java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-10-01 00:06:52,463 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-01 00:06:52,465 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-01 00:06:52,479 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-01 00:06:52,479 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-01 00:06:52,480 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-01 00:06:52,482 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-01 00:06:52,483 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-01 00:06:52,485 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-01 00:06:52,486 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-01 00:06:52,487 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-01 00:06:52,487 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-01 00:06:52,488 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-01 00:06:52,489 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-01 00:06:52,490 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-01 00:06:52,491 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-01 00:06:52,492 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-01 00:06:52,495 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-01 00:06:52,497 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-01 00:06:52,504 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-01 00:06:52,505 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-01 00:06:52,506 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-01 00:06:52,509 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-01 00:06:52,517 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-01 00:06:52,542 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-01 00:06:52,544 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-01 00:06:52,545 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-01 00:06:52,545 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-01 00:06:52,548 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-01 00:06:52,549 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-01 00:06:52,549 INFO L133 SettingsManager]: * Use SBE=true [2018-10-01 00:06:52,549 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-01 00:06:52,549 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-01 00:06:52,549 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-01 00:06:52,550 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-01 00:06:52,550 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-01 00:06:52,550 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-01 00:06:52,550 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-01 00:06:52,552 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-01 00:06:52,552 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-01 00:06:52,552 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-01 00:06:52,552 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-01 00:06:52,552 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-01 00:06:52,552 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-01 00:06:52,553 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-01 00:06:52,553 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-01 00:06:52,553 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 00:06:52,553 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-01 00:06:52,555 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-01 00:06:52,555 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-01 00:06:52,555 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-01 00:06:52,555 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-01 00:06:52,555 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-01 00:06:52,556 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-01 00:06:52,600 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-01 00:06:52,613 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-01 00:06:52,617 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-01 00:06:52,621 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-01 00:06:52,621 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-01 00:06:52,622 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl [2018-10-01 00:06:52,623 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl' [2018-10-01 00:06:52,674 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-01 00:06:52,677 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-01 00:06:52,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-01 00:06:52,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-01 00:06:52,678 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-01 00:06:52,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:06:52" (1/1) ... [2018-10-01 00:06:52,714 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:06:52" (1/1) ... [2018-10-01 00:06:52,719 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-01 00:06:52,719 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-01 00:06:52,719 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-01 00:06:52,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-01 00:06:52,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-01 00:06:52,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-01 00:06:52,723 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-01 00:06:52,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:06:52" (1/1) ... [2018-10-01 00:06:52,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:06:52" (1/1) ... [2018-10-01 00:06:52,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:06:52" (1/1) ... [2018-10-01 00:06:52,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:06:52" (1/1) ... [2018-10-01 00:06:52,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:06:52" (1/1) ... [2018-10-01 00:06:52,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:06:52" (1/1) ... [2018-10-01 00:06:52,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:06:52" (1/1) ... [2018-10-01 00:06:52,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-01 00:06:52,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-01 00:06:52,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-01 00:06:52,748 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-01 00:06:52,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:06:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 00:06:52,821 INFO L124 BoogieDeclarations]: Specification and implementation of procedure mult given in one single declaration [2018-10-01 00:06:52,821 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2018-10-01 00:06:52,821 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2018-10-01 00:06:52,890 WARN L639 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-10-01 00:06:53,006 INFO L345 CfgBuilder]: Using library mode [2018-10-01 00:06:53,007 INFO L202 PluginConnector]: Adding new model Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:06:53 BoogieIcfgContainer [2018-10-01 00:06:53,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-01 00:06:53,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-01 00:06:53,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-01 00:06:53,012 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-01 00:06:53,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:06:52" (1/2) ... [2018-10-01 00:06:53,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7217ef20 and model type Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 12:06:53, skipping insertion in model container [2018-10-01 00:06:53,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:06:53" (2/2) ... [2018-10-01 00:06:53,015 INFO L112 eAbstractionObserver]: Analyzing ICFG Mult1-Safe.bpl [2018-10-01 00:06:53,025 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-01 00:06:53,033 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-01 00:06:53,084 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-01 00:06:53,085 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-01 00:06:53,085 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-01 00:06:53,086 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-01 00:06:53,086 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-01 00:06:53,086 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-01 00:06:53,086 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-01 00:06:53,086 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-01 00:06:53,087 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-01 00:06:53,102 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-01 00:06:53,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-01 00:06:53,109 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:53,110 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-01 00:06:53,111 INFO L423 AbstractCegarLoop]: === Iteration 1 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:06:53,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:53,118 INFO L82 PathProgramCache]: Analyzing trace with hash 924708, now seen corresponding path program 1 times [2018-10-01 00:06:53,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:53,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:53,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:53,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:53,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:53,205 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:06:53,205 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:06:53,206 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:06:53,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:53,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:53,424 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-01 00:06:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:53,545 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 00:06:53,545 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-01 00:06:53,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-01 00:06:53,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-01 00:06:53,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-01 00:06:53,566 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 5 states. [2018-10-01 00:06:53,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:53,714 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-01 00:06:53,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 00:06:53,716 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-10-01 00:06:53,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:53,728 INFO L225 Difference]: With dead ends: 10 [2018-10-01 00:06:53,728 INFO L226 Difference]: Without dead ends: 6 [2018-10-01 00:06:53,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-01 00:06:53,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-01 00:06:53,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-01 00:06:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-01 00:06:53,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-01 00:06:53,763 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-01 00:06:53,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:53,764 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-01 00:06:53,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-01 00:06:53,764 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-01 00:06:53,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-01 00:06:53,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:53,765 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-01 00:06:53,765 INFO L423 AbstractCegarLoop]: === Iteration 2 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:06:53,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:53,766 INFO L82 PathProgramCache]: Analyzing trace with hash 28663973, now seen corresponding path program 1 times [2018-10-01 00:06:53,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:53,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:53,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:53,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:53,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:53,773 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:06:53,773 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:06:53,773 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:06:53,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:53,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:53,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:06:53,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-10-01 00:06:53,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-01 00:06:53,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-01 00:06:53,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-01 00:06:53,889 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-01 00:06:54,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:54,064 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-01 00:06:54,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 00:06:54,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-01 00:06:54,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:54,066 INFO L225 Difference]: With dead ends: 9 [2018-10-01 00:06:54,066 INFO L226 Difference]: Without dead ends: 7 [2018-10-01 00:06:54,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-01 00:06:54,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-01 00:06:54,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-01 00:06:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-01 00:06:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-01 00:06:54,074 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-01 00:06:54,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:54,075 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-01 00:06:54,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-01 00:06:54,075 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-01 00:06:54,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-01 00:06:54,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:54,076 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-01 00:06:54,076 INFO L423 AbstractCegarLoop]: === Iteration 3 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:06:54,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:54,077 INFO L82 PathProgramCache]: Analyzing trace with hash 888581188, now seen corresponding path program 2 times [2018-10-01 00:06:54,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:54,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:54,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:54,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:54,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:54,086 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:06:54,087 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:06:54,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:06:54,105 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:06:54,119 