42,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:42,351 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:56:42,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:42,351 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:56:42,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:42,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:42,352 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:56:42,352 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:42,352 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:42,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1077648628, now seen corresponding path program 60 times [2018-09-26 21:56:42,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:42,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:42,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:42,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:42,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:42,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:42,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:56:42,447 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:42,454 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:56:42,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:42,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:42,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:42,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:42,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:42,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:42,512 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:42,513 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-26 21:56:42,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:42,655 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:56:42,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:42,655 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:42,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:42,656 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:56:42,656 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:56:42,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:42,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:56:42,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-26 21:56:42,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:42,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:42,690 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:42,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:42,690 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:42,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:42,691 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:42,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:42,691 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:42,691 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:42,691 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:42,691 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:42,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1077650550, now seen corresponding path program 61 times [2018-09-26 21:56:42,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:42,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:42,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:42,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:42,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:42,754 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:42,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:56:42,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:42,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:42,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:42,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:42,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:42,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:42,835 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:42,835 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:56:43,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:43,030 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:56:43,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:43,030 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:43,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:43,030 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:56:43,031 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:56:43,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:43,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:56:43,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-26 21:56:43,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:56:43,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:56:43,065 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:56:43,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:43,065 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:56:43,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:43,065 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:56:43,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:43,066 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:43,066 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:43,066 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:43,066 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:43,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1079495670, now seen corresponding path program 62 times [2018-09-26 21:56:43,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:43,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:43,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:43,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:43,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:43,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:43,131 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 [2018-09-26 21:56:43,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:43,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:43,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:43,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:43,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:43,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:43,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:43,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:43,210 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:43,210 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:56:43,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:43,394 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:56:43,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:43,395 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:43,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:43,396 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:56:43,396 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:56:43,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:43,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:56:43,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-26 21:56:43,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:43,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:43,430 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:43,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:43,431 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:43,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:43,431 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:43,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:43,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:43,431 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:56:43,431 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:43,431 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:43,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1079497592, now seen corresponding path program 63 times [2018-09-26 21:56:43,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:43,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:43,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:43,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:43,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:43,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:43,478 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 [2018-09-26 21:56:43,485 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:43,496 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:56:43,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:43,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:43,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:43,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:43,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:43,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:43,559 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:43,559 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:56:43,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:43,715 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:56:43,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:43,716 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:43,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:43,716 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:56:43,717 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:56:43,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:43,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:56:43,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-09-26 21:56:43,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:56:43,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:56:43,747 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-26 21:56:43,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:43,747 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:56:43,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:43,747 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:56:43,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:43,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:43,748 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:43,748 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:43,748 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:43,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1442311306, now seen corresponding path program 64 times [2018-09-26 21:56:43,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:43,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:43,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:43,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:43,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:43,949 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:43,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:56:43,959 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:43,964 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:43,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:43,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:44,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:44,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:44,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:44,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:44,029 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:44,029 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-26 21:56:44,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:44,161 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:56:44,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:44,161 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:44,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:44,162 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:56:44,162 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:56:44,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:44,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:56:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-09-26 21:56:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:44,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:44,202 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:44,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:44,202 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:44,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:44,202 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:44,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:44,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:44,203 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:56:44,203 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:44,203 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:44,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1442309384, now seen corresponding path program 65 times [2018-09-26 21:56:44,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:44,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:44,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:44,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:44,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:44,265 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:44,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:44,265 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 [2018-09-26 21:56:44,275 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:44,283 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:56:44,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:44,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:44,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:44,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:44,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:44,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:44,375 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:44,375 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:56:44,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:44,529 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:56:44,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:44,530 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:44,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:44,531 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:56:44,531 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:56:44,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:44,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:56:44,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-09-26 21:56:44,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:56:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:56:44,571 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:56:44,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:44,571 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:56:44,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:44,572 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:56:44,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:44,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:44,572 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:56:44,572 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:44,572 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:44,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1440464264, now seen corresponding path program 66 times [2018-09-26 21:56:44,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:44,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:44,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:44,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:44,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:44,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:44,639 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 [2018-09-26 21:56:44,647 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:44,654 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:56:44,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:44,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:44,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:44,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:44,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:44,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:44,706 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:44,706 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:56:44,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:44,886 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:56:44,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:44,887 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:44,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:44,887 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:56:44,887 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:56:44,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:44,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:56:44,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-09-26 21:56:44,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:44,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:44,924 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:44,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:44,924 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:44,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:44,924 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:44,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:44,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:44,924 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:44,925 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:44,925 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:44,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1440462342, now seen corresponding path program 67 times [2018-09-26 21:56:44,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:44,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:44,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:44,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:44,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:44,968 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:44,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:44,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:56:44,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:44,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:45,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:45,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:45,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:45,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:45,043 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:45,043 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:56:45,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:45,164 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-09-26 21:56:45,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:45,164 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:45,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:45,165 INFO L225 Difference]: With dead ends: 30 [2018-09-26 21:56:45,165 INFO L226 Difference]: Without dead ends: 28 [2018-09-26 21:56:45,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:45,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-26 21:56:45,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-09-26 21:56:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:56:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:56:45,191 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-26 21:56:45,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:45,191 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:56:45,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:45,191 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:56:45,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:45,191 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:45,191 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:56:45,192 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:45,192 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:45,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1098654836, now seen corresponding path program 68 times [2018-09-26 21:56:45,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:45,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:45,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:45,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:45,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:45,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:45,267 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 [2018-09-26 21:56:45,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:45,280 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:45,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:45,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:45,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:45,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:45,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:45,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:45,338 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:45,338 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-09-26 21:56:45,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:45,511 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:56:45,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:45,512 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:45,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:45,512 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:56:45,512 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:56:45,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:56:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-26 21:56:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:45,553 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:45,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:45,554 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:45,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:45,554 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:45,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:45,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:45,554 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:45,554 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:45,554 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:45,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1098656758, now seen corresponding path program 69 times [2018-09-26 21:56:45,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:45,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:45,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:45,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:45,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:45,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:45,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:56:45,653 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:45,661 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:56:45,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:45,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:45,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:45,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:45,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:45,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:45,705 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:45,706 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:56:45,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:45,882 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:56:45,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:45,883 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:45,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:45,883 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:56:45,883 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:56:45,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:45,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:56:45,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-26 21:56:45,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:56:45,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:56:45,923 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:56:45,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:45,923 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:56:45,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:45,924 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:56:45,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:45,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:45,924 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:45,924 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:45,924 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:45,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1100501878, now seen corresponding path program 70 times [2018-09-26 21:56:45,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:45,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:45,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:45,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:45,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:46,113 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:46,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:46,113 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 [2018-09-26 21:56:46,121 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:46,126 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:46,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:46,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:46,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:46,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:46,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:46,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:46,180 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:46,180 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:56:46,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:46,355 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:56:46,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:46,355 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:46,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:46,356 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:56:46,356 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:56:46,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:46,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:56:46,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-26 21:56:46,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:46,399 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:46,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:46,399 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:46,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:46,400 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:46,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:46,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:46,400 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:56:46,400 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:46,400 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:46,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1100503800, now seen corresponding path program 71 times [2018-09-26 21:56:46,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:46,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:46,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:46,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:46,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:46,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:46,492 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 [2018-09-26 21:56:46,503 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:46,510 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:56:46,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:46,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:46,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:46,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:46,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:46,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:46,551 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:46,551 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:56:46,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:46,870 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:56:46,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:46,870 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:46,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:46,871 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:56:46,871 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:56:46,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:46,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:56:46,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-09-26 21:56:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:56:46,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:56:46,910 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-26 21:56:46,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:46,910 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:56:46,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:46,911 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:56:46,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:46,911 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:46,911 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:46,911 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:46,911 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:46,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1421305098, now seen corresponding path program 72 times [2018-09-26 21:56:46,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:46,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:46,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:46,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:46,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:46,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:46,990 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 [2018-09-26 21:56:46,998 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:47,006 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:56:47,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:47,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:47,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:47,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:47,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:47,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:47,054 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:47,054 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-26 21:56:47,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:47,237 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:56:47,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:47,237 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:47,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:47,238 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:56:47,238 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:56:47,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:47,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:56:47,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-26 21:56:47,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:47,286 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:47,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:47,286 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:47,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:47,286 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:47,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:47,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:47,287 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:56:47,287 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:47,287 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:47,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1421303176, now seen corresponding path program 73 times [2018-09-26 21:56:47,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:47,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:47,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:47,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:47,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:47,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:47,367 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 [2018-09-26 21:56:47,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:47,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:47,414 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:47,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:47,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:47,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:47,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:47,437 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:47,437 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:56:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:47,628 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:56:47,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:47,628 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:47,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:47,629 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:56:47,629 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:56:47,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:47,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:56:47,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-26 21:56:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:56:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:56:47,668 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:56:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:47,669 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:56:47,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:47,669 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:56:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:47,669 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:47,669 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:56:47,670 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:47,670 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:47,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1419458056, now seen corresponding path program 74 times [2018-09-26 21:56:47,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:47,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:47,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:47,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:47,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:47,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:47,714 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 [2018-09-26 21:56:47,729 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:47,734 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:47,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:47,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:47,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:47,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:47,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:47,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:47,797 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:47,797 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:56:47,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:47,979 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:56:47,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:47,980 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:47,980 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:56:47,981 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:56:47,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:47,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:56:48,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-26 21:56:48,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:48,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:48,029 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:48,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:48,029 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:48,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:48,029 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:48,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:48,030 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:48,030 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:48,030 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:48,030 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:48,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1419456134, now seen corresponding path program 75 times [2018-09-26 21:56:48,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:48,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:48,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:48,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:48,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:48,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:48,083 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 [2018-09-26 21:56:48,089 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:48,099 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:56:48,100 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:48,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:48,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:48,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:48,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:48,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:48,164 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:48,164 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:56:48,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:48,397 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:56:48,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:48,397 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:48,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:48,398 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:56:48,398 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:56:48,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:48,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:56:48,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-09-26 21:56:48,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:56:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:56:48,431 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-26 21:56:48,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:48,432 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:56:48,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:48,432 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:56:48,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:48,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:48,432 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:48,432 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:48,432 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:48,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1778713206, now seen corresponding path program 76 times [2018-09-26 21:56:48,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:48,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:48,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:48,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:48,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:48,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:48,722 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 [2018-09-26 21:56:48,731 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:48,738 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:48,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:48,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:48,761 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:48,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:48,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:48,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:48,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:48,783 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:48,783 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-26 21:56:48,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:48,967 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:56:48,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:48,967 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:48,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:48,968 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:56:48,968 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:56:48,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:48,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:56:49,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-26 21:56:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:49,016 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:49,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:49,016 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:49,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:49,016 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:49,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:49,016 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:49,016 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:56:49,017 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:49,017 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:49,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1778715128, now seen corresponding path program 77 times [2018-09-26 21:56:49,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:49,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:49,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:49,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:49,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:49,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:49,065 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 [2018-09-26 21:56:49,078 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:49,089 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:56:49,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:49,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:49,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:49,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:49,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:49,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:49,161 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:49,162 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:56:49,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:49,356 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:56:49,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:49,356 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:49,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:49,357 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:56:49,357 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:56:49,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:49,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:56:49,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-26 21:56:49,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:56:49,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:56:49,408 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:56:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:49,408 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:56:49,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:49,409 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:56:49,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:49,409 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:49,409 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:56:49,409 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:49,409 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:49,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1780560248, now seen corresponding path program 78 times [2018-09-26 21:56:49,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:49,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:49,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:49,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:49,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:49,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:49,464 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 [2018-09-26 21:56:49,485 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:49,494 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:56:49,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:49,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:49,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:49,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:49,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:49,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:49,543 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:49,543 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:56:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:49,726 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:56:49,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:49,727 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:49,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:49,727 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:56:49,727 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:56:49,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:49,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:56:49,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-26 21:56:49,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:49,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:49,792 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:49,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:49,792 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:49,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:49,792 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:49,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:49,793 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:49,793 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:49,793 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:49,793 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:49,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1780562170, now seen corresponding path program 79 times [2018-09-26 21:56:49,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:49,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:49,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:49,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:49,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:49,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:49,876 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 [2018-09-26 21:56:49,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:49,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:49,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:49,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:49,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:49,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:49,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:49,930 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:49,930 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:56:50,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:50,114 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:56:50,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:50,114 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:50,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:50,115 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:56:50,115 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:56:50,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:50,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:56:50,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-09-26 21:56:50,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:56:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:56:50,154 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-26 21:56:50,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:50,154 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:56:50,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:50,155 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:56:50,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:50,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:50,155 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:56:50,155 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:50,155 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:50,156 INFO L82 PathProgramCache]: Analyzing trace with hash -741246728, now seen corresponding path program 80 times [2018-09-26 21:56:50,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:50,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:50,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:50,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:50,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:50,251 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:50,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:50,252 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 [2018-09-26 21:56:50,260 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:50,264 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:50,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:50,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:50,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:50,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:50,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:50,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:50,310 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:50,310 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-26 21:56:50,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:50,474 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:56:50,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:50,474 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:50,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:50,475 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:56:50,475 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:56:50,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:50,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:56:50,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-09-26 21:56:50,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:50,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:50,520 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:50,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:50,521 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:50,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:50,521 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:50,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:50,521 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:50,521 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:50,521 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:50,521 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:50,521 INFO L82 PathProgramCache]: Analyzing trace with hash -741244806, now seen corresponding path program 81 times [2018-09-26 21:56:50,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:50,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:50,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:50,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:50,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:50,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:50,695 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 [2018-09-26 21:56:50,703 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:50,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:56:50,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:50,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:50,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:50,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:50,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:50,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:50,755 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:50,755 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:56:50,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:50,911 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:56:50,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:50,911 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:50,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:50,912 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:56:50,912 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:56:50,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:50,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:56:50,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-09-26 21:56:50,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:56:50,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:56:50,956 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:56:50,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:50,956 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:56:50,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:50,957 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:56:50,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:50,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:50,957 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:50,957 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:50,957 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:50,957 INFO L82 PathProgramCache]: Analyzing trace with hash -739399686, now seen corresponding path program 82 times [2018-09-26 21:56:50,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:50,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:50,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:50,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:50,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:50,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:50,997 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 [2018-09-26 21:56:51,005 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:51,010 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:51,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:51,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:51,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:51,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:51,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:51,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:51,062 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:51,062 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:56:51,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:51,239 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:56:51,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:51,239 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:51,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:51,240 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:56:51,240 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:56:51,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:51,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:56:51,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-09-26 21:56:51,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:51,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:51,286 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:51,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:51,286 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:51,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:51,286 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:51,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:51,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:51,287 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:56:51,287 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:51,287 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:51,287 INFO L82 PathProgramCache]: Analyzing trace with hash -739397764, now seen corresponding path program 83 times [2018-09-26 21:56:51,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:51,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:51,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:51,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:51,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:51,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:51,449 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 [2018-09-26 21:56:51,458 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:51,463 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:56:51,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:51,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:51,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:51,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:51,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:51,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:51,515 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:51,515 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:56:51,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:51,660 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-09-26 21:56:51,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:51,660 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:51,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:51,661 INFO L225 Difference]: With dead ends: 30 [2018-09-26 21:56:51,661 INFO L226 Difference]: Without dead ends: 28 [2018-09-26 21:56:51,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:51,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-26 21:56:51,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-09-26 21:56:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:56:51,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:56:51,692 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-26 21:56:51,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:51,692 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:56:51,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:51,692 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:56:51,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:51,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:51,692 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:56:51,692 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:51,693 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:51,693 INFO L82 PathProgramCache]: Analyzing trace with hash -189215756, now seen corresponding path program 84 times [2018-09-26 21:56:51,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:51,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:51,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:51,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:51,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:51,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:51,740 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 [2018-09-26 21:56:51,749 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:51,759 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:56:51,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:51,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:51,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:51,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:51,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:51,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:51,808 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:51,808 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-09-26 21:56:52,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:52,036 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:56:52,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:52,037 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:52,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:52,038 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:56:52,038 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:56:52,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:52,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:56:52,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-26 21:56:52,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:56:52,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:56:52,097 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:56:52,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:52,097 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:56:52,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:52,097 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:56:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:52,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:52,098 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:52,098 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:52,098 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:52,098 INFO L82 PathProgramCache]: Analyzing trace with hash -189213834, now seen corresponding path program 85 times [2018-09-26 21:56:52,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:52,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:52,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:52,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:52,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:52,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:52,166 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 [2018-09-26 21:56:52,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:52,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:52,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:52,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:52,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:52,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:52,224 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:52,224 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:56:52,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:52,463 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:56:52,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:52,463 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:52,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:52,464 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:56:52,464 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:56:52,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:52,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:56:52,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-26 21:56:52,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:52,519 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:52,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:52,519 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:52,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:52,519 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:52,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:52,520 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:52,520 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:52,520 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:52,520 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:52,520 INFO L82 PathProgramCache]: Analyzing trace with hash -187368714, now seen corresponding path program 86 times [2018-09-26 21:56:52,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:52,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:52,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:52,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:52,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:52,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:52,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:56:52,594 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:52,599 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:52,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:52,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:52,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:52,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:52,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:52,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:52,649 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:52,649 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:56:52,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:52,902 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:56:52,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:52,902 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:52,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:52,903 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:56:52,903 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:56:52,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:52,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:56:52,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-26 21:56:52,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:56:52,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:56:52,958 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:56:52,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:52,959 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:56:52,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:52,959 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:56:52,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:52,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:52,959 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:56:52,959 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:52,959 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:52,959 INFO L82 PathProgramCache]: Analyzing trace with hash -187366792, now seen corresponding path program 87 times [2018-09-26 21:56:52,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:52,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:52,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:52,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:52,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:53,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:53,018 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 [2018-09-26 21:56:53,027 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:53,034 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:56:53,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:53,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:53,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:53,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:53,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:53,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:53,083 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:53,084 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:56:53,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:53,503 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:56:53,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:53,503 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:53,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:53,504 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:56:53,504 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:56:53,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:53,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:56:53,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-26 21:56:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:56:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:56:53,589 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:56:53,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:53,589 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:56:53,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:53,589 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:56:53,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:53,589 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:53,590 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:53,590 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:53,590 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:53,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1585791606, now seen corresponding path program 88 times [2018-09-26 21:56:53,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:53,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:53,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:53,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:53,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:54,110 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:54,110 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 [2018-09-26 21:56:54,124 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:54,156 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:54,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:54,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:54,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:54,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:54,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:54,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:54,661 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:54,661 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:56:55,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:55,265 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:56:55,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:55,265 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:55,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:55,265 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:56:55,265 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:56:55,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:55,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:56:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-26 21:56:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:56:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:56:55,330 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:56:55,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:55,330 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:56:55,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:55,330 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:56:55,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:55,330 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:55,330 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:56:55,331 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:55,331 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:55,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1585793528, now seen corresponding path program 89 times [2018-09-26 21:56:55,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:55,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:55,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:55,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:55,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:55,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:55,385 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 [2018-09-26 21:56:55,393 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:55,402 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:56:55,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:55,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:55,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:55,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:55,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:55,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:55,455 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:55,456 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:56:55,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:55,704 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:56:55,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:55,704 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:55,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:55,705 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:56:55,705 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:56:55,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:55,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:56:55,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-26 21:56:55,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:55,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:55,761 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:55,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:55,761 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:55,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:55,761 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:55,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:55,761 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:55,761 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:56:55,761 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:55,761 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:55,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1587638648, now seen corresponding path program 90 times [2018-09-26 21:56:55,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:55,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:55,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:55,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:55,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:55,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:55,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:55,847 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:55,854 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:56:55,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:55,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:55,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:55,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:55,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:55,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:55,929 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:55,929 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:56:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:56,145 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:56:56,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:56,146 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:56,147 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:56:56,147 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:56:56,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:56,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:56:56,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-26 21:56:56,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:56:56,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:56:56,206 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:56:56,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:56,206 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:56:56,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:56,206 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:56:56,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:56,206 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:56,206 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:56,207 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:56,207 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:56,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1587640570, now seen corresponding path program 91 times [2018-09-26 21:56:56,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:56,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:56,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:56,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:56,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:56,308 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:56,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:56,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:56,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:56,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:56,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:56,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:56,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:56,373 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:56,373 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:56:56,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:56,577 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:56:56,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:56,578 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:56,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:56,578 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:56:56,578 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:56:56,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:56,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:56:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 22. [2018-09-26 21:56:56,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:56:56,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:56:56,624 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-26 21:56:56,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:56,624 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:56:56,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:56,624 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:56:56,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:56,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:56,625 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:56,625 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:56,625 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:56,625 INFO L82 PathProgramCache]: Analyzing trace with hash 490842614, now seen corresponding path program 92 times [2018-09-26 21:56:56,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:56,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:56,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:56,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:56,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:56,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:56,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:56,676 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:56,684 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:56,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:56,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:56,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:56,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:56,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:56,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:56,746 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:56,746 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-26 21:56:57,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:57,003 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:56:57,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:57,003 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:57,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:57,004 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:56:57,004 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:56:57,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:57,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:56:57,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-26 21:56:57,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:56:57,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:56:57,066 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:56:57,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:57,066 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:56:57,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:57,066 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:56:57,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:57,067 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:57,067 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:56:57,067 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:57,067 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:57,067 INFO L82 PathProgramCache]: Analyzing trace with hash 490844536, now seen corresponding path program 93 times [2018-09-26 21:56:57,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:57,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:57,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:57,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:57,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:57,111 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:57,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:57,119 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:56:57,126 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:56:57,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:57,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:57,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:57,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:57,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:57,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:57,189 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:57,189 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:56:57,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:57,572 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:56:57,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:57,573 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:57,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:57,574 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:56:57,574 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:56:57,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:57,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:56:57,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-26 21:56:57,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:57,671 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:57,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:57,671 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:57,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:57,671 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:57,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:57,671 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:57,672 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:56:57,672 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:57,672 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:57,672 INFO L82 PathProgramCache]: Analyzing trace with hash 492689656, now seen corresponding path program 94 times [2018-09-26 21:56:57,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:57,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:57,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:57,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:57,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:57,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:57,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:57,843 