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:06:54,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:54,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:54,398 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:06:54,398 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-01 00:06:54,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 00:06:54,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 00:06:54,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-01 00:06:54,399 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-01 00:06:54,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:54,471 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-01 00:06:54,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 00:06:54,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-01 00:06:54,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:54,473 INFO L225 Difference]: With dead ends: 10 [2018-10-01 00:06:54,473 INFO L226 Difference]: Without dead ends: 8 [2018-10-01 00:06:54,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-01 00:06:54,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-01 00:06:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-01 00:06:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-01 00:06:54,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-01 00:06:54,478 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-01 00:06:54,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:54,479 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-01 00:06:54,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 00:06:54,479 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-01 00:06:54,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-01 00:06:54,480 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:54,480 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2018-10-01 00:06:54,481 INFO L423 AbstractCegarLoop]: === Iteration 4 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:06:54,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:54,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1776211077, now seen corresponding path program 3 times [2018-10-01 00:06:54,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:54,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:54,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:54,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:54,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:54,496 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:06:54,496 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:06:54,496 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:06:54,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:06:54,521 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-01 00:06:54,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:54,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:54,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:06:54,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-10-01 00:06:54,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 00:06:54,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 00:06:54,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-01 00:06:54,745 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-01 00:06:54,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:54,835 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-01 00:06:54,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 00:06:54,836 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-01 00:06:54,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:54,837 INFO L225 Difference]: With dead ends: 11 [2018-10-01 00:06:54,837 INFO L226 Difference]: Without dead ends: 9 [2018-10-01 00:06:54,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-10-01 00:06:54,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-01 00:06:54,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-01 00:06:54,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-01 00:06:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-01 00:06:54,842 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-01 00:06:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:54,842 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-01 00:06:54,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 00:06:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-01 00:06:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-01 00:06:54,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:54,843 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2018-10-01 00:06:54,843 INFO L423 AbstractCegarLoop]: === Iteration 5 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:06:54,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:54,844 INFO L82 PathProgramCache]: Analyzing trace with hash -772033436, now seen corresponding path program 4 times [2018-10-01 00:06:54,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:54,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:54,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:54,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:54,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:54,855 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:06:54,855 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:06:54,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:06:54,865 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:06:54,876 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:06:54,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:54,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:55,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:06:55,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-01 00:06:55,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 00:06:55,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 00:06:55,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-01 00:06:55,349 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-01 00:06:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:55,486 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-01 00:06:55,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 00:06:55,486 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-01 00:06:55,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:55,487 INFO L225 Difference]: With dead ends: 12 [2018-10-01 00:06:55,487 INFO L226 Difference]: Without dead ends: 10 [2018-10-01 00:06:55,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-10-01 00:06:55,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-01 00:06:55,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-01 00:06:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-01 00:06:55,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-01 00:06:55,492 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-01 00:06:55,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:55,492 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-01 00:06:55,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 00:06:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-01 00:06:55,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-01 00:06:55,493 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:55,493 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1] [2018-10-01 00:06:55,493 INFO L423 AbstractCegarLoop]: === Iteration 6 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:06:55,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:55,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1836765285, now seen corresponding path program 5 times [2018-10-01 00:06:55,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:55,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:55,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:55,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:55,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:55,503 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:06:55,503 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:06:55,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:06:55,513 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:06:55,526 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-01 00:06:55,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:55,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:55,691 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:06:55,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-10-01 00:06:55,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 00:06:55,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 00:06:55,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-01 00:06:55,692 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-01 00:06:55,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:55,831 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-01 00:06:55,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 00:06:55,833 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-01 00:06:55,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:55,835 INFO L225 Difference]: With dead ends: 13 [2018-10-01 00:06:55,835 INFO L226 Difference]: Without dead ends: 11 [2018-10-01 00:06:55,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-10-01 00:06:55,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-01 00:06:55,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-01 00:06:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-01 00:06:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-01 00:06:55,840 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-01 00:06:55,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:55,840 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-01 00:06:55,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 00:06:55,841 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-01 00:06:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-01 00:06:55,841 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:55,841 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2018-10-01 00:06:55,841 INFO L423 AbstractCegarLoop]: === Iteration 7 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:06:55,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:55,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1105147012, now seen corresponding path program 6 times [2018-10-01 00:06:55,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:55,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:55,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:55,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:55,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:55,851 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:06:55,851 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:06:55,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:06:55,861 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:06:55,879 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-01 00:06:55,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:55,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:56,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:06:56,089 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-01 00:06:56,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 00:06:56,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 00:06:56,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-01 00:06:56,090 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-01 00:06:56,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:56,261 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-01 00:06:56,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 00:06:56,262 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-01 00:06:56,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:56,263 INFO L225 Difference]: With dead ends: 14 [2018-10-01 00:06:56,263 INFO L226 Difference]: Without dead ends: 12 [2018-10-01 00:06:56,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:06:56,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-01 00:06:56,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-01 00:06:56,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-01 00:06:56,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-01 00:06:56,268 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-01 00:06:56,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:56,268 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-01 00:06:56,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 00:06:56,268 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-01 00:06:56,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-01 00:06:56,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:56,269 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1] [2018-10-01 00:06:56,269 INFO L423 AbstractCegarLoop]: === Iteration 8 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:06:56,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:56,270 INFO L82 PathProgramCache]: Analyzing trace with hash -100182971, now seen corresponding path program 7 times [2018-10-01 00:06:56,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:56,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:56,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:56,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:56,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:56,280 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:06:56,280 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:06:56,280 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:06:56,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:56,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:56,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:06:56,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-10-01 00:06:56,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:06:56,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:06:56,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:06:56,559 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-01 00:06:56,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:56,692 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-01 00:06:56,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:06:56,693 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-01 00:06:56,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:56,694 INFO L225 Difference]: With dead ends: 15 [2018-10-01 00:06:56,694 INFO L226 Difference]: Without dead ends: 13 [2018-10-01 00:06:56,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-01 00:06:56,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-01 00:06:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-01 00:06:56,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-01 00:06:56,699 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-01 00:06:56,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:56,699 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-01 00:06:56,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:06:56,700 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-01 00:06:56,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-01 00:06:56,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:56,700 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2018-10-01 00:06:56,701 INFO L423 AbstractCegarLoop]: === Iteration 9 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:06:56,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:56,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1189293220, now seen corresponding path program 8 times [2018-10-01 00:06:56,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:56,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:56,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:56,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:56,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:56,712 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:06:56,713 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:06:56,713 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:06:56,721 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:06:56,742 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:06:56,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:56,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:56,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:06:56,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-01 00:06:56,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:56,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:56,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:56,923 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-01 00:06:57,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:57,066 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-01 00:06:57,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:57,067 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-01 00:06:57,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:57,068 INFO L225 Difference]: With dead ends: 16 [2018-10-01 00:06:57,068 INFO L226 Difference]: Without dead ends: 14 [2018-10-01 00:06:57,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-10-01 00:06:57,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-01 00:06:57,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-01 00:06:57,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-01 00:06:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-01 00:06:57,074 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-01 00:06:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:57,074 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-01 00:06:57,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:57,075 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-01 00:06:57,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-01 00:06:57,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:57,075 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1] [2018-10-01 00:06:57,075 INFO L423 AbstractCegarLoop]: === Iteration 10 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:06:57,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:57,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1786617819, now seen corresponding path program 9 times [2018-10-01 00:06:57,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:57,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:57,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:57,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:57,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:57,087 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:06:57,088 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:06:57,088 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:06:57,098 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:06:57,120 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-01 00:06:57,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:57,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:57,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:06:57,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-10-01 00:06:57,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-01 00:06:57,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-01 00:06:57,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-01 00:06:57,395 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-01 00:06:57,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:57,580 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-01 00:06:57,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-01 00:06:57,581 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-01 00:06:57,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:57,582 INFO L225 Difference]: With dead ends: 17 [2018-10-01 00:06:57,582 INFO L226 Difference]: Without dead ends: 15 [2018-10-01 00:06:57,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2018-10-01 00:06:57,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-01 00:06:57,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-01 00:06:57,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-01 00:06:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-01 00:06:57,588 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-01 00:06:57,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:57,589 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-01 00:06:57,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-01 00:06:57,589 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-01 00:06:57,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-01 00:06:57,590 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:57,590 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2018-10-01 00:06:57,590 INFO L423 AbstractCegarLoop]: === Iteration 11 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:06:57,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:57,590 INFO L82 PathProgramCache]: Analyzing trace with hash 449420484, now seen corresponding path program 10 times [2018-10-01 00:06:57,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:57,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:57,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:57,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:57,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:57,600 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:06:57,600 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:06:57,601 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:06:57,611 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:06:57,639 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:06:57,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:57,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:58,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:06:58,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-01 00:06:58,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-01 00:06:58,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-01 00:06:58,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-01 00:06:58,131 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-01 00:06:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:58,320 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-01 00:06:58,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-01 00:06:58,320 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-01 00:06:58,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:58,321 INFO L225 Difference]: With dead ends: 18 [2018-10-01 00:06:58,322 INFO L226 Difference]: Without dead ends: 16 [2018-10-01 00:06:58,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2018-10-01 00:06:58,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-01 00:06:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-01 00:06:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-01 00:06:58,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-01 00:06:58,328 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-01 00:06:58,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:58,328 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-01 00:06:58,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-01 00:06:58,328 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-01 00:06:58,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-01 00:06:58,329 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:58,329 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1] [2018-10-01 00:06:58,329 INFO L423 AbstractCegarLoop]: === Iteration 12 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:06:58,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:58,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1047131141, now seen corresponding path program 11 times [2018-10-01 00:06:58,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:58,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:58,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:58,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:58,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:58,341 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:06:58,341 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:06:58,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:06:58,357 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:06:58,404 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-01 00:06:58,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:58,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:58,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:06:58,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-10-01 00:06:58,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-01 00:06:58,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-01 00:06:58,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-01 00:06:58,889 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-01 00:06:59,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:59,114 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-01 00:06:59,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-01 00:06:59,115 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-01 00:06:59,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:59,116 INFO L225 Difference]: With dead ends: 19 [2018-10-01 00:06:59,116 INFO L226 Difference]: Without dead ends: 17 [2018-10-01 00:06:59,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2018-10-01 00:06:59,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-01 00:06:59,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-01 00:06:59,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-01 00:06:59,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-01 00:06:59,122 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-01 00:06:59,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:59,122 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-01 00:06:59,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-01 00:06:59,123 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-01 00:06:59,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-01 00:06:59,123 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:59,123 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1] [2018-10-01 00:06:59,123 INFO L423 AbstractCegarLoop]: === Iteration 13 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:06:59,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:59,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1898674972, now seen corresponding path program 12 times [2018-10-01 00:06:59,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:59,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:59,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:59,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:59,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:59,134 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:06:59,134 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:06:59,134 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:06:59,151 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:06:59,193 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 00:06:59,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:59,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:59,632 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:06:59,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-01 00:06:59,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-01 00:06:59,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-01 00:06:59,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-01 00:06:59,634 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-01 00:06:59,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:59,988 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-01 00:06:59,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-01 00:06:59,988 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-01 00:06:59,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:59,989 INFO L225 Difference]: With dead ends: 20 [2018-10-01 00:06:59,989 INFO L226 Difference]: Without dead ends: 18 [2018-10-01 00:06:59,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2018-10-01 00:06:59,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-01 00:06:59,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-01 00:06:59,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-01 00:06:59,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-01 00:06:59,995 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-01 00:06:59,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:59,996 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-01 00:06:59,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-01 00:06:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-01 00:06:59,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-01 00:06:59,996 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:59,997 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1] [2018-10-01 00:06:59,997 INFO L423 AbstractCegarLoop]: === Iteration 14 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:06:59,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:59,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1270616037, now seen corresponding path program 13 times [2018-10-01 00:06:59,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:59,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:59,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:59,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:59,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:00,008 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:00,008 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:00,008 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:00,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:00,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:00,385 