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:56:57,848 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:56:57,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:57,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:57,914 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:57,914 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:57,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:57,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:57,914 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:57,914 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:56:58,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:58,153 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:56:58,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:58,154 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:58,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:58,154 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:56:58,154 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:56:58,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:58,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:56:58,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-26 21:56:58,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:56:58,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:56:58,215 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:56:58,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:58,216 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:56:58,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:58,216 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:56:58,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:58,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:58,216 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:58,216 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:58,216 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:58,216 INFO L82 PathProgramCache]: Analyzing trace with hash 492691578, now seen corresponding path program 95 times [2018-09-26 21:56:58,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:58,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:58,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:58,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:58,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:58,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:58,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:58,349 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:56:58,360 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:56:58,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:58,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:58,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:58,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:58,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:58,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:58,444 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:58,444 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:56:58,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:58,711 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:56:58,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:58,712 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:58,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:58,712 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:56:58,713 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:56:58,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:58,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:56:58,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-26 21:56:58,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:56:58,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:56:58,768 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:56:58,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:58,768 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:56:58,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:58,768 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:56:58,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:58,768 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:58,768 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:56:58,769 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:58,769 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:58,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2029117320, now seen corresponding path program 96 times [2018-09-26 21:56:58,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:58,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:58,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:58,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:58,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:58,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:58,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:58,884 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:56:58,892 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:56:58,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:58,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:58,934 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:58,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:58,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:58,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:58,935 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:58,935 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:56:59,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:59,165 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:56:59,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:59,166 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:59,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:59,166 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:56:59,166 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:56:59,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:59,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:56:59,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-26 21:56:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:56:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:56:59,225 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:56:59,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:59,225 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:56:59,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:59,225 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:56:59,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:59,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:59,226 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:59,226 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:59,226 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:59,226 INFO L82 PathProgramCache]: Analyzing trace with hash -2029115398, now seen corresponding path program 97 times [2018-09-26 21:56:59,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:59,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:59,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:59,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:56:59,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:59,316 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:59,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:59,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:59,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:59,381 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:59,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:59,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:59,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:59,381 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:59,381 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:56:59,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:56:59,614 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:56:59,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:56:59,614 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:56:59,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:56:59,614 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:56:59,614 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:56:59,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:56:59,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:56:59,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-26 21:56:59,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:56:59,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:56:59,672 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:56:59,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:56:59,672 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:56:59,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:56:59,672 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:56:59,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:56:59,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:56:59,673 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:56:59,673 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:56:59,673 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:56:59,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2027270278, now seen corresponding path program 98 times [2018-09-26 21:56:59,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:56:59,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:56:59,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:59,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:56:59,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:56:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:56:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:59,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:56:59,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:56:59,741 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:56:59,746 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:56:59,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:56:59,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:56:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:56:59,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:56:59,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:56:59,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:56:59,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:56:59,796 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:56:59,796 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:57:00,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:00,018 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:57:00,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:57:00,018 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:57:00,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:00,019 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:57:00,019 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:57:00,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:00,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:57:00,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-26 21:57:00,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:00,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:00,078 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:57:00,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:00,078 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:00,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:57:00,078 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:00,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:57:00,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:00,079 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:57:00,079 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:00,079 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:00,080 INFO L82 PathProgramCache]: Analyzing trace with hash -2027268356, now seen corresponding path program 99 times [2018-09-26 21:57:00,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:00,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:00,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:00,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:00,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:00,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:00,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:00,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:57:00,150 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:57:00,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:00,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:00,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:00,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:57:00,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:57:00,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:57:00,210 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:00,210 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:57:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:00,430 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:57:00,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:57:00,430 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:57:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:00,431 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:57:00,431 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:57:00,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:00,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:57:00,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2018-09-26 21:57:00,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:57:00,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:57:00,475 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-26 21:57:00,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:00,476 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:57:00,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:57:00,476 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:57:00,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:57:00,476 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:00,476 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:57:00,476 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:00,476 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:00,476 INFO L82 PathProgramCache]: Analyzing trace with hash 511848822, now seen corresponding path program 100 times [2018-09-26 21:57:00,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:00,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:00,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:00,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:00,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:00,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:00,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:00,534 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:57:00,539 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:57:00,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:00,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:00,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:00,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:57:00,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:57:00,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:57:00,602 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:00,602 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-26 21:57:00,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:00,877 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:57:00,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:57:00,877 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:57:00,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:00,877 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:57:00,878 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:57:00,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:00,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:57:00,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-26 21:57:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:00,947 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:57:00,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:00,947 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:00,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:57:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:00,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:57:00,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:00,948 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:57:00,948 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:00,948 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:00,948 INFO L82 PathProgramCache]: Analyzing trace with hash 511850744, now seen corresponding path program 101 times [2018-09-26 21:57:00,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:00,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:00,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:00,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:00,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:01,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:01,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:01,011 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:57:01,018 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:57:01,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:01,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:01,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:01,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:57:01,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:57:01,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:57:01,066 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:01,066 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:57:01,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:01,306 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:57:01,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:57:01,307 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:57:01,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:01,307 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:57:01,307 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:57:01,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:01,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:57:01,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-26 21:57:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:57:01,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:57:01,372 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:57:01,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:01,373 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:57:01,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:57:01,373 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:57:01,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:57:01,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:01,373 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:57:01,373 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:01,373 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:01,373 INFO L82 PathProgramCache]: Analyzing trace with hash 513695864, now seen corresponding path program 102 times [2018-09-26 21:57:01,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:01,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:01,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:01,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:01,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:01,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:01,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:01,431 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:57:01,438 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:57:01,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:01,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:01,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:01,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:57:01,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:57:01,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:57:01,503 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:01,503 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:57:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:01,733 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:57:01,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:57:01,734 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:57:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:01,734 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:57:01,734 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:57:01,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:57:01,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-26 21:57:01,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:01,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:01,810 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:57:01,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:01,810 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:01,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:57:01,810 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:01,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:57:01,810 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:01,811 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:57:01,811 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:01,811 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:01,811 INFO L82 PathProgramCache]: Analyzing trace with hash 513697786, now seen corresponding path program 103 times [2018-09-26 21:57:01,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:01,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:01,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:01,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:01,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:01,857 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:01,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:01,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:01,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:01,929 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:01,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:57:01,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:57:01,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:57:01,930 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:01,930 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:57:02,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:02,141 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:57:02,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:57:02,142 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:57:02,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:02,142 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:57:02,142 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:57:02,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:02,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:57:02,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-26 21:57:02,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:57:02,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:57:02,205 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:57:02,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:02,205 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:57:02,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:57:02,205 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:57:02,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:57:02,205 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:02,205 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:57:02,205 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:02,206 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:02,206 INFO L82 PathProgramCache]: Analyzing trace with hash -2008111112, now seen corresponding path program 104 times [2018-09-26 21:57:02,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:02,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:02,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:02,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:02,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:02,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:02,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:02,256 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:57:02,260 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:57:02,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:02,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:02,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:02,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:57:02,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:57:02,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:57:02,326 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:02,327 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:57:02,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:02,554 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:57:02,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:57:02,554 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:57:02,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:02,555 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:57:02,555 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:57:02,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:02,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:57:02,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-26 21:57:02,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:02,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:02,628 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:57:02,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:02,628 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:02,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:57:02,628 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:02,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:57:02,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:02,628 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:57:02,629 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:02,629 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:02,629 INFO L82 PathProgramCache]: Analyzing trace with hash -2008109190, now seen corresponding path program 105 times [2018-09-26 21:57:02,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:02,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:02,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:02,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:02,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:02,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:02,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:02,685 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:57:02,698 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:57:02,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:02,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:02,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:02,750 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:57:02,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:57:02,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:57:02,751 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:02,751 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:57:02,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:02,987 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:57:02,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:57:02,987 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:57:02,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:02,988 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:57:02,988 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:57:02,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:02,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:57:03,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-26 21:57:03,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:57:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:57:03,055 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:57:03,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:03,055 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:57:03,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:57:03,056 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:57:03,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:57:03,056 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:03,056 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:57:03,056 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:03,056 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:03,056 INFO L82 PathProgramCache]: Analyzing trace with hash -2006264070, now seen corresponding path program 106 times [2018-09-26 21:57:03,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:03,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:03,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:03,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:03,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:03,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:03,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:03,126 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:57:03,132 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:57:03,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:03,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:03,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:03,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:57:03,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:57:03,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:57:03,185 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:03,185 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:57:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:03,443 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:57:03,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:57:03,443 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:57:03,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:03,444 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:57:03,444 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:57:03,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:03,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:57:03,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-26 21:57:03,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:03,510 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:57:03,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:03,510 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:03,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:57:03,511 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:03,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:57:03,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:03,511 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:57:03,511 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:03,511 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:03,511 INFO L82 PathProgramCache]: Analyzing trace with hash -2006262148, now seen corresponding path program 107 times [2018-09-26 21:57:03,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:03,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:03,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:03,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:03,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:03,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:03,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:03,578 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:57:03,590 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:57:03,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:03,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:03,811 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:03,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:57:03,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:57:03,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:57:03,812 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:03,812 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:57:04,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:04,824 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:57:04,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:57:04,824 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:57:04,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:04,825 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:57:04,825 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:57:04,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:04,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:57:04,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-26 21:57:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:57:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:57:04,875 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-26 21:57:04,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:04,875 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:57:04,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:57:04,876 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:57:04,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:57:04,876 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:04,876 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:57:04,876 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:04,876 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:04,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1191907192, now seen corresponding path program 108 times [2018-09-26 21:57:04,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:04,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:04,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:04,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:04,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:04,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:04,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:04,922 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:57:04,931 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:57:04,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:04,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:04,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:04,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:57:04,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:57:04,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:57:04,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:04,994 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-26 21:57:05,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:05,211 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:57:05,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:57:05,211 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:57:05,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:05,212 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:57:05,212 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:57:05,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:05,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:57:05,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-26 21:57:05,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:05,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:05,323 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:57:05,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:05,323 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:05,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:57:05,324 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:05,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:57:05,324 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:05,324 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:57:05,324 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:05,324 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:05,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1191909114, now seen corresponding path program 109 times [2018-09-26 21:57:05,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:05,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:05,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:05,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:05,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:05,731 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:05,731 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:05,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:05,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:05,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:05,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:57:05,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:57:05,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:57:05,790 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:05,790 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:57:05,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:05,991 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:57:05,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:57:05,991 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:57:05,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:05,992 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:57:05,992 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:57:05,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:05,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:57:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-26 21:57:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:57:06,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:57:06,090 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:57:06,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:06,091 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:57:06,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:57:06,091 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:57:06,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:57:06,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:06,091 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:57:06,091 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:06,091 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:06,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1193754234, now seen corresponding path program 110 times [2018-09-26 21:57:06,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:06,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:06,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:06,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:06,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:06,149 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:06,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:06,158 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:57:06,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:57:06,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:06,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:06,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:06,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:57:06,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:57:06,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:57:06,240 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:06,240 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:57:06,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:06,498 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:57:06,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:57:06,498 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:57:06,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:06,499 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:57:06,499 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:57:06,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:06,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:57:06,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-26 21:57:06,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:06,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:06,573 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:57:06,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:06,573 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:06,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:57:06,573 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:06,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:57:06,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:06,573 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:57:06,573 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:06,573 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:06,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1193756156, now seen corresponding path program 111 times [2018-09-26 21:57:06,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:06,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:06,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:06,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:06,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:06,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:06,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:06,646 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:57:06,653 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:57:06,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:06,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:06,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:06,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:57:06,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:57:06,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:57:06,695 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:06,695 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:57:06,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:06,910 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:57:06,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:57:06,911 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:57:06,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:06,911 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:57:06,912 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:57:06,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:06,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:57:06,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-26 21:57:06,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:57:06,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:57:06,976 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:57:06,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:06,976 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:57:06,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:57:06,976 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:57:06,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:57:06,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:06,977 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:57:06,977 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:06,977 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:06,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1328052742, now seen corresponding path program 112 times [2018-09-26 21:57:06,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:06,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:06,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:06,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:06,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:07,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:07,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:07,029 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:57:07,034 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:57:07,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:07,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:07,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:07,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:57:07,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:57:07,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:57:07,110 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:07,110 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:57:07,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:07,303 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:57:07,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:57:07,303 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:57:07,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:07,304 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:57:07,304 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:57:07,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:07,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:57:07,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2018-09-26 21:57:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:07,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:07,373 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:57:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:07,373 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:07,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:57:07,373 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:07,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:57:07,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:07,374 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:57:07,374 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:07,374 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:07,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1328050820, now seen corresponding path program 113 times [2018-09-26 21:57:07,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:07,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:07,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:07,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:07,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:07,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:07,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:07,458 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:57:07,465 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:57:07,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:07,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:07,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:07,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:57:07,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:57:07,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:57:07,511 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:07,511 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:57:07,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:07,715 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:57:07,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:57:07,716 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:57:07,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:07,716 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:57:07,716 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:57:07,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:07,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:57:07,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2018-09-26 21:57:07,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:57:07,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:57:07,787 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:57:07,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:07,787 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:57:07,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:57:07,787 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:57:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:57:07,788 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:07,788 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:57:07,788 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:07,788 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:07,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1326205700, now seen corresponding path program 114 times [2018-09-26 21:57:07,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:07,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:07,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:07,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:07,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:07,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:07,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:07,860 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:57:07,867 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:57:07,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:07,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:07,914 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:07,914 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:57:07,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:57:07,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:57:07,915 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:07,915 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:57:08,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:08,104 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:57:08,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:57:08,104 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:57:08,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:08,104 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:57:08,105 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:57:08,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:08,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:57:08,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-09-26 21:57:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:08,179 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:57:08,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:08,180 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:08,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:57:08,180 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:08,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:57:08,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:08,180 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-09-26 21:57:08,180 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:08,181 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:08,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1326203778, now seen corresponding path program 6 times [2018-09-26 21:57:08,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:08,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:08,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:08,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:08,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:08,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:08,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:08,238 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:57:08,245 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:57:08,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:08,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:08,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:08,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:57:08,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:57:08,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:57:08,306 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:08,306 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:57:08,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:08,494 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2018-09-26 21:57:08,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:57:08,494 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:57:08,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:08,495 INFO L225 Difference]: With dead ends: 32 [2018-09-26 21:57:08,495 INFO L226 Difference]: Without dead ends: 30 [2018-09-26 21:57:08,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:08,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-26 21:57:08,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2018-09-26 21:57:08,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:57:08,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:57:08,544 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-26 21:57:08,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:08,544 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:57:08,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:57:08,544 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:57:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:08,545 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:08,545 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-09-26 21:57:08,545 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:08,545 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:08,545 INFO L82 PathProgramCache]: Analyzing trace with hash -168156555, now seen corresponding path program 7 times [2018-09-26 21:57:08,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:08,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:08,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:08,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:08,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:08,621 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:08,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:08,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:08,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:08,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:08,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:08,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:08,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:08,706 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:08,706 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 10 states. [2018-09-26 21:57:09,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:09,165 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:57:09,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:09,165 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:09,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:09,166 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:57:09,166 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:57:09,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:57:09,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:57:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:09,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:09,253 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:09,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:09,254 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:09,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:09,254 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:09,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:09,254 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:09,254 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:57:09,254 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:09,255 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:09,255 INFO L82 PathProgramCache]: Analyzing trace with hash -168154633, now seen corresponding path program 115 times [2018-09-26 21:57:09,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:09,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:09,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:09,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:09,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:09,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:09,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:09,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:09,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:09,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:09,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:09,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:09,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:09,405 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:09,405 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:09,717 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:57:09,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:09,718 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:09,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:09,718 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:57:09,718 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:57:09,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:09,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:57:09,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-26 21:57:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:09,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:09,837 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:57:09,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:09,838 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:09,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:09,838 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:09,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:09,838 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:09,838 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:57:09,838 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:09,839 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:09,839 INFO L82 PathProgramCache]: Analyzing trace with hash -166309513, now seen corresponding path program 116 times [2018-09-26 21:57:09,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:09,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:09,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:09,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:09,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:09,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:09,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:09,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:57:09,910 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:57:09,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:09,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:09,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:09,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:09,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:09,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:09,970 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:09,970 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:57:10,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:10,313 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:57:10,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:10,314 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:10,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:10,314 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:57:10,314 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:57:10,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:10,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:57:10,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:57:10,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:10,402 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:10,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:10,402 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:10,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:10,402 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:10,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:10,403 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:10,403 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:10,403 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:10,403 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:10,403 INFO L82 PathProgramCache]: Analyzing trace with hash -166307591, now seen corresponding path program 117 times [2018-09-26 21:57:10,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:10,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:10,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:10,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:10,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:10,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:10,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:10,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:57:10,476 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:57:10,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:10,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:10,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:10,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:10,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:10,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:10,530 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:10,530 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:10,834 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:57:10,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:10,834 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:10,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:10,835 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:57:10,835 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:57:10,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:10,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:57:10,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-26 21:57:10,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:57:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:57:10,916 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:57:10,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:10,916 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:57:10,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:10,917 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:57:10,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:10,917 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:10,917 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:57:10,917 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:10,917 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:10,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1606850807, now seen corresponding path program 118 times [2018-09-26 21:57:10,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:10,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:10,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:10,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:10,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:10,968 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:10,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:10,978 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:57:10,983 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:57:10,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:10,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:11,017 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:11,038 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:11,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:11,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:11,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:11,039 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:11,039 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:57:11,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:11,338 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:57:11,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:11,338 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:11,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:11,338 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:57:11,338 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:57:11,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:11,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:57:11,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-26 21:57:11,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:11,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:11,430 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:11,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:11,430 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:11,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:11,430 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:11,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:11,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:11,431 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:11,431 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:11,431 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:11,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1606852729, now seen corresponding path program 119 times [2018-09-26 21:57:11,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:11,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:11,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:11,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:11,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:11,519 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:11,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:11,527 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:57:11,537 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:57:11,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:11,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:11,600 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:11,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:11,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:11,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:11,601 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:11,601 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:11,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:11,911 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:57:11,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:11,911 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:11,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:11,912 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:57:11,912 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:57:11,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:11,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:57:11,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-26 21:57:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:11,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:11,997 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:57:11,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:11,998 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:11,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:11,998 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:11,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:11,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:11,998 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:11,998 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:11,998 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:11,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1608697849, now seen corresponding path program 120 times [2018-09-26 21:57:11,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:11,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:11,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:11,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:11,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:12,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:12,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:12,163 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:57:12,171 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:57:12,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:12,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:12,217 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:12,217 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:12,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:12,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:12,217 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:12,217 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:57:12,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:12,508 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:57:12,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:12,511 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:12,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:12,511 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:57:12,511 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:57:12,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:12,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:57:12,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-26 21:57:12,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:12,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:12,602 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:12,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:12,602 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:12,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:12,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:12,603 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:12,603 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:12,603 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:12,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1608699771, now seen corresponding path program 121 times [2018-09-26 21:57:12,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:12,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:12,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:12,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:12,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:12,656 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:12,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:12,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:12,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:12,732 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:12,732 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:12,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:12,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:12,732 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:12,733 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:13,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:13,003 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:57:13,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:13,004 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:13,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:13,004 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:57:13,004 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:57:13,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:13,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:57:13,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-09-26 21:57:13,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:57:13,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:57:13,080 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-26 21:57:13,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:13,080 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:57:13,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:13,081 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:57:13,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:13,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:13,081 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:57:13,081 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:13,081 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:13,081 INFO L82 PathProgramCache]: Analyzing trace with hash 511901815, now seen corresponding path program 122 times [2018-09-26 21:57:13,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:13,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:13,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:13,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:13,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:13,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:13,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:13,153 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:57:13,159 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:57:13,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:13,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:13,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:13,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:13,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:13,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:13,220 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:13,221 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-26 21:57:13,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:13,543 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:57:13,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:13,543 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:13,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:13,544 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:57:13,544 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:57:13,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:13,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:57:13,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:57:13,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:13,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:13,644 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:13,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:13,644 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:13,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:13,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:13,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:13,644 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:13,645 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:13,645 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:13,645 INFO L82 PathProgramCache]: Analyzing trace with hash 511903737, now seen corresponding path program 123 times [2018-09-26 21:57:13,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:13,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:13,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:13,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:13,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:13,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:13,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:13,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:57:13,723 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:57:13,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:13,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:13,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:13,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:13,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:13,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:13,794 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:13,794 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:14,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:14,216 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:57:14,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:14,216 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:14,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:14,216 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:57:14,216 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:57:14,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:14,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:57:14,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-26 21:57:14,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:14,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:14,309 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:57:14,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:14,309 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:14,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:14,309 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:14,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:14,309 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:14,309 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:14,309 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:14,309 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:14,309 INFO L82 PathProgramCache]: Analyzing trace with hash 513748857, now seen corresponding path program 124 times [2018-09-26 21:57:14,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:14,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:14,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:14,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:14,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:14,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:14,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:14,367 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:57:14,372 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:57:14,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:14,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:14,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:14,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:14,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:14,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:14,429 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:14,429 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:57:14,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:14,765 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:57:14,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:14,765 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:14,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:14,765 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:57:14,765 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:57:14,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:14,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:57:14,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:57:14,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:14,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:14,858 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:14,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:14,858 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:14,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:14,858 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:14,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:14,858 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:14,858 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:14,858 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:14,859 INFO L82 PathProgramCache]: Analyzing trace with hash 513750779, now seen corresponding path program 125 times [2018-09-26 21:57:14,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:14,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:14,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:14,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:14,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:14,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:14,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:14,975 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:57:14,983 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:57:14,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:14,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:15,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:15,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:15,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:15,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:15,045 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:15,045 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:15,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:15,362 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:57:15,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:15,363 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:15,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:15,363 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:57:15,364 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:57:15,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:57:15,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-26 21:57:15,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:57:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:57:15,449 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:57:15,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:15,449 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:57:15,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:15,450 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:57:15,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:15,450 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:15,450 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:15,450 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:15,450 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:15,450 INFO L82 PathProgramCache]: Analyzing trace with hash -2008058119, now seen corresponding path program 126 times [2018-09-26 21:57:15,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:15,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:15,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:15,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:15,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:15,504 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:15,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:15,512 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:57:15,522 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:57:15,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:15,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:15,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:15,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:15,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:15,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:15,587 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:15,588 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:57:15,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:15,896 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:57:15,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:15,897 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:15,897 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:57:15,897 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:57:15,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:15,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:57:15,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-26 21:57:15,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:15,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:15,994 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:15,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:15,995 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:15,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:15,995 