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:00,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-01 00:07:00,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-01 00:07:00,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-01 00:07:00,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-01 00:07:00,386 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-01 00:07:00,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:00,913 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-01 00:07:00,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-01 00:07:00,913 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-01 00:07:00,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:00,914 INFO L225 Difference]: With dead ends: 21 [2018-10-01 00:07:00,914 INFO L226 Difference]: Without dead ends: 19 [2018-10-01 00:07:00,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2018-10-01 00:07:00,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-01 00:07:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-01 00:07:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-01 00:07:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-01 00:07:00,920 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-01 00:07:00,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:00,921 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-01 00:07:00,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-01 00:07:00,921 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-01 00:07:00,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-01 00:07:00,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:00,922 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1] [2018-10-01 00:07:00,922 INFO L423 AbstractCegarLoop]: === Iteration 15 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:00,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:00,922 INFO L82 PathProgramCache]: Analyzing trace with hash 734389508, now seen corresponding path program 14 times [2018-10-01 00:07:00,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:00,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:00,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:00,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:00,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:00,933 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:00,933 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:00,934 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:00,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:07:01,003 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:07:01,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:01,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:01,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:01,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-01 00:07:01,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-01 00:07:01,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-01 00:07:01,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-01 00:07:01,303 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-01 00:07:01,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:01,636 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-01 00:07:01,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-01 00:07:01,636 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-01 00:07:01,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:01,637 INFO L225 Difference]: With dead ends: 22 [2018-10-01 00:07:01,638 INFO L226 Difference]: Without dead ends: 20 [2018-10-01 00:07:01,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2018-10-01 00:07:01,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-01 00:07:01,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-01 00:07:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-01 00:07:01,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-01 00:07:01,644 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-01 00:07:01,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:01,644 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-01 00:07:01,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-01 00:07:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-01 00:07:01,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:07:01,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:01,645 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1] [2018-10-01 00:07:01,645 INFO L423 AbstractCegarLoop]: === Iteration 16 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:01,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:01,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1291236293, now seen corresponding path program 15 times [2018-10-01 00:07:01,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:01,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:01,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:01,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:01,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:01,655 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:01,656 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:01,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:01,677 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:07:01,780 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:07:01,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:01,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:03,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:03,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-10-01 00:07:03,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-01 00:07:03,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-01 00:07:03,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-01 00:07:03,417 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-01 00:07:03,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:03,920 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-01 00:07:03,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-01 00:07:03,921 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-01 00:07:03,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:03,922 INFO L225 Difference]: With dead ends: 23 [2018-10-01 00:07:03,922 INFO L226 Difference]: Without dead ends: 21 [2018-10-01 00:07:03,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2018-10-01 00:07:03,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-01 00:07:03,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-01 00:07:03,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-01 00:07:03,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-01 00:07:03,928 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-01 00:07:03,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:03,928 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-01 00:07:03,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-01 00:07:03,928 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-01 00:07:03,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-01 00:07:03,929 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:03,929 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1] [2018-10-01 00:07:03,929 INFO L423 AbstractCegarLoop]: === Iteration 17 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:03,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:03,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1373617444, now seen corresponding path program 16 times [2018-10-01 00:07:03,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:03,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:03,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:03,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:03,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:03,939 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:03,939 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:03,939 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:03,958 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:07:04,037 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:07:04,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:04,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:04,385 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:04,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-01 00:07:04,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-01 00:07:04,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-01 00:07:04,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-01 00:07:04,387 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-01 00:07:04,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:04,777 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-01 00:07:04,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-01 00:07:04,778 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-01 00:07:04,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:04,779 INFO L225 Difference]: With dead ends: 24 [2018-10-01 00:07:04,779 INFO L226 Difference]: Without dead ends: 22 [2018-10-01 00:07:04,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2018-10-01 00:07:04,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-01 00:07:04,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-01 00:07:04,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 00:07:04,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-01 00:07:04,785 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-01 00:07:04,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:04,786 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-01 00:07:04,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-01 00:07:04,786 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-01 00:07:04,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:04,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:04,787 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1] [2018-10-01 00:07:04,787 INFO L423 AbstractCegarLoop]: === Iteration 18 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:04,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:04,787 INFO L82 PathProgramCache]: Analyzing trace with hash -367534171, now seen corresponding path program 17 times [2018-10-01 00:07:04,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:04,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:04,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:04,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:04,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:04,797 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:04,797 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:04,797 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:04,808 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:07:04,907 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:07:04,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:04,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:05,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:05,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-01 00:07:05,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-01 00:07:05,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-01 00:07:05,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-01 00:07:05,341 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-01 00:07:05,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:05,811 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-01 00:07:05,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-01 00:07:05,811 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-01 00:07:05,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:05,813 INFO L225 Difference]: With dead ends: 25 [2018-10-01 00:07:05,813 INFO L226 Difference]: Without dead ends: 23 [2018-10-01 00:07:05,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2018-10-01 00:07:05,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-01 00:07:05,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-01 00:07:05,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-01 00:07:05,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-01 00:07:05,819 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-01 00:07:05,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:05,820 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-01 00:07:05,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-01 00:07:05,820 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-01 00:07:05,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-01 00:07:05,821 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:05,821 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1] [2018-10-01 00:07:05,821 INFO L423 AbstractCegarLoop]: === Iteration 19 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:05,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:05,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1491340612, now seen corresponding path program 18 times [2018-10-01 00:07:05,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:05,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:05,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:05,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:05,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:05,831 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:05,831 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:05,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:05,849 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:07:05,970 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:07:05,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:05,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:06,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:06,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-01 00:07:06,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-01 00:07:06,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-01 00:07:06,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-01 00:07:06,451 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-01 00:07:06,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:06,902 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-01 00:07:06,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-01 00:07:06,902 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-01 00:07:06,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:06,903 INFO L225 Difference]: With dead ends: 26 [2018-10-01 00:07:06,904 INFO L226 Difference]: Without dead ends: 24 [2018-10-01 00:07:06,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2018-10-01 00:07:06,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-01 00:07:06,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-01 00:07:06,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 00:07:06,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-01 00:07:06,909 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-01 00:07:06,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:06,909 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-01 00:07:06,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-01 00:07:06,909 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-01 00:07:06,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-01 00:07:06,910 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:06,910 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1] [2018-10-01 00:07:06,910 INFO L423 AbstractCegarLoop]: === Iteration 20 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:06,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:06,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1013083259, now seen corresponding path program 19 times [2018-10-01 00:07:06,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:06,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:06,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:06,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:06,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:06,919 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:06,920 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:06,920 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:06,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:07,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:07,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:07,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-01 00:07:07,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-01 00:07:07,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-01 00:07:07,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-01 00:07:07,513 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-01 00:07:08,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:08,145 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-01 00:07:08,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-01 00:07:08,146 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-01 00:07:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:08,146 INFO L225 Difference]: With dead ends: 27 [2018-10-01 00:07:08,146 INFO L226 Difference]: Without dead ends: 25 [2018-10-01 00:07:08,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2018-10-01 00:07:08,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-01 00:07:08,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-01 00:07:08,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-01 00:07:08,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-01 00:07:08,151 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-01 00:07:08,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:08,151 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-01 00:07:08,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-01 00:07:08,151 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-01 00:07:08,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-01 00:07:08,152 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:08,152 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1] [2018-10-01 00:07:08,152 INFO L423 AbstractCegarLoop]: === Iteration 21 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:08,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:08,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1340811932, now seen corresponding path program 20 times [2018-10-01 00:07:08,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:08,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:08,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:08,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:08,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:08,161 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:08,162 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:08,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:08,192 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:07:08,351 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:07:08,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:08,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:08,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:08,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-01 00:07:08,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-01 00:07:08,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-01 00:07:08,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-01 00:07:08,852 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-01 00:07:09,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:09,324 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-01 00:07:09,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-01 00:07:09,324 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-01 00:07:09,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:09,325 INFO L225 Difference]: With dead ends: 28 [2018-10-01 00:07:09,325 INFO L226 Difference]: Without dead ends: 26 [2018-10-01 00:07:09,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2018-10-01 00:07:09,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-01 00:07:09,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-01 00:07:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 00:07:09,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-01 00:07:09,331 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-01 00:07:09,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:09,332 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-01 00:07:09,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-01 00:07:09,332 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-01 00:07:09,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-01 00:07:09,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:09,333 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1] [2018-10-01 00:07:09,333 INFO L423 AbstractCegarLoop]: === Iteration 22 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:09,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:09,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1384501093, now seen corresponding path program 21 times [2018-10-01 00:07:09,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:09,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:09,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:09,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:09,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:09,343 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:09,343 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:09,344 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:09,361 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:07:09,545 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-01 00:07:09,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:09,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:10,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:10,325 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-01 00:07:10,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-01 00:07:10,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-01 00:07:10,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-01 00:07:10,326 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-01 00:07:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:11,074 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-01 00:07:11,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-01 00:07:11,078 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-01 00:07:11,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:11,078 INFO L225 Difference]: With dead ends: 29 [2018-10-01 00:07:11,078 INFO L226 Difference]: Without dead ends: 27 [2018-10-01 00:07:11,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2018-10-01 00:07:11,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-01 00:07:11,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-01 00:07:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-01 00:07:11,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-01 00:07:11,083 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-01 00:07:11,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:11,083 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-01 00:07:11,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-01 00:07:11,083 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-01 00:07:11,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-01 00:07:11,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:11,084 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2018-10-01 00:07:11,084 INFO L423 AbstractCegarLoop]: === Iteration 23 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:11,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:11,085 INFO L82 PathProgramCache]: Analyzing trace with hash -30141052, now seen corresponding path program 22 times [2018-10-01 00:07:11,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:11,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:11,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:11,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:11,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:11,092 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:11,092 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:11,093 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:11,114 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:07:11,308 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:07:11,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:11,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:11,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:11,832 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-01 00:07:11,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-01 00:07:11,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-01 00:07:11,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-01 00:07:11,833 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-01 00:07:12,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:12,552 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-01 00:07:12,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-01 00:07:12,552 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-01 00:07:12,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:12,553 INFO L225 Difference]: With dead ends: 30 [2018-10-01 00:07:12,553 INFO L226 Difference]: Without dead ends: 28 [2018-10-01 00:07:12,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2018-10-01 00:07:12,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-01 00:07:12,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-01 00:07:12,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 00:07:12,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-01 00:07:12,559 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-01 00:07:12,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:12,559 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-01 00:07:12,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-01 00:07:12,559 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-01 00:07:12,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-01 00:07:12,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:12,560 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1] [2018-10-01 00:07:12,560 INFO L423 AbstractCegarLoop]: === Iteration 24 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:12,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:12,561 INFO L82 PathProgramCache]: Analyzing trace with hash -934374587, now seen corresponding path program 23 times [2018-10-01 00:07:12,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:12,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:12,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:12,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:12,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:12,568 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:12,568 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:12,568 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:12,578 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:07:12,820 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-01 00:07:12,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:12,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:13,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:13,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-01 00:07:13,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-01 00:07:13,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-01 00:07:13,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-01 00:07:13,581 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-01 00:07:14,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:14,221 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-01 00:07:14,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-01 00:07:14,222 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-01 00:07:14,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:14,223 INFO L225 Difference]: With dead ends: 31 [2018-10-01 00:07:14,223 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 00:07:14,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2018-10-01 00:07:14,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 00:07:14,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-01 00:07:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-01 00:07:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-01 00:07:14,230 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-01 00:07:14,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:14,230 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-01 00:07:14,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-01 00:07:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-01 00:07:14,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-01 00:07:14,231 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:14,232 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1] [2018-10-01 00:07:14,232 INFO L423 AbstractCegarLoop]: === Iteration 25 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:14,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:14,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1099156900, now seen corresponding path program 24 times [2018-10-01 00:07:14,232 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:14,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:14,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:14,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:14,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:14,240 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:14,240 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:14,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:14,255 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:07:14,527 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-01 00:07:14,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:14,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:15,475 