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:15,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:15,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:15,995 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:15,995 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:15,995 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:15,995 INFO L82 PathProgramCache]: Analyzing trace with hash -2008056197, now seen corresponding path program 127 times [2018-09-26 21:57:15,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:15,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:15,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:15,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:15,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:16,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:16,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:16,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:16,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:16,963 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:16,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:16,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:16,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:16,964 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:16,964 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:17,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:17,276 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:57:17,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:17,276 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:17,277 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:57:17,277 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:57:17,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:17,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:57:17,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-26 21:57:17,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:17,374 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:57:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:17,374 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:17,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:17,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:17,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:17,374 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:17,374 INFO L423 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:17,375 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:17,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2006211077, now seen corresponding path program 128 times [2018-09-26 21:57:17,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:17,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:17,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:17,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:17,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:17,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:17,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:17,612 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:57:17,617 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:57:17,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:17,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:17,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:17,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:17,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:17,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:17,662 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:17,662 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:57:17,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:17,974 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:57:17,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:17,975 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:17,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:17,975 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:57:17,975 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:57:17,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:17,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:57:18,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-26 21:57:18,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:18,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:18,079 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:18,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:18,079 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:18,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:18,079 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:18,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:18,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:18,079 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:18,079 INFO L423 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:18,080 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:18,080 INFO L82 PathProgramCache]: Analyzing trace with hash -2006209155, now seen corresponding path program 129 times [2018-09-26 21:57:18,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:18,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:18,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:18,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:18,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:18,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:18,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:18,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:57:18,149 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:57:18,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:18,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:18,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:18,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:18,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:18,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:18,213 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:18,213 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:18,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:18,495 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:57:18,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:18,495 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:18,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:18,496 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:57:18,496 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:57:18,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:18,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:57:18,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-09-26 21:57:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:57:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:57:18,574 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-26 21:57:18,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:18,574 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:57:18,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:18,574 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:57:18,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:18,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:18,574 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:57:18,575 INFO L423 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:18,575 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:18,575 INFO L82 PathProgramCache]: Analyzing trace with hash 532908023, now seen corresponding path program 130 times [2018-09-26 21:57:18,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:18,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:18,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:18,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:18,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:18,626 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:18,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:18,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:18,635 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:57:18,641 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:57:18,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:18,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:18,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:18,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:18,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:18,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:18,693 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:18,693 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-26 21:57:19,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:19,028 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:57:19,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:19,028 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:19,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:19,029 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:57:19,029 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:57:19,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:19,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:57:19,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-26 21:57:19,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:19,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:19,136 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:19,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:19,136 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:19,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:19,136 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:19,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:19,136 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:19,136 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:19,136 INFO L423 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:19,136 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:19,137 INFO L82 PathProgramCache]: Analyzing trace with hash 532909945, now seen corresponding path program 131 times [2018-09-26 21:57:19,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:19,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:19,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:19,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:19,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:19,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:19,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:19,207 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:57:19,214 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:57:19,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:19,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:19,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:19,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:19,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:19,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:19,311 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:19,311 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:19,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:19,636 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:57:19,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:19,636 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:19,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:19,637 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:57:19,637 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:57:19,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:19,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:57:19,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-26 21:57:19,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:19,732 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:57:19,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:19,732 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:19,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:19,732 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:19,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:19,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:19,732 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:19,732 INFO L423 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:19,732 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:19,732 INFO L82 PathProgramCache]: Analyzing trace with hash 534755065, now seen corresponding path program 132 times [2018-09-26 21:57:19,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:19,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:19,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:19,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:19,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:19,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:19,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:19,821 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:57:19,829 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:57:19,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:19,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:19,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:19,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:19,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:19,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:19,877 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:19,877 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:57:20,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:20,175 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:57:20,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:20,176 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:20,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:20,176 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:57:20,176 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:57:20,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:20,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:57:20,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-26 21:57:20,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:20,284 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:20,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:20,284 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:20,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:20,284 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:20,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:20,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:20,284 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:20,284 INFO L423 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:20,284 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:20,285 INFO L82 PathProgramCache]: Analyzing trace with hash 534756987, now seen corresponding path program 133 times [2018-09-26 21:57:20,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:20,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:20,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:20,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:20,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:20,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:20,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:20,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:20,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:20,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:20,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:20,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:20,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:20,711 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:20,711 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:20,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:20,999 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:57:20,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:20,999 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:21,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:21,000 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:57:21,000 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:57:21,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:21,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:57:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-26 21:57:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:57:21,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:57:21,091 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:57:21,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:21,092 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:57:21,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:21,092 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:57:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:21,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:21,092 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:21,092 INFO L423 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:21,092 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:21,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1987051911, now seen corresponding path program 134 times [2018-09-26 21:57:21,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:21,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:21,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:21,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:21,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:21,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:21,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:21,260 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:57:21,268 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:57:21,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:21,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:21,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:21,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:21,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:21,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:21,312 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:21,312 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:57:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:21,622 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:57:21,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:21,622 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:21,622 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:57:21,623 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:57:21,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:21,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:57:21,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-26 21:57:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:21,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:21,732 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:21,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:21,732 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:21,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:21,733 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:21,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:21,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:21,733 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:21,733 INFO L423 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:21,733 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:21,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1987049989, now seen corresponding path program 135 times [2018-09-26 21:57:21,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:21,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:21,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:21,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:21,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:21,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:21,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:21,792 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:57:21,801 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:57:21,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:21,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:21,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:21,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:21,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:21,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:21,869 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:21,869 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:22,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:22,180 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:57:22,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:22,181 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:22,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:22,181 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:57:22,181 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:57:22,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:22,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:57:22,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-26 21:57:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:22,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:22,284 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:57:22,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:22,285 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:22,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:22,285 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:22,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:22,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:22,285 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:22,285 INFO L423 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:22,285 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:22,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1985204869, now seen corresponding path program 136 times [2018-09-26 21:57:22,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:22,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:22,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:22,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:22,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:22,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:22,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:22,341 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:57:22,350 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:57:22,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:22,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:22,414 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:22,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:22,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:22,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:22,414 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:22,414 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:57:22,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:22,721 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:57:22,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:22,721 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:22,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:22,722 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:57:22,722 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:57:22,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:22,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:57:22,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-26 21:57:22,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:22,841 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:22,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:22,842 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:22,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:22,842 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:22,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:22,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:22,842 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:22,842 INFO L423 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:22,842 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:22,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1985202947, now seen corresponding path program 137 times [2018-09-26 21:57:22,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:22,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:22,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:22,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:22,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:22,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:22,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:22,899 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:57:22,908 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:57:22,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:22,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:22,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:22,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:22,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:22,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:22,963 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:22,963 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:23,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:23,277 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:57:23,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:23,277 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:23,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:23,278 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:57:23,278 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:57:23,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:23,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:57:23,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-26 21:57:23,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:57:23,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:57:23,365 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-26 21:57:23,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:23,365 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:57:23,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:23,365 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:57:23,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:23,365 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:23,365 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:23,366 INFO L423 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:23,366 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:23,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1212966393, now seen corresponding path program 138 times [2018-09-26 21:57:23,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:23,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:23,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:23,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:23,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:23,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:23,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:23,450 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:57:23,463 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:57:23,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:23,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:23,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:23,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:23,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:23,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:23,511 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:23,511 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-26 21:57:23,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:23,810 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:57:23,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:23,810 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:23,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:23,811 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:57:23,811 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:57:23,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:23,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:57:23,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-26 21:57:23,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:23,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:23,944 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:23,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:23,944 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:23,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:23,944 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:23,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:23,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:23,944 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:23,944 INFO L423 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:23,944 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:23,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1212968315, now seen corresponding path program 139 times [2018-09-26 21:57:23,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:23,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:23,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:23,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:23,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:24,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:24,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:24,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:24,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:24,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:24,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:24,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:24,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:24,103 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:24,103 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:24,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:24,417 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:57:24,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:24,417 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:24,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:24,418 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:57:24,418 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:57:24,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:24,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:57:24,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-26 21:57:24,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:24,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:24,526 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:57:24,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:24,526 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:24,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:24,526 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:24,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:24,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:24,527 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:24,527 INFO L423 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:24,527 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:24,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1214813435, now seen corresponding path program 140 times [2018-09-26 21:57:24,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:24,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:24,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:24,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:24,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:24,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:24,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:24,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:57:24,621 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:57:24,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:24,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:24,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:24,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:24,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:24,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:24,686 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:24,686 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:57:24,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:24,986 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:57:24,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:24,986 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:24,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:24,986 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:57:24,987 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:57:24,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:24,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:57:25,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-26 21:57:25,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:25,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:25,100 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:25,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:25,100 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:25,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:25,100 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:25,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:25,100 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:25,100 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:25,101 INFO L423 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:25,101 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:25,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1214815357, now seen corresponding path program 141 times [2018-09-26 21:57:25,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:25,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:25,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:25,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:25,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:25,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:25,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:25,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:57:25,168 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:57:25,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:25,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:25,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:25,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:25,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:25,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:25,236 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:25,236 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:25,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:25,540 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:57:25,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:25,540 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:25,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:25,540 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:57:25,540 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:57:25,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:25,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:57:25,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-26 21:57:25,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:57:25,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:57:25,644 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:57:25,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:25,645 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:57:25,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:25,645 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:57:25,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:25,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:25,645 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:25,645 INFO L423 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:25,645 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:25,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1306993541, now seen corresponding path program 142 times [2018-09-26 21:57:25,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:25,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:25,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:25,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:25,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:25,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:25,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:25,702 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:57:25,710 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:57:25,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:25,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:25,767 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:25,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:25,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:25,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:25,767 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:25,767 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:57:26,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:26,063 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:57:26,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:26,063 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:26,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:26,064 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:57:26,064 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:57:26,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:26,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:57:26,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-09-26 21:57:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:26,175 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:26,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:26,175 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:26,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:26,175 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:26,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:26,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:26,175 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:26,175 INFO L423 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:26,175 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:26,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1306991619, now seen corresponding path program 143 times [2018-09-26 21:57:26,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:26,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:26,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:26,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:26,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:26,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:26,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:26,256 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:57:26,264 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:57:26,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:26,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:26,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:26,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:26,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:26,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:26,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:26,319 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:26,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:26,587 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:57:26,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:26,588 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:26,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:26,588 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:57:26,588 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:57:26,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:26,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:57:26,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-09-26 21:57:26,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:26,696 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:57:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:26,697 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:26,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:26,697 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:26,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:26,697 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:26,697 INFO L423 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:26,697 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:26,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1305146499, now seen corresponding path program 144 times [2018-09-26 21:57:26,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:26,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:26,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:26,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:26,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:26,747 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:26,747 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:26,755 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:57:26,764 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:57:26,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:26,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:26,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:26,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:26,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:26,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:26,822 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:26,822 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:57:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:27,093 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:57:27,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:27,093 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:27,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:27,094 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:57:27,094 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:57:27,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:27,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:57:27,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-09-26 21:57:27,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:27,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:27,200 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:27,200 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:27,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:27,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:27,201 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:27,201 INFO L423 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:27,201 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:27,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1305144577, now seen corresponding path program 145 times [2018-09-26 21:57:27,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:27,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:27,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:27,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:27,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:27,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:27,250 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:27,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:27,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:27,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:27,325 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:27,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:27,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:27,325 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:27,325 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:27,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:27,567 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-09-26 21:57:27,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:27,567 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:27,568 INFO L225 Difference]: With dead ends: 34 [2018-09-26 21:57:27,568 INFO L226 Difference]: Without dead ends: 32 [2018-09-26 21:57:27,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:27,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-26 21:57:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-09-26 21:57:27,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:57:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:57:27,638 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-26 21:57:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:27,638 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:57:27,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:57:27,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:27,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:27,639 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:57:27,639 INFO L423 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:27,639 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:27,639 INFO L82 PathProgramCache]: Analyzing trace with hash -754962569, now seen corresponding path program 146 times [2018-09-26 21:57:27,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:27,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:27,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:27,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:27,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:27,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:27,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:27,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:57:27,718 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:57:27,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:27,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:27,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:27,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:27,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:27,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:27,785 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:27,785 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-09-26 21:57:28,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:28,162 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:57:28,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:28,162 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:28,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:28,163 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:57:28,163 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:57:28,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:57:28,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:57:28,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:28,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:28,295 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:28,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:28,295 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:28,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:28,295 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:28,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:28,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:28,305 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:28,305 INFO L423 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:28,305 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:28,305 INFO L82 PathProgramCache]: Analyzing trace with hash -754960647, now seen corresponding path program 147 times [2018-09-26 21:57:28,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:28,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:28,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:28,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:28,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:28,355 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:28,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:28,362 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:57:28,370 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:57:28,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:28,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:28,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:28,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:28,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:28,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:28,442 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:28,442 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:28,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:28,832 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:57:28,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:28,832 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:28,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:28,833 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:57:28,833 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:57:28,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:28,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:57:29,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-26 21:57:29,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:29,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:29,001 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:57:29,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:29,001 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:29,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:29,001 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:29,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:29,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:29,001 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:29,002 INFO L423 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:29,002 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:29,002 INFO L82 PathProgramCache]: Analyzing trace with hash -753115527, now seen corresponding path program 148 times [2018-09-26 21:57:29,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:29,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:29,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:29,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:29,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:29,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:29,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:29,064 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:57:29,070 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:57:29,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:29,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:29,189 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:29,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:29,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:29,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:29,189 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:29,189 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:57:29,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:29,613 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:57:29,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:29,613 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:29,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:29,614 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:57:29,614 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:57:29,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:29,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:57:29,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:57:29,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:29,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:29,729 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:29,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:29,729 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:29,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:29,729 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:29,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:29,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:29,729 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:29,730 INFO L423 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:29,730 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:29,730 INFO L82 PathProgramCache]: Analyzing trace with hash -753113605, now seen corresponding path program 149 times [2018-09-26 21:57:29,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:29,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:29,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:29,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:29,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:29,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:29,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:29,882 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:57:29,893 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:57:29,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:29,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:29,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:29,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:29,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:29,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:29,939 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:29,939 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:30,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:30,314 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:57:30,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:30,314 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:30,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:30,315 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:57:30,315 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:57:30,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:30,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:57:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-26 21:57:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:57:30,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:57:30,423 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:57:30,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:30,423 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:57:30,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:30,423 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:57:30,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:30,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:30,423 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:30,423 INFO L423 AbstractCegarLoop]: === Iteration 164 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:30,423 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:30,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1020044793, now seen corresponding path program 150 times [2018-09-26 21:57:30,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:30,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:30,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:30,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:30,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:30,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:30,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:30,541 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:57:30,549 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:57:30,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:30,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:30,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:30,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:30,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:30,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:30,608 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:30,608 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:57:30,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:30,966 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:57:30,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:30,967 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:30,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:30,967 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:57:30,967 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:57:30,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:30,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:57:31,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-26 21:57:31,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:31,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:31,091 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:31,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:31,091 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:31,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:31,092 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:31,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:31,092 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:31,092 INFO L423 AbstractCegarLoop]: === Iteration 165 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:31,092 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:31,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1020046715, now seen corresponding path program 151 times [2018-09-26 21:57:31,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:31,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:31,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:31,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:31,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:31,147 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:31,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:31,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:31,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:31,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:31,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:31,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:31,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:31,214 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:31,214 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:31,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:31,574 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:57:31,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:31,574 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:31,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:31,575 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:57:31,575 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:57:31,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:31,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:57:31,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-26 21:57:31,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:31,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:31,700 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:57:31,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:31,700 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:31,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:31,700 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:31,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:31,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:31,700 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:31,700 INFO L423 AbstractCegarLoop]: === Iteration 166 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:31,701 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:31,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1021891835, now seen corresponding path program 152 times [2018-09-26 21:57:31,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:31,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:31,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:31,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:31,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:31,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:31,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:31,758 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:57:31,764 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:57:31,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:31,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:31,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:31,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:31,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:31,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:31,822 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:31,822 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:57:32,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:32,163 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:57:32,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:32,163 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:32,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:32,164 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:57:32,164 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:57:32,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:32,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:57:32,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-26 21:57:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:32,287 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:32,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:32,287 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:32,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:32,288 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:32,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:32,288 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:32,288 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:32,288 INFO L423 AbstractCegarLoop]: === Iteration 167 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:32,288 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:32,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1021893757, now seen corresponding path program 153 times [2018-09-26 21:57:32,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:32,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:32,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:32,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:32,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:32,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:32,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:32,346 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:57:32,354 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:57:32,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:32,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:32,399 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:32,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:32,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:32,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:32,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:32,420 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:32,420 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:32,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:32,760 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:57:32,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:32,760 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:32,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:32,761 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:57:32,761 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:57:32,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:32,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:57:32,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-09-26 21:57:32,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:57:32,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:57:32,862 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-26 21:57:32,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:32,862 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:57:32,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:32,862 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:57:32,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:32,862 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:32,862 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:32,863 INFO L423 AbstractCegarLoop]: === Iteration 168 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:32,863 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:32,863 INFO L82 PathProgramCache]: Analyzing trace with hash -74904199, now seen corresponding path program 154 times [2018-09-26 21:57:32,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:32,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:32,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:32,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:32,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:32,909 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:32,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:32,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:32,917 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:57:32,940 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:57:32,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:32,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:32,998 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:32,998 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:32,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:32,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:32,999 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:32,999 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-26 21:57:33,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:33,388 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:57:33,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:33,390 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:33,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:33,390 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:57:33,390 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:57:33,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:33,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:57:33,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:57:33,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:33,512 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:33,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:33,512 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:33,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:33,512 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:33,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:33,512 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:33,512 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:33,513 INFO L423 AbstractCegarLoop]: === Iteration 169 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:33,513 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:33,513 INFO L82 PathProgramCache]: Analyzing trace with hash -74902277, now seen corresponding path program 155 times [2018-09-26 21:57:33,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:33,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:33,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:33,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:33,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:33,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:33,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:33,572 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:57:33,578 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:57:33,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:33,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:33,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:33,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:33,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:33,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:33,634 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:33,634 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:34,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:34,025 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:57:34,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:34,025 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:34,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:34,026 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:57:34,026 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:57:34,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:34,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:57:34,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-26 21:57:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:34,148 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:57:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:34,148 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:34,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:34,149 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:34,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:34,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:34,149 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:34,149 INFO L423 AbstractCegarLoop]: === Iteration 170 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:34,149 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:34,149 INFO L82 PathProgramCache]: Analyzing trace with hash -73057157, now seen corresponding path program 156 times [2018-09-26 21:57:34,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:34,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:34,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:34,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:34,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:34,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:34,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:34,238 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:57:34,246 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:57:34,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:34,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:34,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:34,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:34,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:34,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:34,330 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:34,330 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:57:34,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:34,752 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:57:34,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:34,752 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:34,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:34,753 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:57:34,753 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:57:34,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:34,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:57:34,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:57:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:34,883 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:34,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:34,884 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:34,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:34,884 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:34,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:34,884 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:34,884 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:34,884 INFO L423 AbstractCegarLoop]: === Iteration 171 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:34,884 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:34,884 INFO L82 PathProgramCache]: Analyzing trace with hash -73055235, now seen corresponding path program 157 times [2018-09-26 21:57:34,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:34,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:34,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:34,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:34,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:34,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:34,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:34,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:34,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:35,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:35,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:35,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:35,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:35,017 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:35,017 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:35,403 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:57:35,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:35,404 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:35,404 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:57:35,404 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:57:35,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:35,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:57:35,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-26 21:57:35,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:57:35,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:57:35,513 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:57:35,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:35,513 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:57:35,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:35,513 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:57:35,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:35,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:35,513 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:35,514 INFO L423 AbstractCegarLoop]: === Iteration 172 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:35,514 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:35,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1700103163, now seen corresponding path program 158 times [2018-09-26 21:57:35,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:35,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:35,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:35,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:35,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:35,561 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:35,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:35,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:57:35,574 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:57:35,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:35,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:35,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:35,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:35,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:35,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:35,636 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:35,636 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:57:35,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:35,998 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:57:35,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:35,998 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:35,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:35,999 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:57:35,999 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:57:35,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:35,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:57:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-26 21:57:36,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:36,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:36,122 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:36,122 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:36,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:36,122 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:36,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:36,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:36,123 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:36,123 INFO L423 AbstractCegarLoop]: === Iteration 173 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:36,123 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:36,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1700105085, now seen corresponding path program 159 times [2018-09-26 21:57:36,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:36,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:36,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:36,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:36,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:36,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:36,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:36,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:57:36,187 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:57:36,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:36,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:36,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:36,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:36,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:36,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:36,263 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:36,263 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:36,631 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:57:36,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:36,631 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:36,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:36,631 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:57:36,632 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:57:36,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:36,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:57:36,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-26 21:57:36,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:36,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:36,754 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:57:36,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:36,754 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:36,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:36,754 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:36,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:36,755 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:36,755 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:36,755 INFO L423 AbstractCegarLoop]: === Iteration 174 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:36,755 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:36,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1701950205, now seen corresponding path program 160 times [2018-09-26 21:57:36,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:36,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:36,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:36,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:36,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:36,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:36,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:36,815 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:57:36,823 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:57:36,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:36,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:36,898 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:36,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:36,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:36,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:36,898 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:36,898 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:57:37,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:37,274 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:57:37,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:37,274 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:37,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:37,275 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:57:37,275 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:57:37,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:37,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:57:37,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-26 21:57:37,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:37,397 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:37,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:37,397 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:37,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:37,397 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:37,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:37,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:37,397 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:37,397 INFO L423 AbstractCegarLoop]: === Iteration 175 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:37,397 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:37,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1701952127, now seen corresponding path program 161 times [2018-09-26 21:57:37,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:37,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:37,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:37,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:37,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:37,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:37,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:37,522 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:57:37,547 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:57:37,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:37,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:37,598 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:37,599 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:37,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:37,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:37,599 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:37,599 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:38,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:38,295 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:57:38,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:38,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:38,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:38,296 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:57:38,296 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:57:38,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:38,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:57:38,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-09-26 21:57:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:57:38,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:57:38,384 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-26 21:57:38,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:38,384 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:57:38,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:38,384 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:57:38,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:38,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:38,384 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:38,384 INFO L423 AbstractCegarLoop]: === Iteration 176 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:38,384 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:38,385 INFO L82 PathProgramCache]: Analyzing trace with hash -53897991, now seen corresponding path program 162 times [2018-09-26 21:57:38,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:38,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:38,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:38,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:38,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:38,430 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:38,430 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:38,443 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:57:38,451 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:57:38,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:38,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:38,518 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:38,518 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:38,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:38,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:38,518 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:38,519 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-26 21:57:38,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:38,876 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:57:38,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:38,877 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:38,877 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:57:38,877 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:57:38,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:57:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-26 21:57:39,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:39,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:39,009 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:39,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:39,009 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:39,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:39,010 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:39,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:39,010 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:39,010 INFO L423 AbstractCegarLoop]: === Iteration 177 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:39,010 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:39,010 INFO L82 PathProgramCache]: Analyzing trace with hash -53896069, now seen corresponding path program 163 times [2018-09-26 21:57:39,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:39,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:39,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:39,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:39,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:39,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:39,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:39,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:39,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:39,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:39,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:39,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:39,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:39,207 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:39,208 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:39,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:39,613 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:57:39,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:39,614 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:39,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:39,614 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:57:39,614 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:57:39,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:39,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:57:39,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-26 21:57:39,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:39,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:39,744 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:57:39,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:39,745 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:39,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:39,745 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:39,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:39,745 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:39,745 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:39,745 INFO L423 AbstractCegarLoop]: === Iteration 178 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:39,745 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:39,745 INFO L82 PathProgramCache]: Analyzing trace with hash -52050949, now seen corresponding path program 164 times [2018-09-26 21:57:39,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:39,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:39,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:39,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:39,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:39,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:39,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:39,807 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:57:39,815 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:57:39,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:39,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:39,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:39,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:39,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:39,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:39,895 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:39,895 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:57:40,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:40,255 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:57:40,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:40,255 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:40,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:40,255 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:57:40,256 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:57:40,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:40,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:57:40,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-26 21:57:40,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:40,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:40,391 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:40,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:40,391 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:40,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:40,391 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:40,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:40,391 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:40,391 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:40,391 INFO L423 AbstractCegarLoop]: === Iteration 179 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:40,391 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:40,392 INFO L82 PathProgramCache]: Analyzing trace with hash -52049027, now seen corresponding path program 165 times [2018-09-26 21:57:40,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:40,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:40,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:40,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:40,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:40,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:40,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:40,455 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:57:40,464 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:57:40,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:40,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:40,519 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:40,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:40,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:40,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:40,520 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:40,520 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:40,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:40,889 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:57:40,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:40,890 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:40,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:40,890 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:57:40,890 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:57:40,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:40,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:57:41,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-26 21:57:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:57:41,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:57:41,010 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:57:41,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:41,010 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:57:41,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:41,010 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:57:41,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:41,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:41,010 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:41,011 INFO L423 AbstractCegarLoop]: === Iteration 180 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:41,011 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:41,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1721109371, now seen corresponding path program 166 times [2018-09-26 21:57:41,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:41,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:41,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:41,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:41,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:41,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:41,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:41,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:41,066 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:57:41,072 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:57:41,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:41,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:41,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:41,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:41,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:41,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:41,129 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:41,130 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:57:41,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:41,512 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:57:41,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:41,513 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:41,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:41,513 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:57:41,513 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:57:41,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:41,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:57:41,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-26 21:57:41,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:41,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:41,655 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:41,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:41,656 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:41,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:41,656 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:41,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:41,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:41,656 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:41,656 INFO L423 AbstractCegarLoop]: === Iteration 181 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:41,656 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:41,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1721111293, now seen corresponding path program 167 times [2018-09-26 21:57:41,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:41,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:41,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:41,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:41,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:41,707 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:41,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:41,718 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:57:41,728 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:57:41,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:41,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:41,795 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:41,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:41,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:41,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:41,796 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:41,796 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:42,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:42,169 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:57:42,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:42,170 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:42,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:42,170 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:57:42,170 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:57:42,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:57:42,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-26 21:57:42,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:42,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:42,300 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:57:42,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:42,300 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:42,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:42,300 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:42,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:42,300 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:42,300 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:42,301 INFO L423 AbstractCegarLoop]: === Iteration 182 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:42,301 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:42,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1722956413, now seen corresponding path program 168 times [2018-09-26 21:57:42,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:42,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:42,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:42,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:42,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:42,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:42,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:42,358 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:57:42,367 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:57:42,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:42,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:42,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:42,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:42,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:42,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:42,424 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:42,424 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:57:42,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:42,788 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:57:42,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:42,789 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:42,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:42,789 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:57:42,789 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:57:42,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:42,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:57:42,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-26 21:57:42,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:42,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:42,928 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:42,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:42,928 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:42,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:42,928 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:42,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:42,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:42,929 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:42,929 INFO L423 AbstractCegarLoop]: === Iteration 183 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:42,929 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:42,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1722958335, now seen corresponding path program 169 times [2018-09-26 21:57:42,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:42,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:42,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:42,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:42,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:42,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:42,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:42,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:42,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:43,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:43,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:43,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:43,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:43,058 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:43,059 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:43,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:43,398 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:57:43,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:43,398 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:43,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:43,399 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:57:43,399 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:57:43,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:43,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:57:43,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-26 21:57:43,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:57:43,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:57:43,514 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-26 21:57:43,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:43,514 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:57:43,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:43,514 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:57:43,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:43,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:43,514 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:43,515 INFO L423 AbstractCegarLoop]: === Iteration 184 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:43,515 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:43,515 INFO L82 PathProgramCache]: Analyzing trace with hash 626160379, now seen corresponding path program 170 times [2018-09-26 21:57:43,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:43,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:43,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:43,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:43,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:43,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:43,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:43,646 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:57:43,651 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:57:43,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:43,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:43,709 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:43,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:43,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:43,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:43,710 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:43,710 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-26 21:57:44,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:44,046 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:57:44,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:44,046 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:44,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:44,047 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:57:44,047 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:57:44,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:44,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:57:44,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-26 21:57:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:44,179 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:44,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:44,180 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:44,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:44,180 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:44,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:44,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:44,180 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:44,180 INFO L423 AbstractCegarLoop]: === Iteration 185 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:44,180 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:44,180 INFO L82 PathProgramCache]: Analyzing trace with hash 626162301, now seen corresponding path program 171 times [2018-09-26 21:57:44,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:44,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:44,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:44,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:44,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:44,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:44,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:44,243 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:57:44,251 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:57:44,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:44,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:44,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:44,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:44,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:44,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:44,318 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:44,318 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:44,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:44,754 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:57:44,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:44,754 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:44,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:44,755 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:57:44,755 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:57:44,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:44,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:57:44,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-26 21:57:44,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:44,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:44,885 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:57:44,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:44,885 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:44,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:44,886 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:44,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:44,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:44,886 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:44,886 INFO L423 AbstractCegarLoop]: === Iteration 186 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:44,886 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:44,886 INFO L82 PathProgramCache]: Analyzing trace with hash 628007421, now seen corresponding path program 172 times [2018-09-26 21:57:44,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:44,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:44,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:44,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:44,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:44,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:44,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:44,944 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:57:44,950 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:57:44,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:44,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:45,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:45,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:45,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:45,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:45,019 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:45,019 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:57:45,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:45,375 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:57:45,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:45,375 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:45,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:45,376 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:57:45,376 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:57:45,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:45,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:57:45,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-26 21:57:45,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:45,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:45,514 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:45,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:45,515 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:45,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:45,515 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:45,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:45,515 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:45,515 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:45,515 INFO L423 AbstractCegarLoop]: === Iteration 187 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:45,515 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:45,515 INFO L82 PathProgramCache]: Analyzing trace with hash 628009343, now seen corresponding path program 173 times [2018-09-26 21:57:45,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:45,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:45,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:45,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:45,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:45,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:45,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:45,577 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:57:45,586 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:57:45,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:45,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:45,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:45,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:45,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:45,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:45,667 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:45,667 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:46,001 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:57:46,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:46,002 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:46,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:46,002 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:57:46,002 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:57:46,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:46,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:57:46,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-26 21:57:46,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:57:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:57:46,131 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:57:46,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:46,131 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:57:46,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:46,131 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:57:46,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:46,131 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:46,131 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:46,131 INFO L423 AbstractCegarLoop]: === Iteration 188 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:46,132 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:46,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1893799555, now seen corresponding path program 174 times [2018-09-26 21:57:46,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:46,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:46,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:46,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:46,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:46,186 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:46,186 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:46,193 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:57:46,219 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:57:46,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:46,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:46,282 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:46,282 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:46,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:46,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:46,282 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:46,282 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:57:46,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:46,618 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:57:46,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:46,619 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:46,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:46,619 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:57:46,619 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:57:46,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:46,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:57:46,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-09-26 21:57:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:46,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:46,757 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:46,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:46,758 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:46,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:46,758 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:46,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:46,758 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:46,758 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:46,758 INFO L423 AbstractCegarLoop]: === Iteration 189 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:46,758 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:46,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1893797633, now seen corresponding path program 175 times [2018-09-26 21:57:46,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:46,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:46,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:46,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:46,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:46,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:46,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:46,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:46,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:46,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:46,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:46,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:46,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:46,900 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:46,900 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:47,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:47,224 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:57:47,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:47,224 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:47,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:47,225 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:57:47,225 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:57:47,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:47,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:57:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-09-26 21:57:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:47,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:47,362 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:57:47,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:47,362 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:47,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:47,362 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:47,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:47,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:47,362 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:47,362 INFO L423 AbstractCegarLoop]: === Iteration 190 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:47,362 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:47,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1891952513, now seen corresponding path program 176 times [2018-09-26 21:57:47,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:47,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:47,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:47,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:47,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:47,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:47,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:47,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:57:47,430 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:57:47,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:47,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:47,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:47,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:47,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:47,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:47,498 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:47,498 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:57:47,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:47,810 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:57:47,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:47,810 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:47,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:47,810 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:57:47,811 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:57:47,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:47,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:57:47,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-09-26 21:57:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:47,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:47,950 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:47,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:47,950 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:47,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:47,950 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:47,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:47,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:47,951 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:57:47,951 INFO L423 AbstractCegarLoop]: === Iteration 191 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:47,951 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:47,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1891950591, now seen corresponding path program 177 times [2018-09-26 21:57:47,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:47,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:47,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:47,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:47,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:48,006 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:48,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:48,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:48,016 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:57:48,025 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:57:48,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:48,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:48,079 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:48,079 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:48,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:48,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:48,079 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:48,079 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:48,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:48,361 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-09-26 21:57:48,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:48,362 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:48,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:48,362 INFO L225 Difference]: With dead ends: 34 [2018-09-26 21:57:48,362 INFO L226 Difference]: Without dead ends: 32 [2018-09-26 21:57:48,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:48,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-26 21:57:48,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-09-26 21:57:48,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:57:48,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:57:48,454 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-26 21:57:48,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:48,454 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:57:48,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:48,454 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:57:48,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:48,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:48,454 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:57:48,454 INFO L423 AbstractCegarLoop]: === Iteration 192 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:48,454 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:48,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1448020233, now seen corresponding path program 178 times [2018-09-26 21:57:48,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:48,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:48,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:48,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:48,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:48,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:48,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:48,543 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:57:48,553 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:57:48,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:48,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:48,610 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:48,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:48,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:48,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:48,611 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:48,611 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-09-26 21:57:49,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:49,088 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:57:49,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:49,088 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:49,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:49,089 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:57:49,089 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:57:49,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:49,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:57:49,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-26 21:57:49,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:57:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:57:49,253 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:57:49,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:49,253 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:57:49,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:49,254 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:57:49,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:49,254 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:49,254 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:49,254 INFO L423 AbstractCegarLoop]: === Iteration 193 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:49,254 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:49,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1448018311, now seen corresponding path program 179 times [2018-09-26 21:57:49,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:49,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:49,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:49,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:49,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:49,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:49,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:49,317 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:57:49,325 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:57:49,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:49,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:49,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:49,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:49,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:49,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:49,396 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:49,397 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:57:49,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:49,910 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:57:49,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:49,910 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:49,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:49,910 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:57:49,910 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:57:49,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:49,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:57:50,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-26 21:57:50,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:50,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:50,074 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:50,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:50,074 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:50,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:50,074 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:50,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:50,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:50,075 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:50,075 INFO L423 AbstractCegarLoop]: === Iteration 194 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:50,075 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:50,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1446173191, now seen corresponding path program 180 times [2018-09-26 21:57:50,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:50,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:50,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:50,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:50,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:50,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:50,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:50,135 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:57:50,144 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:57:50,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:50,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:50,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:50,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:50,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:50,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:50,214 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:50,214 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:50,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:50,710 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:57:50,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:50,710 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:50,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:50,711 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:57:50,711 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:57:50,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:50,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:57:50,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-26 21:57:50,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:57:50,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:57:50,898 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:57:50,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:50,898 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:57:50,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:50,899 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:57:50,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:50,899 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:50,899 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:50,899 INFO L423 AbstractCegarLoop]: === Iteration 195 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:50,899 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:50,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1446171269, now seen corresponding path program 181 times [2018-09-26 21:57:50,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:50,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:50,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:50,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:50,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:50,965 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:50,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:50,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:50,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:51,001 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:51,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:51,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:51,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:51,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:51,022 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:51,023 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:57:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:51,518 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:57:51,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:51,523 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:51,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:51,523 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:57:51,523 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:57:51,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:51,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:57:51,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-09-26 21:57:51,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:51,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:51,678 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:57:51,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:51,678 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:51,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:51,678 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:51,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:51,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:51,678 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:51,678 INFO L423 AbstractCegarLoop]: === Iteration 196 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:51,678 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:51,678 INFO L82 PathProgramCache]: Analyzing trace with hash 326987129, now seen corresponding path program 182 times [2018-09-26 21:57:51,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:51,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:51,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:51,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:51,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:51,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:51,725 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:51,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:57:51,739 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:57:51,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:51,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:51,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:51,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:51,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:51,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:51,797 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:51,797 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:57:52,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:52,312 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:57:52,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:52,312 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:52,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:52,313 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:57:52,313 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:57:52,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:52,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:57:52,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-26 21:57:52,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:57:52,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:57:52,476 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:57:52,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:52,477 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:57:52,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:52,477 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:57:52,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:52,477 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:52,477 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:52,477 INFO L423 AbstractCegarLoop]: === Iteration 197 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:52,477 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:52,477 INFO L82 PathProgramCache]: Analyzing trace with hash 326989051, now seen corresponding path program 183 times [2018-09-26 21:57:52,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:52,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:52,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:52,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:52,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:52,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:52,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:52,535 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:57:52,543 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:57:52,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:52,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:52,598 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:52,598 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:52,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:52,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:52,599 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:52,599 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:57:53,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:53,127 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:57:53,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:53,127 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:53,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:53,128 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:57:53,128 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:57:53,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:53,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:57:53,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-26 21:57:53,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:53,292 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:53,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:53,293 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:53,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:53,293 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:53,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:53,293 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:53,293 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:53,293 INFO L423 AbstractCegarLoop]: === Iteration 198 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:53,293 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:53,293 INFO L82 PathProgramCache]: Analyzing trace with hash 328834171, now seen corresponding path program 184 times [2018-09-26 21:57:53,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:53,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:53,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:53,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:53,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:53,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:53,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:53,351 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:57:53,379 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:57:53,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:53,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:53,661 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:53,683 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:53,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:53,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:53,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:53,683 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:53,683 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:54,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:54,159 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:57:54,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:54,159 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:54,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:54,160 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:57:54,160 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:57:54,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:54,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:57:54,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-26 21:57:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:57:54,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:57:54,327 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:57:54,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:54,327 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:57:54,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:54,328 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:57:54,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:54,328 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:54,328 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:54,328 INFO L423 AbstractCegarLoop]: === Iteration 199 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:54,328 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:54,328 INFO L82 PathProgramCache]: Analyzing trace with hash 328836093, now seen corresponding path program 185 times [2018-09-26 21:57:54,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:54,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:54,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:54,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:54,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:54,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:54,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:54,386 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:57:54,396 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:57:54,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:54,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:54,475 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:54,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:54,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:54,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:54,476 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:54,476 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:57:55,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:55,230 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:57:55,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:55,230 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:55,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:55,230 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:57:55,230 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:57:55,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:55,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:57:55,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-09-26 21:57:55,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:57:55,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:57:55,367 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:57:55,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:55,367 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:57:55,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:57:55,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:55,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:55,368 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:57:55,368 INFO L423 AbstractCegarLoop]: === Iteration 200 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:55,368 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:55,368 INFO L82 PathProgramCache]: Analyzing trace with hash -767961863, now seen corresponding path program 186 times [2018-09-26 21:57:55,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:55,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:55,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:55,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:55,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:55,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:55,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:55,977 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:57:56,074 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:57:56,075 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:56,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:56,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:56,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:56,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:56,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:56,617 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:56,617 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:57:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:57,423 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:57:57,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:57,423 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:57,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:57,423 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:57:57,424 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:57:57,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:57,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:57:57,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-26 21:57:57,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:57:57,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:57:57,589 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:57:57,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:57,589 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:57:57,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:57,589 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:57:57,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:57,589 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:57,589 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:57,589 INFO L423 AbstractCegarLoop]: === Iteration 201 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:57,590 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:57,590 INFO L82 PathProgramCache]: Analyzing trace with hash -767959941, now seen corresponding path program 187 times [2018-09-26 21:57:57,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:57,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:57,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:57,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:57,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:57,638 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:57,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:57,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:57,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:57,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:57,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:57,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:57,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:57,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:57,707 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:57,707 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:57:58,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:58,189 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:57:58,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:58,189 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:58,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:58,190 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:57:58,190 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:57:58,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:58,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:57:58,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-26 21:57:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:57:58,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:57:58,348 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:57:58,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:58,348 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:57:58,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:58,348 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:57:58,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:58,348 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:58,348 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:58,349 INFO L423 AbstractCegarLoop]: === Iteration 202 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:58,349 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:58,349 INFO L82 PathProgramCache]: Analyzing trace with hash -766114821, now seen corresponding path program 188 times [2018-09-26 21:57:58,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:58,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:58,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:58,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:57:58,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:58,446 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:58,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:58,455 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:57:58,460 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:57:58,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:58,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:58,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:58,505 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:58,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:58,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:58,506 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:58,506 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:57:59,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:59,003 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:57:59,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:59,004 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:59,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:59,004 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:57:59,004 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:57:59,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:59,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:57:59,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-26 21:57:59,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:57:59,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:57:59,175 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:57:59,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:59,175 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:57:59,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:59,175 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:57:59,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:59,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:59,175 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:59,176 INFO L423 AbstractCegarLoop]: === Iteration 203 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:59,176 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:59,176 INFO L82 PathProgramCache]: Analyzing trace with hash -766112899, now seen corresponding path program 189 times [2018-09-26 21:57:59,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:59,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:59,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:59,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:59,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:57:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:59,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:57:59,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:57:59,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:57:59,250 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:57:59,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:57:59,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:57:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:57:59,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:57:59,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:57:59,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:57:59,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:57:59,328 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:57:59,328 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:57:59,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:57:59,840 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:57:59,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:57:59,840 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:57:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:57:59,841 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:57:59,841 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:57:59,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:57:59,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:57:59,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-09-26 21:57:59,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:57:59,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:57:59,993 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:57:59,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:57:59,993 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:57:59,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:57:59,993 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:57:59,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:57:59,993 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:57:59,993 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:57:59,993 INFO L423 AbstractCegarLoop]: === Iteration 204 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:57:59,993 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:57:59,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1007045499, now seen corresponding path program 190 times [2018-09-26 21:57:59,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:57:59,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:57:59,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:59,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:57:59,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:57:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:00,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:00,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:00,070 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:00,075 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:00,075 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:00,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:00,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:00,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:00,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:00,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:00,142 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:00,142 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:58:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:00,617 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:58:00,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:00,618 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:00,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:00,618 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:58:00,618 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:58:00,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:00,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:58:00,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-26 21:58:00,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:00,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:00,787 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:00,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:00,787 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:00,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:00,787 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:00,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:00,788 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:00,788 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:00,788 INFO L423 AbstractCegarLoop]: === Iteration 205 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:00,788 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:00,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1007047421, now seen corresponding path program 191 times [2018-09-26 21:58:00,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:00,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:00,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:00,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:00,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:00,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:00,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:00,846 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:00,854 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:58:00,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:00,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:00,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:00,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:00,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:00,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:00,913 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:00,913 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:01,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:01,396 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:58:01,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:01,396 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:01,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:01,396 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:58:01,396 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:58:01,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:01,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:58:01,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:58:01,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:58:01,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:58:01,565 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:58:01,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:01,566 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:58:01,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:01,566 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:58:01,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:01,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:01,566 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:01,566 INFO L423 AbstractCegarLoop]: === Iteration 206 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:01,566 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:01,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1008892541, now seen corresponding path program 192 times [2018-09-26 21:58:01,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:01,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:01,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:01,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:01,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:01,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:01,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:01,623 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:01,632 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:58:01,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:01,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:01,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:01,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:01,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:01,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:01,698 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:01,698 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:58:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:02,158 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:58:02,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:02,159 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:02,159 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:58:02,159 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:58:02,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:02,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:58:02,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-26 21:58:02,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:02,340 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:02,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:02,340 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:02,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:02,340 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:02,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:02,341 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:02,341 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:58:02,341 INFO L423 AbstractCegarLoop]: === Iteration 207 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:02,341 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:02,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1008894463, now seen corresponding path program 193 times [2018-09-26 21:58:02,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:02,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:02,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:02,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:02,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:02,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:02,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:02,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:02,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:02,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:02,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:02,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:02,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:02,472 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:02,472 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:02,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:02,901 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:58:02,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:02,901 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:02,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:02,902 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:58:02,902 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:58:02,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:02,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:58:03,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-26 21:58:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:58:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:58:03,038 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-26 21:58:03,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:03,038 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:58:03,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:58:03,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:03,039 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:03,039 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:58:03,039 INFO L423 AbstractCegarLoop]: === Iteration 208 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:03,039 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:03,039 INFO L82 PathProgramCache]: Analyzing trace with hash -746955655, now seen corresponding path program 194 times [2018-09-26 21:58:03,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:03,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:03,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:03,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:03,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:03,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:03,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:03,095 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:03,100 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:03,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:03,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:03,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:03,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:03,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:03,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:03,153 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:03,154 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-26 21:58:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:03,685 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:58:03,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:03,686 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:03,686 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:58:03,686 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:58:03,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:58:03,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-26 21:58:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:03,865 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:03,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:03,865 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:03,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:03,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:03,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:03,866 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:03,866 INFO L423 AbstractCegarLoop]: === Iteration 209 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:03,866 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:03,866 INFO L82 PathProgramCache]: Analyzing trace with hash -746953733, now seen corresponding path program 195 times [2018-09-26 21:58:03,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:03,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:03,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:03,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:03,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:03,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:03,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:03,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:03,932 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:58:03,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:03,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:03,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:03,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:03,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:03,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:03,986 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:03,986 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:04,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:04,544 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:58:04,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:04,544 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:04,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:04,544 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:58:04,544 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:58:04,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:04,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:58:04,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-26 21:58:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:58:04,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:58:04,717 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:58:04,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:04,717 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:58:04,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:04,717 