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:15,475 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-01 00:07:15,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-01 00:07:15,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-01 00:07:15,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-01 00:07:15,476 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-01 00:07:16,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:16,140 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-01 00:07:16,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-01 00:07:16,140 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-01 00:07:16,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:16,141 INFO L225 Difference]: With dead ends: 32 [2018-10-01 00:07:16,141 INFO L226 Difference]: Without dead ends: 30 [2018-10-01 00:07:16,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2018-10-01 00:07:16,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-01 00:07:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-01 00:07:16,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:07:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-01 00:07:16,147 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-01 00:07:16,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:16,147 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-01 00:07:16,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-01 00:07:16,147 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-01 00:07:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-01 00:07:16,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:16,148 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1] [2018-10-01 00:07:16,148 INFO L423 AbstractCegarLoop]: === Iteration 26 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:16,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:16,148 INFO L82 PathProgramCache]: Analyzing trace with hash -285876443, now seen corresponding path program 25 times [2018-10-01 00:07:16,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:16,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:16,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:16,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:16,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:16,155 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:16,155 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:16,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:16,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:16,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:17,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:17,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-01 00:07:17,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-01 00:07:17,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-01 00:07:17,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-01 00:07:17,047 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-01 00:07:17,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:17,688 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-01 00:07:17,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-01 00:07:17,689 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-01 00:07:17,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:17,689 INFO L225 Difference]: With dead ends: 33 [2018-10-01 00:07:17,690 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 00:07:17,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2018-10-01 00:07:17,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 00:07:17,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-01 00:07:17,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-01 00:07:17,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-01 00:07:17,695 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-01 00:07:17,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:17,695 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-01 00:07:17,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-01 00:07:17,695 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-01 00:07:17,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-01 00:07:17,696 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:17,696 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1] [2018-10-01 00:07:17,696 INFO L423 AbstractCegarLoop]: === Iteration 27 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:17,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:17,696 INFO L82 PathProgramCache]: Analyzing trace with hash -272237116, now seen corresponding path program 26 times [2018-10-01 00:07:17,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:17,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:17,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:17,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:17,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:17,703 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:17,703 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:17,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:17,717 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:07:18,111 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:07:18,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:18,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:19,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:19,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-01 00:07:19,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-01 00:07:19,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-01 00:07:19,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-01 00:07:19,981 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-01 00:07:20,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:20,669 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-01 00:07:20,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-01 00:07:20,670 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-01 00:07:20,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:20,670 INFO L225 Difference]: With dead ends: 34 [2018-10-01 00:07:20,670 INFO L226 Difference]: Without dead ends: 32 [2018-10-01 00:07:20,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2018-10-01 00:07:20,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-01 00:07:20,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-01 00:07:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:07:20,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-01 00:07:20,677 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-01 00:07:20,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:20,677 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-01 00:07:20,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-01 00:07:20,677 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-01 00:07:20,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-01 00:07:20,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:20,678 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1] [2018-10-01 00:07:20,678 INFO L423 AbstractCegarLoop]: === Iteration 28 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:20,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:20,678 INFO L82 PathProgramCache]: Analyzing trace with hash 150582021, now seen corresponding path program 27 times [2018-10-01 00:07:20,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:20,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:20,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:20,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:20,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:20,686 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:20,686 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:20,686 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:20,706 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:07:21,148 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-01 00:07:21,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:21,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:21,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:21,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-01 00:07:21,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-01 00:07:21,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-01 00:07:21,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-01 00:07:21,798 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-01 00:07:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:22,536 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-01 00:07:22,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-01 00:07:22,537 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-01 00:07:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:22,538 INFO L225 Difference]: With dead ends: 35 [2018-10-01 00:07:22,538 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 00:07:22,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2018-10-01 00:07:22,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 00:07:22,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-01 00:07:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-01 00:07:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-01 00:07:22,543 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-01 00:07:22,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:22,543 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-01 00:07:22,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-01 00:07:22,543 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-01 00:07:22,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-01 00:07:22,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:22,544 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1] [2018-10-01 00:07:22,544 INFO L423 AbstractCegarLoop]: === Iteration 29 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:22,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:22,545 INFO L82 PathProgramCache]: Analyzing trace with hash 373073380, now seen corresponding path program 28 times [2018-10-01 00:07:22,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:22,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:22,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:22,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:22,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:22,553 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:22,553 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:22,553 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:22,568 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:07:23,081 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:07:23,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:23,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:24,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:24,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-01 00:07:24,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-01 00:07:24,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-01 00:07:24,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-01 00:07:24,053 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-01 00:07:24,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:24,832 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-01 00:07:24,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-01 00:07:24,832 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-01 00:07:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:24,833 INFO L225 Difference]: With dead ends: 36 [2018-10-01 00:07:24,833 INFO L226 Difference]: Without dead ends: 34 [2018-10-01 00:07:24,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2018-10-01 00:07:24,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-01 00:07:24,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-01 00:07:24,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:07:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-01 00:07:24,838 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-01 00:07:24,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:24,838 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-01 00:07:24,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-01 00:07:24,839 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-01 00:07:24,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-01 00:07:24,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:24,839 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1] [2018-10-01 00:07:24,839 INFO L423 AbstractCegarLoop]: === Iteration 30 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:24,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:24,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1319629083, now seen corresponding path program 29 times [2018-10-01 00:07:24,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:24,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:24,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:24,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:24,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:24,846 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:24,847 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:24,847 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:24,860 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:07:25,362 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-01 00:07:25,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:25,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:26,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:26,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-01 00:07:26,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-01 00:07:26,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-01 00:07:26,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-01 00:07:26,136 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-01 00:07:26,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:26,970 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-01 00:07:26,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-01 00:07:26,971 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-01 00:07:26,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:26,972 INFO L225 Difference]: With dead ends: 37 [2018-10-01 00:07:26,972 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 00:07:26,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2018-10-01 00:07:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 00:07:26,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-01 00:07:26,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-01 00:07:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-01 00:07:26,977 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-01 00:07:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:26,978 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-01 