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:58:04,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:04,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:04,718 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:04,718 INFO L423 AbstractCegarLoop]: === Iteration 210 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:04,718 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:04,718 INFO L82 PathProgramCache]: Analyzing trace with hash -745108613, now seen corresponding path program 196 times [2018-09-26 21:58:04,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:04,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:04,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:04,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:04,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:04,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:04,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:04,775 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:04,781 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:04,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:04,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:04,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:04,859 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:04,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:04,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:04,859 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:04,859 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:58:05,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:05,425 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:58:05,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:05,425 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:05,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:05,425 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:58:05,425 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:58:05,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:05,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:58:05,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-26 21:58:05,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:05,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:05,608 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:05,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:05,608 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:05,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:05,609 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:05,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:05,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:05,609 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:05,609 INFO L423 AbstractCegarLoop]: === Iteration 211 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:05,609 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:05,609 INFO L82 PathProgramCache]: Analyzing trace with hash -745106691, now seen corresponding path program 197 times [2018-09-26 21:58:05,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:05,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:05,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:05,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:05,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:05,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:05,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:05,665 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:05,674 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:58:05,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:05,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:05,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:05,732 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:05,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:05,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:05,732 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:05,732 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:06,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:06,243 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:58:06,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:06,243 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:06,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:06,244 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:58:06,244 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:58:06,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:06,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:58:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-09-26 21:58:06,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:58:06,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:58:06,415 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:58:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:06,415 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:58:06,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:06,415 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:58:06,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:06,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:06,415 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:06,416 INFO L423 AbstractCegarLoop]: === Iteration 212 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:06,416 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:06,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1028051707, now seen corresponding path program 198 times [2018-09-26 21:58:06,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:06,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:06,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:06,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:06,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:06,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:06,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:06,474 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:06,482 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:58:06,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:06,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:06,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:06,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:06,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:06,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:06,554 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:06,554 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:58:07,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:07,087 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:58:07,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:07,087 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:07,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:07,087 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:58:07,087 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:58:07,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:07,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:58:07,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-26 21:58:07,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:07,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:07,273 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:07,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:07,273 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:07,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:07,273 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:07,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:07,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:07,273 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:07,273 INFO L423 AbstractCegarLoop]: === Iteration 213 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:07,273 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:07,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1028053629, now seen corresponding path program 199 times [2018-09-26 21:58:07,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:07,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:07,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:07,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:07,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:07,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:07,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:07,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:07,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:07,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:07,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:07,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:07,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:07,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:07,441 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:07,441 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:08,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:08,002 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:58:08,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:08,002 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:08,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:08,003 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:58:08,003 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:58:08,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:08,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:58:08,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-26 21:58:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:58:08,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:58:08,180 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:58:08,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:08,180 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:58:08,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:08,180 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:58:08,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:08,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:08,180 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:08,180 INFO L423 AbstractCegarLoop]: === Iteration 214 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:08,181 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:08,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1029898749, now seen corresponding path program 200 times [2018-09-26 21:58:08,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:08,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:08,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:08,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:08,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:08,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:08,242 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:08,250 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:08,254 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:08,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:08,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:08,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:08,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:08,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:08,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:08,316 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:08,316 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:58:08,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:08,842 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:58:08,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:08,842 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:08,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:08,842 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:58:08,842 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:58:08,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:08,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:58:09,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-26 21:58:09,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:09,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:09,027 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:09,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:09,027 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:09,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:09,028 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:09,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:09,028 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:09,028 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:58:09,028 INFO L423 AbstractCegarLoop]: === Iteration 215 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:09,028 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:09,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1029900671, now seen corresponding path program 201 times [2018-09-26 21:58:09,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:09,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:09,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:09,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:09,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:09,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:09,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:09,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:09,094 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:58:09,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:09,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:09,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:09,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:09,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:09,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:09,160 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:09,160 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:09,678 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:58:09,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:09,678 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:09,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:09,679 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:58:09,679 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:58:09,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:58:09,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-09-26 21:58:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:58:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:58:09,832 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:58:09,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:09,832 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:58:09,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:09,832 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:58:09,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:09,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:09,832 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:09,832 INFO L423 AbstractCegarLoop]: === Iteration 216 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:09,832 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:09,833 INFO L82 PathProgramCache]: Analyzing trace with hash -66897285, now seen corresponding path program 202 times [2018-09-26 21:58:09,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:09,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:09,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:09,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:09,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:09,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:09,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:09,894 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:09,899 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:09,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:09,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:09,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:09,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:09,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:09,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:09,980 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:09,980 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:58:10,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:10,519 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:58:10,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:10,520 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:10,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:10,520 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:58:10,520 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:58:10,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:10,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:58:10,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-26 21:58:10,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:10,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:10,710 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:10,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:10,711 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:10,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:10,711 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:10,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:10,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:10,711 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:10,711 INFO L423 AbstractCegarLoop]: === Iteration 217 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:10,711 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:10,712 INFO L82 PathProgramCache]: Analyzing trace with hash -66895363, now seen corresponding path program 203 times [2018-09-26 21:58:10,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:10,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:10,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:10,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:10,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:10,759 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:10,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:10,767 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:10,774 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:58:10,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:10,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:10,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:10,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:10,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:10,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:10,846 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:10,846 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:11,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:11,359 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:58:11,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:11,360 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:11,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:11,360 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:58:11,360 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:58:11,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:11,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:58:11,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-26 21:58:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:58:11,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:58:11,546 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:58:11,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:11,546 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:58:11,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:11,546 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:58:11,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:11,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:11,547 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:11,547 INFO L423 AbstractCegarLoop]: === Iteration 218 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:11,547 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:11,547 INFO L82 PathProgramCache]: Analyzing trace with hash -65050243, now seen corresponding path program 204 times [2018-09-26 21:58:11,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:11,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:11,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:11,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:11,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:11,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:11,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:11,795 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:11,806 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:58:11,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:11,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:11,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:11,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:11,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:11,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:11,851 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:11,851 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:58:12,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:12,374 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:58:12,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:12,374 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:12,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:12,374 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:58:12,374 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:58:12,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:12,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:58:12,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-26 21:58:12,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:12,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:12,561 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:12,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:12,561 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:12,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:12,561 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:12,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:12,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:12,561 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:58:12,561 INFO L423 AbstractCegarLoop]: === Iteration 219 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:12,561 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:12,562 INFO L82 PathProgramCache]: Analyzing trace with hash -65048321, now seen corresponding path program 205 times [2018-09-26 21:58:12,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:12,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:12,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:12,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:12,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:12,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:12,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:12,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:12,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:12,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:12,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:12,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:12,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:12,703 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:12,703 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:13,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:13,216 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:58:13,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:13,217 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:13,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:13,217 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:58:13,217 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:58:13,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:13,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:58:13,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-09-26 21:58:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:58:13,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:58:13,392 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:58:13,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:13,392 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:58:13,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:13,392 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:58:13,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:13,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:13,392 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:13,393 INFO L423 AbstractCegarLoop]: === Iteration 220 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:13,393 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:13,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1708110077, now seen corresponding path program 206 times [2018-09-26 21:58:13,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:13,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:13,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:13,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:13,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:13,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:13,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:13,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:13,461 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:13,461 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:13,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:13,513 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:13,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:13,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:13,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:13,514 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:13,514 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:58:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:13,981 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:58:13,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:13,981 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:13,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:13,982 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:58:13,982 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:58:13,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:13,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:58:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-26 21:58:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:14,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:14,180 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:14,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:14,180 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:14,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:14,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:14,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:14,180 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:58:14,181 INFO L423 AbstractCegarLoop]: === Iteration 221 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:14,181 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:14,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1708111999, now seen corresponding path program 207 times [2018-09-26 21:58:14,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:14,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:14,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:14,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:14,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:14,253 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:14,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:14,261 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:14,270 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:58:14,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:14,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:14,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:14,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:14,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:14,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:14,331 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:14,331 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:14,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:14,836 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:58:14,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:14,837 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:14,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:14,837 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:58:14,837 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:58:14,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:14,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:58:15,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:58:15,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:58:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:58:15,022 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:58:15,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:15,022 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:58:15,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:15,022 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:58:15,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:15,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:15,022 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:58:15,022 INFO L423 AbstractCegarLoop]: === Iteration 222 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:15,022 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:15,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1709957119, now seen corresponding path program 208 times [2018-09-26 21:58:15,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:15,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:15,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:15,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:15,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:15,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:15,276 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:15,292 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:15,299 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:15,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:15,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:15,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:15,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:15,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:15,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:15,385 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:15,385 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:58:15,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:15,879 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:58:15,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:15,879 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:15,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:15,880 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:58:15,880 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:58:15,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:15,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:58:16,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-26 21:58:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:16,072 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:16,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:16,072 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:16,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:16,072 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:16,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:16,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:16,072 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:58:16,072 INFO L423 AbstractCegarLoop]: === Iteration 223 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:16,072 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:16,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1709959041, now seen corresponding path program 209 times [2018-09-26 21:58:16,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:16,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:16,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:16,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:16,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:16,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:16,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:16,130 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:16,139 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:58:16,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:16,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:16,202 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:16,202 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:16,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:16,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:16,202 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:16,202 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:16,638 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:58:16,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:16,638 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:16,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:16,638 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:58:16,639 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:58:16,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:16,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:58:16,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2018-09-26 21:58:16,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:58:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:58:16,759 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-26 21:58:16,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:16,759 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:58:16,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:16,759 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:58:16,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:16,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:16,760 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:58:16,760 INFO L423 AbstractCegarLoop]: === Iteration 224 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:16,760 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:16,760 INFO L82 PathProgramCache]: Analyzing trace with hash -2034826247, now seen corresponding path program 210 times [2018-09-26 21:58:16,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:16,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:16,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:16,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:16,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:16,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:16,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:16,818 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:16,825 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:58:16,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:16,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:16,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:16,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:16,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:16,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:16,888 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:16,888 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-26 21:58:17,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:17,395 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:58:17,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:17,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:17,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:17,396 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:58:17,396 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:58:17,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:58:17,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:58:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:17,605 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:17,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:17,606 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:17,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:17,606 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:17,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:17,606 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:17,606 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:17,606 INFO L423 AbstractCegarLoop]: === Iteration 225 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:17,606 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:17,607 INFO L82 PathProgramCache]: Analyzing trace with hash -2034824325, now seen corresponding path program 211 times [2018-09-26 21:58:17,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:17,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:17,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:17,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:17,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:17,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:17,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:17,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:17,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:17,733 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:17,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:17,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:17,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:17,733 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:17,733 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:18,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:18,256 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:58:18,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:18,256 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:18,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:18,256 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:58:18,257 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:58:18,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:18,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:58:18,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:58:18,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:58:18,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:58:18,454 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:58:18,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:18,454 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:58:18,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:18,454 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:58:18,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:18,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:18,454 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:18,455 INFO L423 AbstractCegarLoop]: === Iteration 226 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:18,455 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:18,455 INFO L82 PathProgramCache]: Analyzing trace with hash -2032979205, now seen corresponding path program 212 times [2018-09-26 21:58:18,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:18,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:18,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:18,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:18,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:18,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:18,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:18,514 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:18,520 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:18,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:18,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:18,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:18,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:18,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:18,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:18,577 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:18,577 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:58:19,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:19,113 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:58:19,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:19,113 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:19,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:19,113 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:58:19,113 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:58:19,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:19,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:58:19,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:58:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:19,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:19,317 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:19,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:19,317 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:19,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:19,317 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:19,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:19,317 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:19,317 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:19,318 INFO L423 AbstractCegarLoop]: === Iteration 227 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:19,318 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:19,318 INFO L82 PathProgramCache]: Analyzing trace with hash -2032977283, now seen corresponding path program 213 times [2018-09-26 21:58:19,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:19,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:19,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:19,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:19,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:19,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:19,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:19,383 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:19,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:58:19,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:19,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:19,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:19,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:19,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:19,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:19,445 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:19,445 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:19,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:19,951 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:58:19,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:19,953 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:19,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:19,953 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:58:19,953 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:58:19,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:19,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:58:20,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-09-26 21:58:20,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:58:20,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:58:20,140 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:58:20,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:20,140 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:58:20,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:20,140 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:58:20,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:20,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:20,140 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:20,141 INFO L423 AbstractCegarLoop]: === Iteration 228 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:20,141 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:20,141 INFO L82 PathProgramCache]: Analyzing trace with hash -259818885, now seen corresponding path program 214 times [2018-09-26 21:58:20,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:20,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:20,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:20,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:20,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:20,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:20,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:20,212 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:20,219 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:20,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:20,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:20,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:20,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:20,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:20,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:20,435 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:20,435 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:58:20,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:20,948 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:58:20,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:20,948 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:20,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:20,949 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:58:20,949 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:58:20,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:20,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:58:21,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-26 21:58:21,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:21,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:21,165 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:21,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:21,165 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:21,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:21,165 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:21,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:21,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:21,165 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:21,165 INFO L423 AbstractCegarLoop]: === Iteration 229 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:21,165 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:21,166 INFO L82 PathProgramCache]: Analyzing trace with hash -259816963, now seen corresponding path program 215 times [2018-09-26 21:58:21,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:21,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:21,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:21,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:21,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:21,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:21,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:21,225 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:21,234 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:58:21,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:21,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:21,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:21,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:21,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:21,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:21,303 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:21,303 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:21,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:21,794 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:58:21,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:21,794 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:21,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:21,794 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:58:21,795 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:58:21,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:21,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:58:21,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-26 21:58:21,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:58:21,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:58:21,997 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:58:21,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:21,997 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:58:21,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:21,997 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:58:21,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:21,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:21,997 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:21,997 INFO L423 AbstractCegarLoop]: === Iteration 230 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:21,998 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:21,998 INFO L82 PathProgramCache]: Analyzing trace with hash -257971843, now seen corresponding path program 216 times [2018-09-26 21:58:21,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:21,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:21,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:21,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:21,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:22,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:22,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:22,063 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:22,071 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:58:22,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:22,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:22,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:22,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:22,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:22,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:22,128 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:22,129 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:58:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:22,623 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:58:22,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:22,623 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:22,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:22,624 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:58:22,624 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:58:22,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:22,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:58:22,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-26 21:58:22,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:22,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:22,846 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:22,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:22,846 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:22,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:22,846 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:22,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:22,847 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:22,847 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:58:22,847 INFO L423 AbstractCegarLoop]: === Iteration 231 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:22,847 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:22,847 INFO L82 PathProgramCache]: Analyzing trace with hash -257969921, now seen corresponding path program 217 times [2018-09-26 21:58:22,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:22,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:22,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:22,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:22,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:22,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:22,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:22,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:22,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:22,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:22,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:22,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:22,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:22,973 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:22,973 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:23,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:23,441 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:58:23,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:23,442 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:23,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:23,442 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:58:23,443 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:58:23,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:23,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:58:23,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-26 21:58:23,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:58:23,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:58:23,616 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:58:23,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:23,616 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:58:23,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:23,616 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:58:23,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:23,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:23,616 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:23,617 INFO L423 AbstractCegarLoop]: === Iteration 232 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:23,617 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:23,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1354767877, now seen corresponding path program 218 times [2018-09-26 21:58:23,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:23,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:23,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:23,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:23,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:23,665 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:23,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:23,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:23,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:23,678 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:23,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:23,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:23,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:23,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:23,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:23,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:23,744 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:23,744 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:58:24,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:24,338 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:58:24,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:24,338 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:24,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:24,338 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:58:24,338 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:58:24,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:24,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:58:24,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:58:24,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:24,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:24,569 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:24,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:24,569 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:24,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:24,570 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:24,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:24,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:24,570 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:24,570 INFO L423 AbstractCegarLoop]: === Iteration 233 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:24,570 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:24,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1354765955, now seen corresponding path program 219 times [2018-09-26 21:58:24,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:24,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:24,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:24,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:24,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:24,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:24,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:24,633 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:24,641 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:58:24,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:24,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:25,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:25,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:25,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:25,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:25,197 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:25,197 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:26,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:26,635 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:58:26,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:26,635 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:26,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:26,636 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:58:26,636 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:58:26,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:26,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:58:26,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:58:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:58:26,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:58:26,837 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:58:26,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:26,837 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:58:26,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:26,837 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:58:26,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:26,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:26,838 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:26,838 INFO L423 AbstractCegarLoop]: === Iteration 234 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:26,838 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:26,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1352920835, now seen corresponding path program 220 times [2018-09-26 21:58:26,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:26,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:26,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:26,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:26,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:26,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:26,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:26,900 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:26,906 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:26,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:26,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:26,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:26,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:26,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:26,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:26,972 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:26,972 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:58:27,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:27,518 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:58:27,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:27,518 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:27,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:27,519 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:58:27,519 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:58:27,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:27,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:58:27,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:58:27,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:27,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:27,728 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:27,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:27,728 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:27,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:27,728 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:27,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:27,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:27,729 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:58:27,729 INFO L423 AbstractCegarLoop]: === Iteration 235 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:27,729 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:27,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1352918913, now seen corresponding path program 221 times [2018-09-26 21:58:27,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:27,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:27,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:27,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:27,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:27,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:27,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:27,785 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:27,795 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:58:27,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:27,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:27,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:27,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:27,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:27,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:27,863 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:27,863 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:28,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:28,381 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:58:28,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:28,381 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:28,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:28,382 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:58:28,382 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:58:28,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:28,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:58:28,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-09-26 21:58:28,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:58:28,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:58:28,584 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:58:28,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:28,584 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:58:28,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:28,584 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:58:28,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:28,584 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:28,585 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:28,585 INFO L423 AbstractCegarLoop]: === Iteration 236 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:28,585 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:28,585 INFO L82 PathProgramCache]: Analyzing trace with hash 420239485, now seen corresponding path program 222 times [2018-09-26 21:58:28,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:28,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:28,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:28,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:28,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:28,633 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:28,633 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:28,642 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:28,649 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:58:28,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:28,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:28,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:28,715 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:28,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:28,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:28,715 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:28,715 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:58:29,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:29,244 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:58:29,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:29,244 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:29,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:29,245 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:58:29,245 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:58:29,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:29,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:58:29,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-26 21:58:29,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:29,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:29,458 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:29,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:29,458 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:29,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:29,458 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:29,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:29,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:29,458 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:58:29,459 INFO L423 AbstractCegarLoop]: === Iteration 237 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:29,459 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:29,459 INFO L82 PathProgramCache]: Analyzing trace with hash 420241407, now seen corresponding path program 223 times [2018-09-26 21:58:29,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:29,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:29,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:29,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:29,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:30,015 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:30,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:30,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:30,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:30,604 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:30,604 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:30,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:30,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:30,605 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:30,605 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:31,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:31,226 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:58:31,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:31,226 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:31,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:31,227 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:58:31,227 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:58:31,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:31,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:58:31,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-26 21:58:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:58:31,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:58:31,429 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:58:31,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:31,430 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:58:31,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:31,430 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:58:31,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:31,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:31,430 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:58:31,430 INFO L423 AbstractCegarLoop]: === Iteration 238 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:31,430 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:31,430 INFO L82 PathProgramCache]: Analyzing trace with hash 422086527, now seen corresponding path program 224 times [2018-09-26 21:58:31,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:31,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:31,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:31,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:31,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:31,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:31,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:31,490 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:31,495 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:31,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:31,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:31,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:31,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:31,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:31,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:31,552 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:31,552 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:58:32,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:32,062 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:58:32,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:32,062 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:32,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:32,062 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:58:32,062 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:58:32,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:32,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:58:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-26 21:58:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:32,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:32,273 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:32,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:32,273 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:32,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:32,273 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:32,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:32,273 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:58:32,274 INFO L423 AbstractCegarLoop]: === Iteration 239 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:32,274 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:32,274 INFO L82 PathProgramCache]: Analyzing trace with hash 422088449, now seen corresponding path program 225 times [2018-09-26 21:58:32,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:32,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:32,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:32,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:32,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:32,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:32,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:32,333 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:32,341 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:58:32,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:32,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:32,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:32,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:32,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:32,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:32,408 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:32,408 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:32,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:32,864 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:58:32,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:32,864 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:32,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:32,864 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:58:32,864 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:58:32,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:32,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:58:33,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 24. [2018-09-26 21:58:33,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:58:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:58:33,019 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-26 21:58:33,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:33,019 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:58:33,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:33,019 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:58:33,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:33,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:33,019 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:33,019 INFO L423 AbstractCegarLoop]: === Iteration 240 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:33,019 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:33,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1333761669, now seen corresponding path program 226 times [2018-09-26 21:58:33,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:33,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:33,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:33,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:33,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:33,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:33,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:33,074 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:33,081 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:33,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:33,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:33,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:33,145 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:33,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:33,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:33,145 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:33,145 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-26 21:58:33,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:33,626 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:58:33,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:33,626 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:33,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:33,626 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:58:33,626 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:58:33,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:33,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:58:33,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-26 21:58:33,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:33,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:33,853 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:33,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:33,853 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:33,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:33,854 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:33,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:33,854 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:33,854 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:33,854 INFO L423 AbstractCegarLoop]: === Iteration 241 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:33,854 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:33,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1333759747, now seen corresponding path program 227 times [2018-09-26 21:58:33,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:33,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:33,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:33,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:33,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:33,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:33,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:33,910 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:33,921 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:58:33,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:33,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:33,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:33,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:33,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:33,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:33,978 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:33,979 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:34,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:34,482 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:58:34,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:34,482 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:34,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:34,483 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:58:34,483 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:58:34,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:58:34,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-26 21:58:34,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:58:34,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:58:34,695 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:58:34,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:34,695 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:58:34,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:34,696 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:58:34,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:34,696 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:34,696 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:34,696 INFO L423 AbstractCegarLoop]: === Iteration 242 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:34,696 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:34,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1331914627, now seen corresponding path program 228 times [2018-09-26 21:58:34,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:34,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:34,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:34,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:34,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:34,746 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:34,746 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:34,754 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:34,762 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:58:34,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:34,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:34,810 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:34,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:34,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:34,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:34,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:34,831 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:34,831 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:58:35,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:35,319 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:58:35,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:35,319 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:35,320 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:58:35,320 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:58:35,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:35,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:58:35,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-09-26 21:58:35,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:35,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:35,541 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:35,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:35,542 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:35,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:35,542 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:35,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:35,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:35,542 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:58:35,542 INFO L423 AbstractCegarLoop]: === Iteration 243 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:35,542 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:35,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1331912705, now seen corresponding path program 229 times [2018-09-26 21:58:35,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:35,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:35,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:35,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:35,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:35,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:35,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:35,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:35,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:35,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:35,696 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:35,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:35,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:35,696 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:35,696 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:36,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:36,206 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:58:36,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:36,206 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:36,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:36,206 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:58:36,207 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:58:36,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:36,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:58:36,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-26 21:58:36,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:58:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:58:36,415 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:58:36,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:36,415 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:58:36,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:36,416 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:58:36,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:36,416 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:36,416 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:36,416 INFO L423 AbstractCegarLoop]: === Iteration 244 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:36,416 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:36,416 INFO L82 PathProgramCache]: Analyzing trace with hash 441245693, now seen corresponding path program 230 times [2018-09-26 21:58:36,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:36,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:36,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:36,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:36,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:36,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:36,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:36,474 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:36,480 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:36,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:36,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:36,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:36,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:36,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:36,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:36,541 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:36,541 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:58:37,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:37,044 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:58:37,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:37,044 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:37,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:37,045 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:58:37,045 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:58:37,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:37,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:58:37,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-26 21:58:37,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:37,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:37,274 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:37,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:37,274 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:37,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:37,274 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:37,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:37,274 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:37,274 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:58:37,274 INFO L423 AbstractCegarLoop]: === Iteration 245 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:37,274 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:37,274 INFO L82 PathProgramCache]: Analyzing trace with hash 441247615, now seen corresponding path program 231 times [2018-09-26 21:58:37,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:37,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:37,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:37,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:37,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:37,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:37,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:37,339 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:37,347 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:58:37,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:37,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:37,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:37,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:37,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:37,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:37,546 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:37,547 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:38,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:38,057 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:58:38,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:38,058 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:38,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:38,058 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:58:38,058 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:58:38,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:38,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:58:38,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-26 21:58:38,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:58:38,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:58:38,272 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:58:38,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:38,272 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:58:38,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:38,273 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:58:38,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:38,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:38,273 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:58:38,273 INFO L423 AbstractCegarLoop]: === Iteration 246 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:38,273 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:38,273 INFO L82 PathProgramCache]: Analyzing trace with hash 443092735, now seen corresponding path program 232 times [2018-09-26 21:58:38,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:38,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:38,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:38,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:38,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:38,325 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:38,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:38,337 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:38,343 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:38,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:38,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:38,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:38,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:38,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:38,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:38,404 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:38,404 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:58:38,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:38,896 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:58:38,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:38,896 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:38,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:38,897 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:58:38,897 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:58:38,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:38,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:58:39,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-09-26 21:58:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:39,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:39,125 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:39,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:39,125 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:39,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:39,125 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:39,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:39,125 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:39,125 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:58:39,126 INFO L423 AbstractCegarLoop]: === Iteration 247 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:39,126 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:39,126 INFO L82 PathProgramCache]: Analyzing trace with hash 443094657, now seen corresponding path program 233 times [2018-09-26 21:58:39,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:39,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:39,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:39,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:39,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:39,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:39,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:39,183 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:39,191 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:58:39,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:39,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:39,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:39,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:39,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:39,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:39,266 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:39,266 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:39,729 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:58:39,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:39,730 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:39,730 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:58:39,730 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:58:39,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:39,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:58:39,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-26 21:58:39,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:58:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:58:39,912 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:58:39,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:39,912 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:58:39,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:58:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:39,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:39,912 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:58:39,913 INFO L423 AbstractCegarLoop]: === Iteration 248 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:39,913 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:39,913 INFO L82 PathProgramCache]: Analyzing trace with hash -653703299, now seen corresponding path program 234 times [2018-09-26 21:58:39,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:39,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:39,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:39,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:39,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:39,976 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:39,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:39,985 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:39,994 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:58:39,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:39,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:40,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:40,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:40,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:40,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:40,040 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:40,040 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:58:40,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:40,509 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:58:40,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:40,510 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:40,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:40,510 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:58:40,510 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:58:40,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:40,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:58:40,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-26 21:58:40,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:40,738 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:40,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:40,738 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:40,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:40,738 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:40,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:40,739 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:40,739 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:58:40,739 INFO L423 AbstractCegarLoop]: === Iteration 249 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:40,739 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:40,739 INFO L82 PathProgramCache]: Analyzing trace with hash -653701377, now seen corresponding path program 235 times [2018-09-26 21:58:40,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:40,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:40,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:40,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:40,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:40,810 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:40,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:40,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:40,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:40,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:40,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:40,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:40,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:40,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:40,888 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:40,888 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:41,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:41,373 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:58:41,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:41,373 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:41,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:41,374 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:58:41,374 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:58:41,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:41,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:58:41,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-26 21:58:41,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:58:41,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:58:41,595 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:58:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:41,595 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:58:41,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:41,596 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:58:41,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:41,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:41,596 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:58:41,596 INFO L423 AbstractCegarLoop]: === Iteration 250 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:41,596 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:41,596 INFO L82 PathProgramCache]: Analyzing trace with hash -651856257, now seen corresponding path program 236 times [2018-09-26 21:58:41,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:41,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:41,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:41,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:41,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:41,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:41,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:41,667 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:41,673 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:41,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:41,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:41,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:41,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:41,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:41,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:41,740 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:41,740 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:58:42,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:42,213 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:58:42,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:42,214 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:42,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:42,214 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:58:42,214 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:58:42,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:42,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:58:42,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-26 21:58:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:42,438 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:42,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:42,438 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:42,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:42,438 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:42,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:42,438 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:42,438 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:58:42,438 INFO L423 AbstractCegarLoop]: === Iteration 251 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:42,438 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:42,439 INFO L82 PathProgramCache]: Analyzing trace with hash -651854335, now seen corresponding path program 237 times [2018-09-26 21:58:42,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:42,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:42,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:42,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:42,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:42,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:42,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:42,496 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:42,504 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:58:42,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:42,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:42,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:42,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:42,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:42,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:42,558 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:42,558 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:43,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:43,017 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:58:43,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:43,017 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:43,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:43,018 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:58:43,018 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:58:43,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:43,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:58:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-26 21:58:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:58:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:58:43,240 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:58:43,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:43,241 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:58:43,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:58:43,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:43,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:43,241 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:58:43,241 INFO L423 AbstractCegarLoop]: === Iteration 252 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:43,241 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:43,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1121304063, now seen corresponding path program 238 times [2018-09-26 21:58:43,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:43,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:43,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:43,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:43,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:43,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:43,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:43,301 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:43,306 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:43,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:43,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:43,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:43,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:43,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:43,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:43,358 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:43,358 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:58:43,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:43,794 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:58:43,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:43,794 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:43,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:43,794 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:58:43,795 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:58:43,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:43,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:58:44,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2018-09-26 21:58:44,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:44,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:44,028 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:44,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:44,028 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:44,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:44,028 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:44,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:44,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:44,029 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:58:44,029 INFO L423 AbstractCegarLoop]: === Iteration 253 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:44,029 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:44,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1121305985, now seen corresponding path program 239 times [2018-09-26 21:58:44,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:44,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:44,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:44,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:44,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:44,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:44,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:44,089 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:44,096 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:58:44,097 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:44,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:44,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:44,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:44,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:44,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:44,166 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:44,166 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:44,595 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:58:44,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:44,595 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:44,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:44,596 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:58:44,596 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:58:44,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:44,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:58:44,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2018-09-26 21:58:44,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:58:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:58:44,823 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:58:44,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:44,824 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:58:44,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:44,824 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:58:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:44,824 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:44,824 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:58:44,824 INFO L423 AbstractCegarLoop]: === Iteration 254 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:44,824 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:44,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1123151105, now seen corresponding path program 240 times [2018-09-26 21:58:44,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:44,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:44,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:44,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:44,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:44,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:44,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:44,882 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:44,893 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:58:44,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:44,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:44,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:44,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:44,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:44,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:44,960 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:44,960 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:58:45,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:45,387 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:58:45,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:45,387 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:45,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:45,388 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:58:45,388 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:58:45,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:45,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:58:45,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2018-09-26 21:58:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:45,618 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:58:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:45,618 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:45,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:45,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:45,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:45,619 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-09-26 21:58:45,619 INFO L423 AbstractCegarLoop]: === Iteration 255 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:45,619 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:45,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1123153027, now seen corresponding path program 7 times [2018-09-26 21:58:45,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:45,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:45,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:45,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:45,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:46,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:46,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:46,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:46,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:46,269 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:46,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:46,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:58:46,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:46,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:46,291 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:46,291 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:58:46,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:46,660 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2018-09-26 21:58:46,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:46,661 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:58:46,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:46,661 INFO L225 Difference]: With dead ends: 36 [2018-09-26 21:58:46,661 INFO L226 Difference]: Without dead ends: 34 [2018-09-26 21:58:46,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:46,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-26 21:58:46,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2018-09-26 21:58:46,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:58:46,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:58:46,807 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-26 21:58:46,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:46,807 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:58:46,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:46,807 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:58:46,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:58:46,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:46,807 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1] [2018-09-26 21:58:46,808 INFO L423 AbstractCegarLoop]: === Iteration 256 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:46,808 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:46,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1610002744, now seen corresponding path program 8 times [2018-09-26 21:58:46,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:46,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:46,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:46,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:46,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:46,865 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:46,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:46,880 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:46,888 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:46,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:46,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:46,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:46,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:58:46,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:58:46,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:58:46,957 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:46,957 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 11 states. [2018-09-26 21:58:47,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:47,662 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:58:47,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:58:47,664 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:58:47,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:47,665 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:58:47,665 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:58:47,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:47,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:58:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-26 21:58:47,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:58:47,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:58:47,940 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:58:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:47,940 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:58:47,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:58:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:58:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:58:47,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:47,941 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-26 21:58:47,941 INFO L423 AbstractCegarLoop]: === Iteration 257 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:47,942 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:47,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1610004666, now seen corresponding path program 241 times [2018-09-26 21:58:47,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:47,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:47,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:47,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:47,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:48,005 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:48,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:48,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:48,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:48,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:48,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:58:48,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:58:48,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:58:48,088 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:48,088 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:58:48,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:48,816 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:58:48,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:58:48,817 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:58:48,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:48,817 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:58:48,817 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:58:48,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:48,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:58:49,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-26 21:58:49,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:49,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:49,084 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:58:49,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:49,084 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:49,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:58:49,084 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:49,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:58:49,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:49,084 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-26 21:58:49,085 INFO L423 AbstractCegarLoop]: === Iteration 258 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:49,085 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:49,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1611849786, now seen corresponding path program 242 times [2018-09-26 21:58:49,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:49,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:49,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:49,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:49,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:49,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:49,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:49,149 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:49,157 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:49,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:49,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:49,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:49,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:58:49,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:58:49,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:58:49,217 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:49,217 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:58:49,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:49,929 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:58:49,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:58:49,929 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:58:49,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:49,929 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:58:49,930 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:58:49,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:49,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:58:50,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-26 21:58:50,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:58:50,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:58:50,215 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:58:50,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:50,215 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:58:50,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:58:50,215 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:58:50,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:58:50,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:50,215 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:58:50,215 INFO L423 AbstractCegarLoop]: === Iteration 259 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:50,215 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:50,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1611851708, now seen corresponding path program 243 times [2018-09-26 21:58:50,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:50,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:50,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:50,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:50,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:50,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:50,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:50,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:50,289 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:58:50,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:50,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:50,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:50,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:58:50,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:58:50,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:58:50,358 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:50,358 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:58:51,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:51,032 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:58:51,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:58:51,032 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:58:51,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:51,032 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:58:51,032 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:58:51,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:51,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:58:51,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-26 21:58:51,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:58:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:58:51,289 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:58:51,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:51,289 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:58:51,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:58:51,289 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:58:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:58:51,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:51,290 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-26 21:58:51,290 INFO L423 AbstractCegarLoop]: === Iteration 260 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:51,290 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:51,290 INFO L82 PathProgramCache]: Analyzing trace with hash -909957190, now seen corresponding path program 244 times [2018-09-26 21:58:51,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:51,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:51,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:51,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:51,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:51,355 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:51,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:51,365 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:51,372 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:51,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:51,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:51,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:51,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:58:51,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:58:51,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:58:51,423 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:51,423 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:58:52,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:52,156 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:58:52,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:58:52,157 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:58:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:52,157 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:58:52,157 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:58:52,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:52,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:58:52,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-26 21:58:52,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:58:52,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:58:52,435 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:58:52,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:52,435 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:58:52,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:58:52,435 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:58:52,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:58:52,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:52,435 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:58:52,435 INFO L423 AbstractCegarLoop]: === Iteration 261 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:52,435 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:52,435 INFO L82 PathProgramCache]: Analyzing trace with hash -909955268, now seen corresponding path program 245 times [2018-09-26 21:58:52,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:52,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:52,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:52,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:52,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:52,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:52,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:52,496 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:52,507 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:58:52,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:52,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:52,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:52,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:58:52,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:58:52,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:58:52,566 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:52,566 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:58:53,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:53,297 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:58:53,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:58:53,298 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:58:53,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:53,298 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:58:53,298 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:58:53,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:53,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:58:53,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-26 21:58:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:53,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:53,566 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:58:53,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:53,566 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:53,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:58:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:53,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:58:53,567 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:53,567 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:58:53,567 INFO L423 AbstractCegarLoop]: === Iteration 262 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:53,567 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:53,567 INFO L82 PathProgramCache]: Analyzing trace with hash -908110148, now seen corresponding path program 246 times [2018-09-26 21:58:53,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:53,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:53,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:53,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:53,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:53,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:53,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:53,632 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:53,641 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:58:53,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:53,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:53,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:53,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:58:53,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:58:53,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:58:53,698 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:53,699 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:58:54,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:54,428 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:58:54,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:58:54,428 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:58:54,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:54,428 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:58:54,428 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:58:54,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:54,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:58:54,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-26 21:58:54,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:58:54,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:58:54,713 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:58:54,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:54,713 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:58:54,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:58:54,713 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:58:54,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:58:54,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:54,713 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:58:54,713 INFO L423 AbstractCegarLoop]: === Iteration 263 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:54,713 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:54,714 INFO L82 PathProgramCache]: Analyzing trace with hash -908108226, now seen corresponding path program 247 times [2018-09-26 21:58:54,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:54,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:54,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:54,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:54,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:54,769 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:54,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:54,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:54,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:54,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:54,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:54,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:58:54,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:58:54,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:58:54,849 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:54,849 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:58:55,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:55,528 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:58:55,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:58:55,528 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:58:55,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:55,529 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:58:55,529 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:58:55,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:55,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:58:55,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-26 21:58:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:58:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:58:55,762 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-26 21:58:55,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:55,762 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:58:55,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:58:55,762 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:58:55,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:58:55,763 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:55,763 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-26 21:58:55,763 INFO L423 AbstractCegarLoop]: === Iteration 264 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:55,763 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:55,763 INFO L82 PathProgramCache]: Analyzing trace with hash -2004906182, now seen corresponding path program 248 times [2018-09-26 21:58:55,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:55,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:55,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:55,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:55,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:55,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:55,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:55,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:55,835 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:55,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:55,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:55,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:55,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:58:55,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:58:55,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:58:55,905 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:55,905 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-26 21:58:56,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:56,577 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:58:56,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:58:56,578 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:58:56,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:56,578 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:58:56,578 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:58:56,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:56,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:58:56,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-26 21:58:56,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:58:56,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:58:56,861 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:58:56,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:56,861 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:58:56,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:58:56,862 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:58:56,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:58:56,862 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:56,862 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:58:56,862 INFO L423 AbstractCegarLoop]: === Iteration 265 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:56,862 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:56,862 INFO L82 PathProgramCache]: Analyzing trace with hash -2004904260, now seen corresponding path program 249 times [2018-09-26 21:58:56,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:56,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:56,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:56,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:56,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:56,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:56,919 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:56,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:56,937 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:58:56,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:56,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:57,038 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:57,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:58:57,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:58:57,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:58:57,038 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:57,038 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:58:57,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:57,709 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:58:57,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:58:57,710 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:58:57,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:57,710 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:58:57,710 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:58:57,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:57,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:58:57,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-26 21:58:57,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:57,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:58:57,984 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:58:57,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:57,984 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:58:57,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:58:57,984 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:58:57,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:58:57,985 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:57,985 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:58:57,985 INFO L423 AbstractCegarLoop]: === Iteration 266 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:57,985 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:57,985 INFO L82 PathProgramCache]: Analyzing trace with hash -2003059140, now seen corresponding path program 250 times [2018-09-26 21:58:57,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:57,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:57,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:57,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:57,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:58,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:58,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:58,046 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:58,053 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:58,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:58,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:58,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:58,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:58:58,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:58:58,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:58:58,134 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:58,134 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:58:58,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:58,833 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:58:58,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:58:58,833 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:58:58,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:58,834 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:58:58,834 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:58:58,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:58,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:58:59,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-26 21:58:59,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:58:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:58:59,116 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:58:59,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:59,117 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:58:59,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:58:59,117 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:58:59,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:58:59,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:59,117 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:58:59,117 INFO L423 AbstractCegarLoop]: === Iteration 267 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:59,117 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:59,118 INFO L82 PathProgramCache]: Analyzing trace with hash -2003057218, now seen corresponding path program 251 times [2018-09-26 21:58:59,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:59,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:59,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:59,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:59,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:59,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:59,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:58:59,212 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:59,220 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:58:59,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:59,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:59,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:59,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:58:59,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:58:59,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:58:59,275 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:59,275 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:58:59,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:59,961 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:58:59,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:58:59,961 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:58:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:59,961 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:58:59,962 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:58:59,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:59,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:59:00,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-26 21:59:00,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:59:00,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:59:00,224 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:59:00,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:00,224 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:59:00,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:00,224 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:59:00,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:00,224 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:00,224 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:59:00,224 INFO L423 AbstractCegarLoop]: === Iteration 268 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:00,224 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:00,224 INFO L82 PathProgramCache]: Analyzing trace with hash -229898820, now seen corresponding path program 252 times [2018-09-26 21:59:00,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:00,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:00,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:00,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:00,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:00,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:00,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:00,287 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:59:00,301 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:59:00,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:00,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:00,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:00,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:00,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:00,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:00,371 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:00,371 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:59:01,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:01,018 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:59:01,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:01,018 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:01,019 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:59:01,019 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:59:01,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:01,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:59:01,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-26 21:59:01,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:01,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:01,327 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:01,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:01,327 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:01,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:01,327 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:01,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:01,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:01,327 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:01,327 INFO L423 AbstractCegarLoop]: === Iteration 269 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:01,328 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:01,328 INFO L82 PathProgramCache]: Analyzing trace with hash -229896898, now seen corresponding path program 253 times [2018-09-26 21:59:01,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:01,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:01,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:01,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:01,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:01,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:01,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:01,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:01,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:01,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:01,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:01,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:01,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:01,481 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:01,481 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:02,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:02,136 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:59:02,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:02,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:02,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:02,136 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:59:02,137 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:59:02,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:02,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:59:02,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:59:02,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:59:02,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:59:02,409 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:59:02,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:02,409 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:59:02,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:02,410 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:59:02,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:02,410 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:02,410 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:02,410 INFO L423 AbstractCegarLoop]: === Iteration 270 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:02,410 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:02,410 INFO L82 PathProgramCache]: Analyzing trace with hash -228051778, now seen corresponding path program 254 times [2018-09-26 21:59:02,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:02,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:02,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:02,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:02,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:02,474 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:02,474 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:02,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:59:02,490 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:59:02,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:02,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:02,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:02,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:02,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:02,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:02,555 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:02,555 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:59:03,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:03,205 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:59:03,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:03,205 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:03,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:03,206 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:59:03,206 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:59:03,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:03,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:59:03,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-26 21:59:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:03,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:03,507 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:03,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:03,507 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:03,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:03,507 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:03,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:03,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:03,508 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:59:03,508 INFO L423 AbstractCegarLoop]: === Iteration 271 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:03,508 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:03,508 INFO L82 PathProgramCache]: Analyzing trace with hash -228049856, now seen corresponding path program 255 times [2018-09-26 21:59:03,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:03,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:03,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:03,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:03,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:03,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:03,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:03,572 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:59:03,581 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:59:03,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:03,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:03,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:03,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:03,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:03,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:03,642 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:03,642 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:04,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:04,253 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:59:04,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:04,253 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:04,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:04,254 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:59:04,254 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:59:04,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:04,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:59:04,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-26 21:59:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:59:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:59:04,544 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-26 21:59:04,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:04,544 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:59:04,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:04,545 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:59:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:04,545 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:04,545 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-26 21:59:04,545 INFO L423 AbstractCegarLoop]: === Iteration 272 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:04,545 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:04,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1983899974, now seen corresponding path program 256 times [2018-09-26 21:59:04,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:04,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:04,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:04,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:04,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:04,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:04,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:04,607 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:59:04,612 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:59:04,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:04,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:04,667 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:04,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:04,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:04,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:04,667 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:04,667 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-26 21:59:05,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:05,422 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:59:05,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:05,422 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:05,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:05,423 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:59:05,423 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:59:05,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:05,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:59:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-26 21:59:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:05,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:05,709 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:05,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:05,709 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:05,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:05,710 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:05,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:05,710 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:05,710 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:59:05,710 INFO L423 AbstractCegarLoop]: === Iteration 273 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:05,710 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:05,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1983898052, now seen corresponding path program 257 times [2018-09-26 21:59:05,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:05,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:05,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:05,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:05,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:05,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:05,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:05,772 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:59:05,782 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:59:05,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:05,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:05,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:05,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:05,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:05,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:05,844 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:05,844 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:06,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:06,625 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:59:06,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:06,625 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:06,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:06,626 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:59:06,626 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:59:06,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:06,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:59:06,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-26 21:59:06,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:59:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:59:06,904 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:59:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:06,904 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:59:06,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:59:06,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:06,905 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:06,905 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:59:06,905 INFO L423 AbstractCegarLoop]: === Iteration 274 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:06,905 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:06,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1982052932, now seen corresponding path program 258 times [2018-09-26 21:59:06,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:06,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:06,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:06,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:06,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:06,965 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:06,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:06,974 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:59:06,986 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:59:06,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:06,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:07,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:07,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:07,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:07,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:07,050 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:07,050 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:59:07,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:07,803 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:59:07,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:07,804 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:07,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:07,804 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:59:07,804 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:59:07,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:59:08,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-26 21:59:08,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:08,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:08,094 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:08,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:08,094 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:08,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:08,095 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:08,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:08,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:08,095 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:08,095 INFO L423 AbstractCegarLoop]: === Iteration 275 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:08,095 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:08,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1982051010, now seen corresponding path program 259 times [2018-09-26 21:59:08,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:08,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:08,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:08,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:08,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:08,147 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:08,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:08,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:08,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:08,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:08,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:08,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:08,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:08,231 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:08,231 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:08,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:08,965 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:59:08,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:08,966 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:08,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:08,966 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:59:08,966 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:59:08,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:08,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:59:09,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-26 21:59:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:59:09,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:59:09,253 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:59:09,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:09,253 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:59:09,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:09,253 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:59:09,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:09,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:09,253 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:59:09,254 INFO L423 AbstractCegarLoop]: === Iteration 276 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:09,254 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:09,254 INFO L82 PathProgramCache]: Analyzing trace with hash -208892612, now seen corresponding path program 260 times [2018-09-26 21:59:09,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:09,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:09,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:09,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:09,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:09,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:09,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:09,317 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:59:09,323 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:59:09,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:09,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:09,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:09,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:09,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:09,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:09,392 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:09,392 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:59:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:10,147 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:59:10,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:10,147 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:10,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:10,148 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:59:10,148 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:59:10,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:10,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:59:10,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-26 21:59:10,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:10,437 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:10,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:10,437 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:10,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:10,438 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:10,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:10,438 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:10,438 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:10,438 INFO L423 AbstractCegarLoop]: === Iteration 277 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:10,438 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:10,438 INFO L82 PathProgramCache]: Analyzing trace with hash -208890690, now seen corresponding path program 261 times [2018-09-26 21:59:10,438 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:10,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:10,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:10,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:10,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:10,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:10,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:10,498 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:59:10,508 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:59:10,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:10,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:10,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:10,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:10,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:10,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:10,564 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:10,565 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:11,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:11,363 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:59:11,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:11,363 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:11,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:11,364 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:59:11,364 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:59:11,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:11,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:59:11,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-26 21:59:11,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:59:11,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:59:11,644 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:59:11,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:11,644 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:59:11,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:11,644 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:59:11,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:11,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:11,645 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:11,645 INFO L423 AbstractCegarLoop]: === Iteration 278 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:11,645 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:11,645 INFO L82 PathProgramCache]: Analyzing trace with hash -207045570, now seen corresponding path program 262 times [2018-09-26 