00:07:26,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-01 00:07:26,978 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-01 00:07:26,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-01 00:07:26,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:26,978 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1] [2018-10-01 00:07:26,978 INFO L423 AbstractCegarLoop]: === Iteration 31 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:26,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:26,979 INFO L82 PathProgramCache]: Analyzing trace with hash 2041169412, now seen corresponding path program 30 times [2018-10-01 00:07:26,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:26,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:26,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:26,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:26,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:26,986 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:26,986 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:26,986 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:27,000 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:07:27,547 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-01 00:07:27,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:27,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:28,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:28,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-01 00:07:28,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-01 00:07:28,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-01 00:07:28,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-01 00:07:28,428 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-01 00:07:29,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:29,428 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-01 00:07:29,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-01 00:07:29,429 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-01 00:07:29,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:29,430 INFO L225 Difference]: With dead ends: 38 [2018-10-01 00:07:29,430 INFO L226 Difference]: Without dead ends: 36 [2018-10-01 00:07:29,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2018-10-01 00:07:29,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-01 00:07:29,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-01 00:07:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:07:29,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-01 00:07:29,435 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-01 00:07:29,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:29,435 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-01 00:07:29,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-01 00:07:29,435 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-01 00:07:29,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-01 00:07:29,436 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:29,436 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1] [2018-10-01 00:07:29,436 INFO L423 AbstractCegarLoop]: === Iteration 32 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:29,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:29,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1148259643, now seen corresponding path program 31 times [2018-10-01 00:07:29,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:29,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:29,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:29,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:29,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:29,445 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:29,446 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:29,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:29,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:30,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:30,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:30,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-01 00:07:30,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-01 00:07:30,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-01 00:07:30,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-01 00:07:30,940 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-01 00:07:31,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:31,882 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-01 00:07:31,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-01 00:07:31,882 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-01 00:07:31,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:31,883 INFO L225 Difference]: With dead ends: 39 [2018-10-01 00:07:31,883 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 00:07:31,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2018-10-01 00:07:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 00:07:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-01 00:07:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-01 00:07:31,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-01 00:07:31,889 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-01 00:07:31,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:31,889 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-01 00:07:31,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-01 00:07:31,889 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-01 00:07:31,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-01 00:07:31,889 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:31,889 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1] [2018-10-01 00:07:31,890 INFO L423 AbstractCegarLoop]: === Iteration 33 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:31,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:31,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1236312540, now seen corresponding path program 32 times [2018-10-01 00:07:31,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:31,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:31,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:31,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:31,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:31,896 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:31,896 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:31,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:31,910 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:07:32,591 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:07:32,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:32,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:33,477 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:33,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-01 00:07:33,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-01 00:07:33,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-01 00:07:33,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-01 00:07:33,479 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-01 00:07:34,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:34,550 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-01 00:07:34,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-01 00:07:34,550 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-01 00:07:34,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:34,551 INFO L225 Difference]: With dead ends: 40 [2018-10-01 00:07:34,551 INFO L226 Difference]: Without dead ends: 38 [2018-10-01 00:07:34,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2018-10-01 00:07:34,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-01 00:07:34,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-01 00:07:34,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:07:34,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-01 00:07:34,556 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-01 00:07:34,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:34,556 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-01 00:07:34,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-01 00:07:34,556 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-01 00:07:34,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-01 00:07:34,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:34,557 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1] [2018-10-01 00:07:34,557 INFO L423 AbstractCegarLoop]: === Iteration 34 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:34,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:34,557 INFO L82 PathProgramCache]: Analyzing trace with hash 329014949, now seen corresponding path program 33 times [2018-10-01 00:07:34,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:34,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:34,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:34,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:34,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:34,563 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:34,564 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:34,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:34,580 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:07:35,284 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-01 00:07:35,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:35,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:36,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:36,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-01 00:07:36,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-01 00:07:36,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-01 00:07:36,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-01 00:07:36,186 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-01 00:07:37,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:37,234 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-01 00:07:37,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-01 00:07:37,234 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-01 00:07:37,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:37,235 INFO L225 Difference]: With dead ends: 41 [2018-10-01 00:07:37,235 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 00:07:37,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2018-10-01 00:07:37,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 00:07:37,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-01 00:07:37,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-01 00:07:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-01 00:07:37,239 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-01 00:07:37,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:37,239 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-01 00:07:37,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-01 00:07:37,240 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-01 00:07:37,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-01 00:07:37,240 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:37,240 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1] [2018-10-01 00:07:37,240 INFO L423 AbstractCegarLoop]: === Iteration 35 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:37,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:37,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1609526852, now seen corresponding path program 34 times [2018-10-01 00:07:37,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:37,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:37,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:37,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:37,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:37,247 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:37,247 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:37,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:37,257 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:07:38,010 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:07:38,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:38,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:39,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:39,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-01 00:07:39,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-01 00:07:39,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-01 00:07:39,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-01 00:07:39,088 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-01 00:07:40,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:40,193 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-01 00:07:40,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-01 00:07:40,194 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-01 00:07:40,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:40,195 INFO L225 Difference]: With dead ends: 42 [2018-10-01 00:07:40,195 INFO L226 Difference]: Without dead ends: 40 [2018-10-01 00:07:40,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2018-10-01 00:07:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-01 00:07:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-01 00:07:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-01 00:07:40,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-01 00:07:40,201 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-01 00:07:40,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:40,202 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-01 00:07:40,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-01 00:07:40,202 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-01 00:07:40,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-01 00:07:40,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:40,202 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1] [2018-10-01 00:07:40,203 INFO L423 AbstractCegarLoop]: === Iteration 36 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:40,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:40,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1644277115, now seen corresponding path program 35 times [2018-10-01 00:07:40,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:40,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:40,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:40,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:40,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:40,210 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:40,210 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:40,210 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:40,222 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:07:41,177 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-01 00:07:41,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:41,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:42,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:42,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-01 