21:59:11,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:11,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:11,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:11,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:11,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:11,707 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:11,707 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:11,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:11,713 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:59:11,720 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:59:11,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:11,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:11,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:11,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:11,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:11,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:11,771 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:11,771 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:59:12,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:12,564 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:59:12,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:12,564 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:12,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:12,564 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:59:12,565 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:59:12,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:12,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:59:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-26 21:59:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:12,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:12,874 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:12,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:12,875 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:12,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:12,875 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:12,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:12,875 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:12,875 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:59:12,875 INFO L423 AbstractCegarLoop]: === Iteration 279 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:12,875 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:12,875 INFO L82 PathProgramCache]: Analyzing trace with hash -207043648, now seen corresponding path program 263 times [2018-09-26 21:59:12,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:12,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:12,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:12,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:12,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:12,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:12,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:12,938 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:59:12,948 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:59:12,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:12,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:13,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:13,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:13,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:13,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:13,006 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:13,006 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:13,768 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:59:13,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:13,768 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:13,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:13,768 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:59:13,769 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:59:13,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:13,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:59:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-26 21:59:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:59:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:59:14,021 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-26 21:59:14,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:14,021 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:59:14,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:14,021 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:59:14,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:14,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:14,021 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:59:14,021 INFO L423 AbstractCegarLoop]: === Iteration 280 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:14,022 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:14,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1303841604, now seen corresponding path program 264 times [2018-09-26 21:59:14,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:14,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:14,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:14,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:14,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:14,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:14,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:14,086 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:59:14,095 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:59:14,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:14,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:14,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:14,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:14,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:14,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:14,150 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:14,151 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-26 21:59:14,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:14,877 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:59:14,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:14,877 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:14,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:14,878 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:59:14,878 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:59:14,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:14,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:59:15,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-26 21:59:15,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:15,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:15,187 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:15,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:15,187 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:15,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:15,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:15,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:15,187 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:15,188 INFO L423 AbstractCegarLoop]: === Iteration 281 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:15,188 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:15,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1303839682, now seen corresponding path program 265 times [2018-09-26 21:59:15,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:15,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:15,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:15,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:15,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:15,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:15,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:15,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:15,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:15,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:15,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:15,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:15,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:15,539 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:15,539 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:16,260 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:59:16,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:16,261 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:16,261 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:59:16,262 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:59:16,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:16,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:59:16,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-26 21:59:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:59:16,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:59:16,570 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:59:16,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:16,570 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:59:16,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:16,570 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:59:16,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:16,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:16,571 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:16,571 INFO L423 AbstractCegarLoop]: === Iteration 282 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:16,571 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:16,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1301994562, now seen corresponding path program 266 times [2018-09-26 21:59:16,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:16,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:16,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:16,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:16,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:16,649 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:16,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:16,655 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:59:16,660 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:59:16,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:16,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:16,725 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:16,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:16,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:16,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:16,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:16,745 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:16,745 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:59:17,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:17,536 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:59:17,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:17,536 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:17,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:17,537 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:59:17,537 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:59:17,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:17,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:59:17,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-26 21:59:17,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:17,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:17,830 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:17,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:17,830 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:17,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:17,830 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:17,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:17,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:17,831 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:59:17,831 INFO L423 AbstractCegarLoop]: === Iteration 283 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:17,831 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:17,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1301992640, now seen corresponding path program 267 times [2018-09-26 21:59:17,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:17,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:17,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:17,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:17,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:17,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:17,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:17,898 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:59:17,909 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:59:17,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:17,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:18,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:18,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:18,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:18,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:18,046 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:18,046 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:18,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:18,750 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:59:18,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:18,750 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:18,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:18,751 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:59:18,751 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:59:18,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:18,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:59:19,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-26 21:59:19,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:59:19,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:59:19,031 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:59:19,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:19,031 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:59:19,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:19,031 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:59:19,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:19,031 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:19,031 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:19,032 INFO L423 AbstractCegarLoop]: === Iteration 284 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:19,032 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:19,032 INFO L82 PathProgramCache]: Analyzing trace with hash 471165758, now seen corresponding path program 268 times [2018-09-26 21:59:19,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:19,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:19,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:19,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:19,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:19,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:19,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:19,095 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:59:19,101 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:59:19,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:19,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:19,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:19,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:19,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:19,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:19,158 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:19,158 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:59:19,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:19,845 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:59:19,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:19,846 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:19,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:19,846 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:59:19,846 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:59:19,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:19,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:59:20,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-26 21:59:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:20,148 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:20,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:20,148 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:20,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:20,148 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:20,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:20,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:20,148 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:59:20,148 INFO L423 AbstractCegarLoop]: === Iteration 285 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:20,148 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:20,149 INFO L82 PathProgramCache]: Analyzing trace with hash 471167680, now seen corresponding path program 269 times [2018-09-26 21:59:20,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:20,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:20,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:20,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:20,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:20,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:20,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:20,214 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:59:20,225 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:59:20,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:20,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:20,283 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:20,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:20,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:20,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:20,283 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:20,283 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:20,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:20,984 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:59:20,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:20,984 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:20,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:20,984 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:59:20,984 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:59:20,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:20,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:59:21,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:59:21,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:59:21,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:59:21,293 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:59:21,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:21,293 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:59:21,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:21,293 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:59:21,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:21,293 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:21,293 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:59:21,293 INFO L423 AbstractCegarLoop]: === Iteration 286 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:21,294 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:21,294 INFO L82 PathProgramCache]: Analyzing trace with hash 473012800, now seen corresponding path program 270 times [2018-09-26 21:59:21,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:21,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:21,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:21,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:21,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:21,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:21,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:21,355 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:59:21,363 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:59:21,363 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:21,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:21,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:21,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:21,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:21,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:21,422 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:21,422 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:59:22,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:22,087 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:59:22,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:22,087 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:22,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:22,087 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:59:22,087 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:59:22,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:22,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:59:22,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-26 21:59:22,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:22,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:22,383 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:22,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:22,383 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:22,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:22,383 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:22,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:22,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:22,384 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:22,384 INFO L423 AbstractCegarLoop]: === Iteration 287 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:22,384 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:22,384 INFO L82 PathProgramCache]: Analyzing trace with hash 473014722, now seen corresponding path program 271 times [2018-09-26 21:59:22,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:22,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:22,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:22,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:22,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:22,436 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:22,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:22,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:22,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:22,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:22,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:22,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:22,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:22,508 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:22,509 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:23,129 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:59:23,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:23,129 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:23,130 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:59:23,130 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:59:23,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:23,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:59:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-09-26 21:59:23,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:59:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:59:23,328 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-09-26 21:59:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:23,328 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:59:23,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:59:23,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:23,328 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:23,328 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-26 21:59:23,328 INFO L423 AbstractCegarLoop]: === Iteration 288 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:23,328 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:23,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1023196730, now seen corresponding path program 272 times [2018-09-26 21:59:23,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:23,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:23,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:23,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:23,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:23,382 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:23,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:23,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:23,391 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:59:23,397 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:59:23,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:23,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:23,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:23,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:23,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:23,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:23,453 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:23,453 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-09-26 21:59:24,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:24,176 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:59:24,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:24,176 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:24,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:24,177 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:59:24,177 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:59:24,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:24,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:59:24,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-26 21:59:24,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:24,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:24,513 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:24,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:24,513 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:24,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:24,513 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:24,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:24,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:24,513 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:59:24,514 INFO L423 AbstractCegarLoop]: === Iteration 289 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:24,514 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:24,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1023198652, now seen corresponding path program 273 times [2018-09-26 21:59:24,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:24,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:24,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:24,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:24,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:24,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:24,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:24,576 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:59:24,585 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:59:24,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:24,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:24,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:24,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:24,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:24,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:24,658 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:24,658 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:25,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:25,403 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:59:25,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:25,403 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:25,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:25,404 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:59:25,404 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:59:25,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:25,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:59:25,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:59:25,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:59:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:59:25,736 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:59:25,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:25,736 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:59:25,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:25,736 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:59:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:25,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:25,736 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:59:25,736 INFO L423 AbstractCegarLoop]: === Iteration 290 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:25,737 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:25,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1025043772, now seen corresponding path program 274 times [2018-09-26 21:59:25,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:25,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:25,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:25,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:25,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:25,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:25,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:25,798 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:59:25,803 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:59:25,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:25,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:25,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:25,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:25,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:25,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:25,948 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:25,948 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:59:26,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:26,702 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:59:26,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:26,703 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:26,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:26,703 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:59:26,703 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:59:26,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:26,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:59:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-26 21:59:27,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:27,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:27,027 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:27,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:27,027 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:27,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:27,027 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:27,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:27,028 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:27,028 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:27,028 INFO L423 AbstractCegarLoop]: === Iteration 291 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:27,028 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:27,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1025045694, now seen corresponding path program 275 times [2018-09-26 21:59:27,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:27,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:27,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:27,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:27,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:27,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:27,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:27,105 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:59:27,118 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:59:27,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:27,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:27,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:27,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:27,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:27,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:27,192 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:27,192 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:27,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:27,936 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:59:27,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:27,936 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:27,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:27,937 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:59:27,937 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:59:27,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:27,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:59:28,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-26 21:59:28,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:59:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:59:28,246 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:59:28,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:28,247 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:59:28,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:59:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:28,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:28,247 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:59:28,247 INFO L423 AbstractCegarLoop]: === Iteration 292 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:28,247 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:28,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1496763204, now seen corresponding path program 276 times [2018-09-26 21:59:28,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:28,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:28,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:28,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:28,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:28,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:28,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:28,312 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:59:28,322 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:59:28,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:28,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:28,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:28,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:28,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:28,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:28,392 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:28,392 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:59:29,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:29,098 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:59:29,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:29,098 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:29,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:29,099 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:59:29,099 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:59:29,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:29,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:59:29,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-26 21:59:29,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:29,429 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:29,430 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:29,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:29,430 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:29,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:29,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:29,430 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:29,430 INFO L423 AbstractCegarLoop]: === Iteration 293 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:29,430 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:29,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1496761282, now seen corresponding path program 277 times [2018-09-26 21:59:29,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:29,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:29,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:29,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:29,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:29,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:29,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:29,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:29,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:29,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:29,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:29,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:29,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:29,569 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:29,569 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:30,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:30,254 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:59:30,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:30,255 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:30,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:30,255 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:59:30,255 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:59:30,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:30,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:59:30,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-26 21:59:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:59:30,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:59:30,636 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:59:30,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:30,636 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:59:30,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:30,636 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:59:30,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:30,636 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:30,636 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:30,637 INFO L423 AbstractCegarLoop]: === Iteration 294 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:30,637 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:30,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1494916162, now seen corresponding path program 278 times [2018-09-26 21:59:30,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:30,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:30,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:30,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:30,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:30,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:30,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:30,701 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:59:30,706 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:59:30,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:30,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:30,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:30,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:30,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:30,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:30,778 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:30,778 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:59:31,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:31,450 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:59:31,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:31,450 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:31,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:31,451 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:59:31,451 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:59:31,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:31,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:59:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-26 21:59:31,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:31,778 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:31,778 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:31,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:31,778 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:31,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:31,778 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:59:31,778 INFO L423 AbstractCegarLoop]: === Iteration 295 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:31,778 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:31,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1494914240, now seen corresponding path program 279 times [2018-09-26 21:59:31,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:31,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:31,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:31,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:31,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:31,839 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:31,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:31,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:31,847 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:59:31,858 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:59:31,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:31,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:31,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:31,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:31,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:31,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:31,928 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:31,928 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:32,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:32,582 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:59:32,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:32,582 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:32,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:32,583 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:59:32,583 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:59:32,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:32,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:59:32,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-26 21:59:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:59:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:59:32,854 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-26 21:59:32,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:32,854 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:59:32,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:32,854 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:59:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:32,854 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:32,854 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:59:32,854 INFO L423 AbstractCegarLoop]: === Iteration 296 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:32,855 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:32,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1703255100, now seen corresponding path program 280 times [2018-09-26 21:59:32,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:32,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:32,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:32,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:32,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:32,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:32,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:32,915 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:59:32,920 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:59:32,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:32,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:32,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:32,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:32,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:32,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:32,978 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:32,978 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-26 21:59:33,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:33,731 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:59:33,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:33,731 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:33,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:33,731 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:59:33,732 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:59:33,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:33,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:59:34,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-26 21:59:34,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:34,071 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:34,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:34,071 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:34,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:34,071 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:34,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:34,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:34,072 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:34,072 INFO L423 AbstractCegarLoop]: === Iteration 297 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:34,072 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:34,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1703257022, now seen corresponding path program 281 times [2018-09-26 21:59:34,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:34,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:34,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:34,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:34,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:34,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:34,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:34,134 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:59:34,145 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:59:34,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:34,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:34,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:34,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:34,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:34,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:34,215 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:34,215 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:34,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:34,948 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:59:34,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:34,948 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:34,949 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:59:34,949 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:59:34,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:34,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:59:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:59:35,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:59:35,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:59:35,261 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:59:35,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:35,261 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:59:35,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:35,261 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:59:35,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:35,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:35,262 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:35,262 INFO L423 AbstractCegarLoop]: === Iteration 298 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:35,262 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:35,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1705102142, now seen corresponding path program 282 times [2018-09-26 21:59:35,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:35,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:35,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:35,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:35,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:35,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:35,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:35,330 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:59:35,340 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:59:35,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:35,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:35,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:35,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:35,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:35,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:35,597 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:35,598 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:59:36,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:36,924 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:59:36,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:36,924 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:36,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:36,925 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:59:36,925 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:59:36,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:36,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:59:37,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-26 21:59:37,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:37,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:37,256 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:37,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:37,256 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:37,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:37,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:37,257 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:37,257 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:59:37,257 INFO L423 AbstractCegarLoop]: === Iteration 299 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:37,257 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:37,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1705104064, now seen corresponding path program 283 times [2018-09-26 21:59:37,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:37,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:37,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:37,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:37,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:37,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:37,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:37,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:37,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:37,411 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:37,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:37,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:37,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:37,412 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:37,412 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:38,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:38,141 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:59:38,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:38,142 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:38,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:38,142 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:59:38,142 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:59:38,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:38,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:59:38,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-26 21:59:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:59:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:59:38,508 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:59:38,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:38,508 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:59:38,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:38,508 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:59:38,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:38,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:38,508 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:38,508 INFO L423 AbstractCegarLoop]: === Iteration 300 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:38,509 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:38,509 INFO L82 PathProgramCache]: Analyzing trace with hash -816704834, now seen corresponding path program 284 times [2018-09-26 21:59:38,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:38,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:38,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:38,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:38,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:38,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:38,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:38,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:59:38,579 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:59:38,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:38,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:38,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:38,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:38,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:38,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:38,648 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:38,648 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:59:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:39,339 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:59:39,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:39,339 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:39,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:39,339 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:59:39,339 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:59:39,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:39,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:59:39,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-26 21:59:39,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:39,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:39,674 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:39,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:39,674 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:39,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:39,674 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:39,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:39,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:39,675 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:59:39,675 INFO L423 AbstractCegarLoop]: === Iteration 301 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:39,675 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:39,675 INFO L82 PathProgramCache]: Analyzing trace with hash -816702912, now seen corresponding path program 285 times [2018-09-26 21:59:39,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:39,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:39,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:39,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:39,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:39,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:39,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:39,736 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:59:39,744 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:59:39,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:39,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:39,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:39,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:39,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:39,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:39,813 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:39,813 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:40,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:40,502 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:59:40,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:40,502 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:40,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:40,503 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:59:40,503 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:59:40,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:40,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:59:40,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-26 21:59:40,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:59:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:59:40,818 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:59:40,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:40,818 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:59:40,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:40,818 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:59:40,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:40,819 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:40,819 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:59:40,819 INFO L423 AbstractCegarLoop]: === Iteration 302 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:40,819 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:40,819 INFO L82 PathProgramCache]: Analyzing trace with hash -814857792, now seen corresponding path program 286 times [2018-09-26 21:59:40,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:40,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:40,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:40,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:40,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:40,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:40,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:40,880 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:59:40,886 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:59:40,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:40,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:40,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:40,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:40,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:40,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:40,946 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:40,946 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:59:41,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:41,618 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:59:41,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:41,618 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:41,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:41,618 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:59:41,618 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:59:41,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:41,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:59:41,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-26 21:59:41,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:41,943 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:41,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:41,944 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:41,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:41,944 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:41,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:41,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:41,944 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:41,944 INFO L423 AbstractCegarLoop]: === Iteration 303 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:41,944 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:41,944 INFO L82 PathProgramCache]: Analyzing trace with hash -814855870, now seen corresponding path program 287 times [2018-09-26 21:59:41,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:41,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:41,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:41,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:41,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:41,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:42,000 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:42,008 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:59:42,018 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:59:42,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:42,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:42,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:42,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:42,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:42,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:42,078 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:42,078 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:42,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:42,719 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:59:42,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:42,719 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:42,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:42,720 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:59:42,720 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:59:42,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:42,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:59:42,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-26 21:59:42,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:59:42,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:59:42,958 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-26 21:59:42,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:42,958 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:59:42,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:42,958 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:59:42,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:42,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:42,959 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:59:42,959 INFO L423 AbstractCegarLoop]: === Iteration 304 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:42,959 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:42,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1724261308, now seen corresponding path program 288 times [2018-09-26 21:59:42,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:42,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:42,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:42,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:42,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:43,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:43,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:43,021 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:59:43,031 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:59:43,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:43,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:43,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:43,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:43,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:43,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:43,089 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:43,089 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-26 21:59:43,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:43,729 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:59:43,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:43,730 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:43,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:43,730 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:59:43,730 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:59:43,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:43,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:59:44,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-26 21:59:44,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:44,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:44,054 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:44,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:44,055 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:44,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:44,055 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:44,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:44,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:44,055 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:44,055 INFO L423 AbstractCegarLoop]: === Iteration 305 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:44,055 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:44,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1724263230, now seen corresponding path program 289 times [2018-09-26 21:59:44,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:44,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:44,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:44,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:44,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:44,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:44,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:44,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:44,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:44,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:44,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:44,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:44,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:44,182 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:44,182 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:44,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:44,836 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:59:44,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:44,837 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:44,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:44,837 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:59:44,837 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:59:44,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:59:45,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-26 21:59:45,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:59:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:59:45,158 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:59:45,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:45,159 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:59:45,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:45,159 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:59:45,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:45,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:45,159 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:45,159 INFO L423 AbstractCegarLoop]: === Iteration 306 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:45,159 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:45,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1726108350, now seen corresponding path program 290 times [2018-09-26 21:59:45,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:45,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:45,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:45,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:45,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:45,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:45,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:45,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:59:45,269 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:59:45,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:45,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:45,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:45,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:45,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:45,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:45,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:45,320 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:59:45,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:45,932 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:59:45,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:45,932 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:45,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:45,933 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:59:45,933 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:59:45,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:45,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:59:46,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-26 21:59:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:46,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:46,263 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:46,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:46,264 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:46,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:46,264 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:46,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:46,264 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:46,264 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:59:46,264 INFO L423 AbstractCegarLoop]: === Iteration 307 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:46,264 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:46,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1726110272, now seen corresponding path program 291 times [2018-09-26 21:59:46,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:46,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:46,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:46,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:46,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:46,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:46,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:46,325 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:59:46,335 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:59:46,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:46,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:46,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:46,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:46,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:46,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:46,391 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:46,392 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:47,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:47,013 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:59:47,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:47,013 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:47,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:47,014 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:59:47,014 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:59:47,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:47,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:59:47,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-26 21:59:47,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:59:47,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:59:47,328 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:59:47,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:47,328 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:59:47,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:47,329 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:59:47,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:47,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:47,329 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:47,329 INFO L423 AbstractCegarLoop]: === Iteration 308 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:47,329 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:47,329 INFO L82 PathProgramCache]: Analyzing trace with hash -795698626, now seen corresponding path program 292 times [2018-09-26 21:59:47,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:47,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:47,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:47,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:47,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:47,392 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:47,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:47,401 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:59:47,408 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:59:47,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:47,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:47,487 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:47,487 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:47,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:47,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:47,488 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:47,488 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:59:48,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:48,166 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:59:48,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:48,167 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:48,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:48,167 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:59:48,167 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:59:48,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:48,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:59:48,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-26 21:59:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:48,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:48,501 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:48,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:48,501 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:48,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:48,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:48,502 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:48,502 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:59:48,502 INFO L423 AbstractCegarLoop]: === Iteration 309 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:48,502 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:48,502 INFO L82 PathProgramCache]: Analyzing trace with hash -795696704, now seen corresponding path program 293 times [2018-09-26 21:59:48,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:48,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:48,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:48,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:48,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:48,555 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:48,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:48,562 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:59:48,571 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:59:48,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:48,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:48,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:48,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:48,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:48,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:48,638 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:48,638 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:49,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:49,309 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:59:49,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:49,309 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:49,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:49,310 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:59:49,310 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:59:49,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:49,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:59:49,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-26 21:59:49,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:59:49,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:59:49,634 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:59:49,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:49,634 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:59:49,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:49,634 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:59:49,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:49,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:49,635 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:59:49,635 INFO L423 AbstractCegarLoop]: === Iteration 310 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:49,635 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:49,635 INFO L82 PathProgramCache]: Analyzing trace with hash -793851584, now seen corresponding path program 294 times [2018-09-26 21:59:49,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:49,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:49,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:49,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:49,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:49,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:49,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:49,701 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:59:49,715 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:59:49,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:49,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:49,811 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:49,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:49,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:49,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:49,812 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:49,812 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:59:50,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:50,460 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:59:50,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:50,460 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:50,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:50,461 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:59:50,461 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:59:50,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:50,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:59:50,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-26 21:59:50,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:50,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:50,789 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:50,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:50,789 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:50,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:50,790 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:50,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:50,790 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:50,790 INFO L423 AbstractCegarLoop]: === Iteration 311 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:50,790 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:50,790 INFO L82 PathProgramCache]: Analyzing trace with hash -793849662, now seen corresponding path program 295 times [2018-09-26 21:59:50,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:50,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:50,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:50,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:50,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:50,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:50,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:50,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:50,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:50,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:50,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:50,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:50,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:50,926 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:50,926 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:51,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:51,553 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:59:51,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:51,553 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:51,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:51,553 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:59:51,553 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:59:51,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:51,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:59:51,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-26 21:59:51,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:59:51,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:59:51,829 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-26 21:59:51,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:51,829 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:59:51,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:51,830 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:59:51,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:51,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:51,830 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:51,830 INFO L423 AbstractCegarLoop]: === Iteration 312 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:51,830 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:51,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1890647618, now seen corresponding path program 296 times [2018-09-26 21:59:51,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:51,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:51,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:51,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:51,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:51,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:51,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:51,897 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:59:51,904 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:59:51,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:51,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:51,952 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:51,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:51,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:51,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:51,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:51,973 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:51,973 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-26 21:59:52,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:52,565 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:59:52,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:52,565 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:52,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:52,566 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:59:52,566 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:59:52,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:52,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:59:52,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-26 21:59:52,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:52,898 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:52,898 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:52,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:52,898 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:52,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:52,898 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:52,898 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:59:52,898 INFO L423 AbstractCegarLoop]: === Iteration 313 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:52,899 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:52,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1890645696, now seen corresponding path program 297 times [2018-09-26 21:59:52,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:52,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:52,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:52,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:52,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:53,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:53,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:53,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:59:53,066 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:59:53,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:53,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:53,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:53,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:53,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:53,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:53,117 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:53,117 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:53,705 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:59:53,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:53,705 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:53,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:53,706 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:59:53,706 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:59:53,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:53,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:59:54,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-26 21:59:54,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:59:54,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:59:54,032 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:59:54,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:54,033 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:59:54,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:54,033 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:59:54,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:54,033 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:54,033 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:59:54,033 INFO L423 AbstractCegarLoop]: === Iteration 314 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:54,033 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:54,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1888800576, now seen corresponding path program 298 times [2018-09-26 21:59:54,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:54,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:54,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:54,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:54,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:54,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:54,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:54,100 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:59:54,107 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:59:54,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:54,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:54,182 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:54,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:54,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:54,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:54,183 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:54,183 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:59:54,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:54,856 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:59:54,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:54,856 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:54,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:54,856 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:59:54,857 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:59:54,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:54,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:59:55,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-26 21:59:55,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:55,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:55,193 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:55,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:55,193 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:55,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:55,193 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:55,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:55,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:55,193 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:55,194 INFO L423 AbstractCegarLoop]: === Iteration 315 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:55,194 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:55,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1888798654, now seen corresponding path program 299 times [2018-09-26 21:59:55,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:55,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:55,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:55,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:55,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:55,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:55,246 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:55,253 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:59:55,262 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:59:55,263 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:55,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:55,333 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:55,333 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:55,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:55,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:55,334 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:55,334 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:55,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:55,922 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:59:55,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:55,922 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:55,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:55,923 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:59:55,923 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:59:55,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:59:56,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-26 21:59:56,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:59:56,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:59:56,230 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:59:56,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:56,230 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:59:56,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:56,230 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:59:56,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:56,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:56,230 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:59:56,230 INFO L423 AbstractCegarLoop]: === Iteration 316 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:56,230 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:56,231 INFO L82 PathProgramCache]: Analyzing trace with hash -115640256, now seen corresponding path program 300 times [2018-09-26 21:59:56,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:56,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:56,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:56,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:56,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:56,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:56,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:56,292 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:59:56,302 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:59:56,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:56,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:56,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:56,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:56,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:56,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:56,377 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:56,377 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:59:56,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:56,933 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:59:56,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:56,933 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:56,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:56,934 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:59:56,934 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:59:56,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:56,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:59:57,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-09-26 21:59:57,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:57,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:57,266 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:57,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:57,266 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:57,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:57,266 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:57,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:57,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:57,267 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:57,267 INFO L423 AbstractCegarLoop]: === Iteration 317 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:57,267 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:57,267 INFO L82 PathProgramCache]: Analyzing trace with hash -115638334, now seen corresponding path program 301 times [2018-09-26 21:59:57,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:57,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:57,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:57,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:57,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:57,319 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:57,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:57,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:57,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:57,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:57,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:57,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:57,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:57,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:57,399 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:57,399 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:57,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:57,960 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:59:57,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:57,961 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:57,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:57,961 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:59:57,961 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:59:57,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:57,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:59:58,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-09-26 21:59:58,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:59:58,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:59:58,294 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:59:58,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:58,294 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:59:58,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:58,294 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:59:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:58,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:58,294 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:59:58,295 INFO L423 AbstractCegarLoop]: === Iteration 318 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:58,295 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:58,295 INFO L82 PathProgramCache]: Analyzing trace with hash -113793214, now seen corresponding path program 302 times [2018-09-26 21:59:58,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:58,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:58,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:58,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:58,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:58,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:58,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:58,355 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:59:58,361 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:59:58,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:58,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:58,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:58,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:58,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:58,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:58,427 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:58,427 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:59:58,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:58,993 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:59:58,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:58,993 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:58,993 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:59:58,993 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:59:58,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:58,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:59:59,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-09-26 21:59:59,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:59:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:59:59,328 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:59:59,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:59,328 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:59:59,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:59:59,328 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:59:59,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:59:59,328 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:59,328 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:59:59,329 INFO L423 AbstractCegarLoop]: === Iteration 319 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:59,329 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:59,329 INFO L82 PathProgramCache]: Analyzing trace with hash -113791292, now seen corresponding path program 303 times [2018-09-26 21:59:59,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:59,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:59,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:59,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:59,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:59,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:59,384 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:59:59,393 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:59:59,405 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:59:59,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:59,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:59,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:59,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:59:59,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:59:59,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:59:59,464 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:59,465 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:59:59,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:59,968 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2018-09-26 21:59:59,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:59:59,969 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:59:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:59,969 INFO L225 Difference]: With dead ends: 38 [2018-09-26 21:59:59,969 INFO L226 Difference]: Without dead ends: 36 [2018-09-26 21:59:59,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:59,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-26 22:00:00,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2018-09-26 22:00:00,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 22:00:00,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 22:00:00,184 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 19 [2018-09-26 22:00:00,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:00,184 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 22:00:00,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:00,184 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 22:00:00,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:00,184 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:00,184 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-26 22:00:00,185 INFO L423 AbstractCegarLoop]: === Iteration 320 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:00,185 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:00,185 INFO L82 PathProgramCache]: Analyzing trace with hash 330139066, now seen corresponding path program 304 times [2018-09-26 22:00:00,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:00,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:00,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:00,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:00,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:00,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:00,242 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:00,253 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 22:00:00,280 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 22:00:00,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:00,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:00,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:00,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:00,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:00,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:00,416 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:00,416 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 11 states. [2018-09-26 22:00:01,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:01,309 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 22:00:01,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:01,309 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:01,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:01,309 INFO L225 Difference]: With dead ends: 61 [2018-09-26 22:00:01,309 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 22:00:01,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:01,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 22:00:01,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-26 22:00:01,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 22:00:01,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 22:00:01,682 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 22:00:01,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:01,682 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 22:00:01,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:01,682 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 22:00:01,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:01,682 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:01,682 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 22:00:01,682 INFO L423 AbstractCegarLoop]: === Iteration 321 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:01,682 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:01,682 INFO L82 PathProgramCache]: Analyzing trace with hash 330140988, now seen corresponding path program 305 times [2018-09-26 22:00:01,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:01,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:01,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:01,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:01,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:01,738 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:01,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:01,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:01,746 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 22:00:01,755 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 22:00:01,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:01,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:01,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:01,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:01,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:01,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:01,821 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:01,821 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 22:00:02,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:02,722 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 22:00:02,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:02,722 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:02,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:02,723 INFO L225 Difference]: With dead ends: 61 [2018-09-26 22:00:02,723 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 22:00:02,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:02,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 22:00:03,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-26 22:00:03,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 22:00:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 22:00:03,088 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 22:00:03,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:03,088 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 22:00:03,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:03,088 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 22:00:03,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:03,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:03,088 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 22:00:03,088 INFO L423 AbstractCegarLoop]: === Iteration 322 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:03,088 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:03,089 INFO L82 PathProgramCache]: Analyzing trace with hash 331986108, now seen corresponding path program 306 times [2018-09-26 22:00:03,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:03,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:03,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:03,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:03,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:03,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:03,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:03,150 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 22:00:03,160 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 22:00:03,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:03,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:03,208 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:03,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:03,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:03,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:03,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:03,229 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:03,229 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 22:00:04,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:04,108 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 22:00:04,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:04,108 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:04,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:04,109 INFO L225 Difference]: With dead ends: 59 [2018-09-26 22:00:04,109 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 22:00:04,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:04,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 22:00:04,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-26 22:00:04,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 22:00:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 22:00:04,488 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 22:00:04,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:04,488 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 22:00:04,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:04,489 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 22:00:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:04,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:04,489 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 22:00:04,489 INFO L423 AbstractCegarLoop]: === Iteration 323 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:04,489 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:04,489 INFO L82 PathProgramCache]: Analyzing trace with hash 331988030, now seen corresponding path program 307 times [2018-09-26 22:00:04,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:04,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:04,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:04,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:04,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:04,542 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:04,542 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:04,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:00:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:04,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:04,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:04,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:04,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:04,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:04,613 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:04,613 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 22:00:05,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:05,475 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 22:00:05,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:05,475 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:05,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:05,475 INFO L225 Difference]: With dead ends: 57 [2018-09-26 22:00:05,475 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 22:00:05,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:05,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 22:00:05,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-26 22:00:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 22:00:05,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 22:00:05,822 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 22:00:05,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:05,822 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 22:00:05,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:05,822 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 22:00:05,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:05,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:05,822 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 22:00:05,822 INFO L423 AbstractCegarLoop]: === Iteration 324 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:05,822 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:05,822 INFO L82 PathProgramCache]: Analyzing trace with hash 2105146428, now seen corresponding path program 308 times [2018-09-26 22:00:05,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:05,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:05,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:05,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:00:05,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:05,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:05,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:05,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 22:00:05,887 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 22:00:05,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:05,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:05,944 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:05,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:05,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:05,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:05,944 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:05,944 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 22:00:06,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:06,853 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 22:00:06,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:06,853 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:06,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:06,854 INFO L225 Difference]: With dead ends: 61 [2018-09-26 22:00:06,854 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 22:00:06,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:06,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 22:00:07,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-26 22:00:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 22:00:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 22:00:07,311 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 22:00:07,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:07,311 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 22:00:07,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 22:00:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:07,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:07,312 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 22:00:07,312 INFO L423 AbstractCegarLoop]: === Iteration 325 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:07,312 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:07,312 INFO L82 PathProgramCache]: Analyzing trace with hash 2105148350, now seen corresponding path program 309 times [2018-09-26 22:00:07,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:07,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:07,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:07,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:07,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:07,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:07,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:07,375 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 22:00:07,385 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 22:00:07,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:07,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:07,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:07,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:07,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:07,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:07,454 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:07,455 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 22:00:08,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:08,357 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 22:00:08,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:08,357 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:08,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:08,358 INFO L225 Difference]: With dead ends: 61 [2018-09-26 22:00:08,358 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 22:00:08,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:08,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 22:00:08,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-26 22:00:08,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 22:00:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 22:00:08,722 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 22:00:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:08,722 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 22:00:08,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:08,723 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 22:00:08,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:08,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:08,723 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 22:00:08,723 INFO L423 AbstractCegarLoop]: === Iteration 326 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:08,723 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:08,723 INFO L82 PathProgramCache]: Analyzing trace with hash 2106993470, now seen corresponding path program 310 times [2018-09-26 22:00:08,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:08,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:08,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:08,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:08,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:08,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:08,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:08,787 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 22:00:08,793 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 22:00:08,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:08,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:08,849 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:08,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:08,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:08,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:08,850 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:08,850 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 22:00:09,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:09,731 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 22:00:09,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:09,731 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:09,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:09,732 INFO L225 Difference]: With dead ends: 59 [2018-09-26 22:00:09,732 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 22:00:09,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:09,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 22:00:10,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-26 22:00:10,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 22:00:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 22:00:10,110 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 22:00:10,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:10,110 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 22:00:10,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:10,110 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 22:00:10,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:10,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:10,110 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 22:00:10,110 INFO L423 AbstractCegarLoop]: === Iteration 327 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:10,111 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:10,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2106995392, now seen corresponding path program 311 times [2018-09-26 22:00:10,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:10,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:10,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:10,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:10,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:10,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:10,163 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:10,172 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 22:00:10,181 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 22:00:10,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:10,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:10,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:10,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:10,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:10,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:10,472 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:10,472 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 22:00:11,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:11,318 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 22:00:11,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:11,318 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:11,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:11,318 INFO L225 Difference]: With dead ends: 57 [2018-09-26 22:00:11,319 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 22:00:11,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:11,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 22:00:11,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-26 22:00:11,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 22:00:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 22:00:11,641 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-26 22:00:11,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:11,641 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 22:00:11,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:11,641 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 22:00:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:11,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:11,641 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 22:00:11,641 INFO L423 AbstractCegarLoop]: === Iteration 328 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:11,641 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:11,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1010197436, now seen corresponding path program 312 times [2018-09-26 22:00:11,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:11,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:11,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:11,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:11,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:11,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:11,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:11,701 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 22:00:11,710 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 22:00:11,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:11,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:11,758 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:11,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:11,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:11,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:11,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:11,779 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:11,779 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-26 22:00:12,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:12,609 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 22:00:12,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:12,609 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:12,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:12,610 INFO L225 Difference]: With dead ends: 57 [2018-09-26 22:00:12,610 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 22:00:12,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:12,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 22:00:12,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-26 22:00:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 22:00:12,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 22:00:12,996 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 22:00:12,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:12,996 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 22:00:12,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:12,996 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 22:00:12,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:12,996 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:12,996 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 22:00:12,996 INFO L423 AbstractCegarLoop]: === Iteration 329 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:12,997 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:12,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1010199358, now seen corresponding path program 313 times [2018-09-26 22:00:12,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:12,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:12,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:12,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:12,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:13,063 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:13,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:13,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:00:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:13,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:13,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:13,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:13,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:13,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:13,142 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:13,142 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 22:00:13,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:13,994 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 22:00:13,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:13,995 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:13,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:13,995 INFO L225 Difference]: With dead ends: 55 [2018-09-26 22:00:13,995 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 22:00:13,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:13,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 22:00:14,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-26 22:00:14,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 22:00:14,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 22:00:14,367 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 22:00:14,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:14,367 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 22:00:14,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:14,367 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 22:00:14,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:14,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:14,368 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 22:00:14,368 INFO L423 AbstractCegarLoop]: === Iteration 330 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:14,368 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:14,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1012044478, now seen corresponding path program 314 times [2018-09-26 22:00:14,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:14,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:14,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:14,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:00:14,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:14,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:14,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:14,431 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 22:00:14,440 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 22:00:14,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:14,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:14,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:14,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:14,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:14,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:14,509 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:14,509 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 22:00:15,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:15,363 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 22:00:15,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:15,363 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:15,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:15,364 INFO L225 Difference]: With dead ends: 57 [2018-09-26 22:00:15,364 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 22:00:15,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 22:00:15,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-26 22:00:15,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 22:00:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 22:00:15,741 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 22:00:15,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:15,741 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 22:00:15,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:15,741 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 22:00:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:15,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:15,741 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 22:00:15,741 INFO L423 AbstractCegarLoop]: === Iteration 331 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:15,741 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:15,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1012046400, now seen corresponding path program 315 times [2018-09-26 22:00:15,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:15,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:15,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:15,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:15,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:15,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:15,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:15,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 22:00:15,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 22:00:15,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:15,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:15,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:15,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:15,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:15,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:15,889 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:15,889 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 22:00:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:16,707 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 22:00:16,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:16,707 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:16,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:16,708 INFO L225 Difference]: With dead ends: 55 [2018-09-26 22:00:16,708 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 22:00:16,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:16,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 22:00:17,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-26 22:00:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 22:00:17,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 22:00:17,066 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 22:00:17,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:17,066 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 22:00:17,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:17,066 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 22:00:17,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:17,067 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:17,067 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 22:00:17,067 INFO L423 AbstractCegarLoop]: === Iteration 332 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:17,067 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:17,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1509762498, now seen corresponding path program 316 times [2018-09-26 22:00:17,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:17,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:17,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:17,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:17,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:17,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:17,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:17,145 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 22:00:17,152 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 22:00:17,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:17,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:17,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:17,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:17,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:17,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:17,221 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:17,221 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 22:00:18,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:18,027 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 22:00:18,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:18,027 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:18,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:18,028 INFO L225 Difference]: With dead ends: 53 [2018-09-26 22:00:18,028 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 22:00:18,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 22:00:18,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-26 22:00:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 22:00:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 22:00:18,403 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 22:00:18,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:18,403 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 22:00:18,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:18,403 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 22:00:18,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:18,403 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:18,403 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 22:00:18,404 INFO L423 AbstractCegarLoop]: === Iteration 333 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:18,404 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:18,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1509760576, now seen corresponding path program 317 times [2018-09-26 22:00:18,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:18,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:18,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:18,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:18,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:18,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:18,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:18,467 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 22:00:18,476 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 22:00:18,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:18,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:18,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:18,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:18,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:18,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:18,546 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:18,547 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 22:00:19,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:19,340 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 22:00:19,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:19,340 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:19,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:19,341 INFO L225 Difference]: With dead ends: 53 [2018-09-26 22:00:19,341 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 22:00:19,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 22:00:19,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 22:00:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 22:00:19,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 22:00:19,718 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 22:00:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:19,718 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 22:00:19,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 22:00:19,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:19,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:19,718 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 22:00:19,718 INFO L423 AbstractCegarLoop]: === Iteration 334 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:19,718 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:19,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1507915456, now seen corresponding path program 318 times [2018-09-26 22:00:19,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:19,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:19,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:19,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:19,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:19,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:19,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:19,779 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 22:00:19,789 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 22:00:19,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:19,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:19,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:19,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:19,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:19,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:19,841 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:19,841 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 22:00:20,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:20,604 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 22:00:20,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:20,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:20,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:20,605 INFO L225 Difference]: With dead ends: 51 [2018-09-26 22:00:20,605 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 22:00:20,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:20,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 22:00:20,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-26 22:00:20,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 22:00:20,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 22:00:20,992 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 22:00:20,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:20,992 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 22:00:20,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:20,992 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 22:00:20,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:20,993 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:20,993 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 22:00:20,993 INFO L423 AbstractCegarLoop]: === Iteration 335 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:20,993 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:20,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1507913534, now seen corresponding path program 319 times [2018-09-26 22:00:20,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:20,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:20,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:20,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:20,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:21,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:21,047 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:21,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:00:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:21,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:21,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:21,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:21,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:21,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:21,133 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:21,133 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 22:00:21,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:21,874 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 22:00:21,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:21,874 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:21,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:21,875 INFO L225 Difference]: With dead ends: 49 [2018-09-26 22:00:21,875 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 22:00:21,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:21,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 22:00:22,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-26 22:00:22,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 22:00:22,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 22:00:22,171 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-26 22:00:22,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:22,172 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 22:00:22,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:22,172 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 22:00:22,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:22,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:22,172 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 22:00:22,172 INFO L423 AbstractCegarLoop]: === Iteration 336 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:22,172 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:22,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1031203644, now seen corresponding path program 320 times [2018-09-26 22:00:22,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:22,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:22,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:22,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:00:22,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:22,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:22,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:22,238 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 22:00:22,252 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 22:00:22,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:22,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:22,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:22,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:22,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:22,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:22,323 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:22,323 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-26 22:00:23,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:23,252 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 22:00:23,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:23,253 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:23,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:23,253 INFO L225 Difference]: With dead ends: 61 [2018-09-26 22:00:23,254 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 22:00:23,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:23,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 22:00:23,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-26 22:00:23,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 22:00:23,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 22:00:23,653 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 22:00:23,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:23,653 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 22:00:23,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:23,654 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 22:00:23,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:23,654 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:23,654 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 22:00:23,654 INFO L423 AbstractCegarLoop]: === Iteration 337 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:23,654 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:23,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1031205566, now seen corresponding path program 321 times [2018-09-26 22:00:23,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:23,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:23,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:23,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:23,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:23,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:23,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:23,718 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 22:00:23,728 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 22:00:23,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:23,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:23,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:23,812 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:23,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:23,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:23,813 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:23,813 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 22:00:24,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:24,763 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 22:00:24,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:24,763 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:24,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:24,763 INFO L225 Difference]: With dead ends: 61 [2018-09-26 22:00:24,764 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 22:00:24,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:24,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 22:00:25,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-26 22:00:25,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 22:00:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 22:00:25,142 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 22:00:25,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:25,142 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 22:00:25,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:25,142 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 22:00:25,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:25,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:25,142 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 22:00:25,142 INFO L423 AbstractCegarLoop]: === Iteration 338 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:25,142 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:25,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1033050686, now seen corresponding path program 322 times [2018-09-26 22:00:25,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:25,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:25,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:25,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:25,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:25,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:25,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:25,205 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 22:00:25,211 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 22:00:25,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:25,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:25,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:25,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:25,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:25,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:25,278 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:25,279 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 22:00:26,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:26,175 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 22:00:26,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:26,175 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:26,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:26,175 INFO L225 Difference]: With dead ends: 59 [2018-09-26 22:00:26,175 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 22:00:26,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:26,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 22:00:26,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-26 22:00:26,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 22:00:26,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 22:00:26,568 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 22:00:26,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:26,568 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 22:00:26,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:26,568 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 22:00:26,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:26,568 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:26,568 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 22:00:26,568 INFO L423 AbstractCegarLoop]: === Iteration 339 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:26,569 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:26,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1033052608, now seen corresponding path program 323 times [2018-09-26 22:00:26,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:26,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:26,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:26,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:26,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:26,624 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:26,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:26,632 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 22:00:26,642 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 22:00:26,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:26,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:26,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:26,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:26,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:26,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:26,710 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:26,710 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 22:00:27,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:27,582 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 22:00:27,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:27,582 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:27,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:27,582 INFO L225 Difference]: With dead ends: 57 [2018-09-26 22:00:27,582 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 22:00:27,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:27,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 22:00:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-26 22:00:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 22:00:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 22:00:27,945 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 22:00:27,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:27,945 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 22:00:27,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:27,945 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 22:00:27,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:27,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:27,945 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 22:00:27,946 INFO L423 AbstractCegarLoop]: === Iteration 340 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:27,946 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:27,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1488756290, now seen corresponding path program 324 times [2018-09-26 22:00:27,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:27,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:27,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:27,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:27,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:28,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:28,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:28,010 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 22:00:28,020 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 22:00:28,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:28,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:28,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:28,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:28,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:28,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:28,087 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:28,087 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 22:00:29,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:29,008 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 22:00:29,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:29,008 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:29,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:29,009 INFO L225 Difference]: With dead ends: 61 [2018-09-26 22:00:29,009 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 22:00:29,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:29,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 22:00:29,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-26 22:00:29,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 22:00:29,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 22:00:29,406 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 22:00:29,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:29,406 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 22:00:29,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:29,406 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 22:00:29,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:29,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:29,406 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 22:00:29,406 INFO L423 AbstractCegarLoop]: === Iteration 341 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:29,407 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:29,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1488754368, now seen corresponding path program 325 times [2018-09-26 22:00:29,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:29,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:29,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:29,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:29,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:29,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:29,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:29,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:00:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:29,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:29,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:29,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:29,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:29,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:29,556 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:29,556 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 22:00:30,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:30,492 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 22:00:30,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:30,492 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:30,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:30,492 INFO L225 Difference]: With dead ends: 61 [2018-09-26 22:00:30,492 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 22:00:30,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:30,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 22:00:30,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-26 22:00:30,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 22:00:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 22:00:30,878 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 22:00:30,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:30,878 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 22:00:30,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:30,878 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 22:00:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:30,878 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:30,878 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 22:00:30,878 INFO L423 AbstractCegarLoop]: === Iteration 342 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:30,879 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:30,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1486909248, now seen corresponding path program 326 times [2018-09-26 22:00:30,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:30,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:30,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:30,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:00:30,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:30,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:30,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:30,940 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 22:00:30,946 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 22:00:30,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:30,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:31,002 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:31,002 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:31,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:31,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:31,002 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:31,002 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 22:00:31,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:31,938 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 22:00:31,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:31,938 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:31,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:31,938 INFO L225 Difference]: With dead ends: 59 [2018-09-26 22:00:31,938 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 22:00:31,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:31,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 22:00:32,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-26 22:00:32,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 22:00:32,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 22:00:32,338 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 22:00:32,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:32,338 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 22:00:32,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:32,338 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 22:00:32,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:32,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:32,338 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 22:00:32,339 INFO L423 AbstractCegarLoop]: === Iteration 343 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:32,339 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:32,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1486907326, now seen corresponding path program 327 times [2018-09-26 22:00:32,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:32,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:32,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:32,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:32,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:32,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:32,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:32,410 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 22:00:32,420 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 22:00:32,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:32,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:32,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:32,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:32,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:32,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:32,481 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:32,481 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 22:00:33,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:33,350 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 22:00:33,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 22:00:33,350 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 22:00:33,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:33,351 INFO L225 Difference]: With dead ends: 57 [2018-09-26 22:00:33,351 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 22:00:33,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:33,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 22:00:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-26 22:00:33,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 22:00:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 22:00:33,688 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-26 22:00:33,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:33,688 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 22:00:33,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 22:00:33,688 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 22:00:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 22:00:33,688 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:33,688 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 22:00:33,689 INFO L423 AbstractCegarLoop]: === Iteration 344 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:33,689 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:33,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1711262014, now seen corresponding path program 328 times [2018-09-26 22:00:33,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:33,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:33,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:33,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:33,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:33,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:33,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:33,758 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 22:00:33,764 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 22:00:33,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:33,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:33,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:33,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 22:00:33,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 22:00:33,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 22:00:33,814 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:33,814 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. Received shutdown request... [2018-09-26 22:00:34,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 22:00:34,220 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 22:00:34,225 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 22:00:34,225 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 10:00:34 BoogieIcfgContainer [2018-09-26 22:00:34,225 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 22:00:34,226 INFO L168 Benchmark]: Toolchain (without parser) took 256487.71 ms. Allocated memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: -388.5 MB). Free memory was 1.5 GB in the beginning and 962.3 MB in the end (delta: 514.9 MB). Peak memory consumption was 126.4 MB. Max. memory is 7.1 GB. [2018-09-26 22:00:34,227 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 22:00:34,227 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.57 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 22:00:34,228 INFO L168 Benchmark]: Boogie Preprocessor took 26.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 22:00:34,228 INFO L168 Benchmark]: RCFGBuilder took 271.29 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 22:00:34,228 INFO L168 Benchmark]: TraceAbstraction took 256141.62 ms. Allocated memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: -388.5 MB). Free memory was 1.5 GB in the beginning and 962.3 MB in the end (delta: 493.7 MB). Peak memory consumption was 105.3 MB. Max. memory is 7.1 GB. [2018-09-26 22:00:34,230 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 0.19 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 42.57 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.24 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 271.29 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 256141.62 ms. Allocated memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: -388.5 MB). Free memory was 1.5 GB in the beginning and 962.3 MB in the end (delta: 493.7 MB). Peak memory consumption was 105.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 29]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 29). Cancelled while BasicCegarLoop was constructing difference of abstraction (28states) and FLOYD_HOARE automaton (currently 8 states, 11 states before enhancement), while ReachableStatesComputation was computing reachable states (19 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 256.0s OverallTime, 344 OverallIterations, 8 TraceHistogramMax, 146.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1376 SDtfs, 2593 SDslu, 4604 SDs, 0 SdLazy, 7840 SolverSat, 4352 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8124 GetRequests, 5530 SyntacticMatches, 0 SemanticMatches, 2594 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=256, 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: 51.5s AutomataMinimizationTime, 343 MinimizatonAttempts, 5057 StatesRemovedByMinimization, 343 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 3.0s SatisfiabilityAnalysisTime, 43.0s InterpolantComputationTime, 11061 NumberOfCodeBlocks, 11061 NumberOfCodeBlocksAsserted, 1919 NumberOfCheckSat, 10374 ConstructedInterpolants, 0 QuantifiedInterpolants, 465528 SizeOfPredicates, 343 NumberOfNonLiveVariables, 14337 ConjunctsInSsa, 2936 ConjunctsInUnsatCore, 687 InterpolantComputations, 1 PerfectInterpolantSequences, 0/30836 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_22-00-34-238.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_22-00-34-238.csv Completed graceful shutdown