00:07:42,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-01 00:07:42,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-01 00:07:42,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-01 00:07:42,332 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-01 00:07:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:43,495 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-01 00:07:43,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-01 00:07:43,495 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-01 00:07:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:43,496 INFO L225 Difference]: With dead ends: 43 [2018-10-01 00:07:43,496 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 00:07:43,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2018-10-01 00:07:43,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 00:07:43,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-01 00:07:43,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-01 00:07:43,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-01 00:07:43,501 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-01 00:07:43,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:43,501 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-01 00:07:43,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-01 00:07:43,501 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-01 00:07:43,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-01 00:07:43,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:43,501 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1] [2018-10-01 00:07:43,502 INFO L423 AbstractCegarLoop]: === Iteration 37 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:43,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:43,502 INFO L82 PathProgramCache]: Analyzing trace with hash 567015012, now seen corresponding path program 36 times [2018-10-01 00:07:43,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:43,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:43,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:43,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:43,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:43,509 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:43,509 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:43,509 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:43,525 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:07:44,549 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-01 00:07:44,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:44,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:45,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:45,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-01 00:07:45,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-01 00:07:45,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-01 00:07:45,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-01 00:07:45,564 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-01 00:07:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:46,823 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-01 00:07:46,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-01 00:07:46,823 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-01 00:07:46,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:46,824 INFO L225 Difference]: With dead ends: 44 [2018-10-01 00:07:46,824 INFO L226 Difference]: Without dead ends: 42 [2018-10-01 00:07:46,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2018-10-01 00:07:46,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-01 00:07:46,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-01 00:07:46,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-01 00:07:46,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-01 00:07:46,829 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-01 00:07:46,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:46,829 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-01 00:07:46,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-01 00:07:46,829 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-01 00:07:46,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-01 00:07:46,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:46,830 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1] [2018-10-01 00:07:46,830 INFO L423 AbstractCegarLoop]: === Iteration 38 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:46,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:46,830 INFO L82 PathProgramCache]: Analyzing trace with hash 397594213, now seen corresponding path program 37 times [2018-10-01 00:07:46,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:46,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:46,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:46,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:46,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:46,837 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:46,838 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:46,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:46,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:47,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:49,249 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:49,249 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-01 00:07:49,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-01 00:07:49,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-01 00:07:49,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-01 00:07:49,250 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-01 00:07:50,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:50,546 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-01 00:07:50,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-01 00:07:50,546 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-01 00:07:50,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:50,547 INFO L225 Difference]: With dead ends: 45 [2018-10-01 00:07:50,547 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 00:07:50,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2018-10-01 00:07:50,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 00:07:50,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-01 00:07:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-01 00:07:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-01 00:07:50,552 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-01 00:07:50,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:50,552 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-01 00:07:50,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-01 00:07:50,552 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-01 00:07:50,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-01 00:07:50,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:50,553 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1] [2018-10-01 00:07:50,553 INFO L423 AbstractCegarLoop]: === Iteration 39 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:50,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:50,553 INFO L82 PathProgramCache]: Analyzing trace with hash -559483260, now seen corresponding path program 38 times [2018-10-01 00:07:50,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:50,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:50,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:50,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:50,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:50,559 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:50,559 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:50,560 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:50,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:07:51,559 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:07:51,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:51,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:52,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:52,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-01 00:07:52,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-01 00:07:52,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-01 00:07:52,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-01 00:07:52,723 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-10-01 00:07:54,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:54,229 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-01 00:07:54,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-01 00:07:54,230 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-01 00:07:54,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:54,231 INFO L225 Difference]: With dead ends: 46 [2018-10-01 00:07:54,231 INFO L226 Difference]: Without dead ends: 44 [2018-10-01 00:07:54,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2018-10-01 00:07:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-01 00:07:54,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-01 00:07:54,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-01 00:07:54,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-01 00:07:54,236 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-01 00:07:54,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:54,236 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-01 00:07:54,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-01 00:07:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-01 00:07:54,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-01 00:07:54,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:54,237 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1] [2018-10-01 00:07:54,237 INFO L423 AbstractCegarLoop]: === Iteration 40 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:54,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:54,237 INFO L82 PathProgramCache]: Analyzing trace with hash -164113851, now seen corresponding path program 39 times [2018-10-01 00:07:54,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:54,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:54,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:54,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:54,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:54,244 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:54,244 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:54,244 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:54,268 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:07:55,474 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-01 00:07:55,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:55,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:56,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:07:56,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-01 00:07:56,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-01 00:07:56,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-01 00:07:56,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-01 00:07:56,640 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-10-01 00:07:58,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:58,065 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-01 00:07:58,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-01 00:07:58,065 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-10-01 00:07:58,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:58,066 INFO L225 Difference]: With dead ends: 47 [2018-10-01 00:07:58,066 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 00:07:58,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2018-10-01 00:07:58,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 00:07:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-01 00:07:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-01 00:07:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-01 00:07:58,071 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-01 00:07:58,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:58,071 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-01 00:07:58,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-01 00:07:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-01 00:07:58,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-01 00:07:58,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:58,072 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1] [2018-10-01 00:07:58,072 INFO L423 AbstractCegarLoop]: === Iteration 41 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:07:58,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:58,072 INFO L82 PathProgramCache]: Analyzing trace with hash -792564060, now seen corresponding path program 40 times [2018-10-01 00:07:58,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:58,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:58,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:58,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:58,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:58,079 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:07:58,079 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:07:58,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:07:58,093 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:07:59,677 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:07:59,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:59,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:00,949 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:08:00,949 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-01 00:08:00,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-01 00:08:00,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-01 00:08:00,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-01 00:08:00,950 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-10-01 00:08:02,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:02,431 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-01 00:08:02,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-01 00:08:02,432 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-10-01 00:08:02,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:02,433 INFO L225 Difference]: With dead ends: 48 [2018-10-01 00:08:02,433 INFO L226 Difference]: Without dead ends: 46 [2018-10-01 00:08:02,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2018-10-01 00:08:02,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-01 00:08:02,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-01 00:08:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-01 00:08:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-01 00:08:02,438 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-01 00:08:02,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:02,438 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-01 00:08:02,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-01 00:08:02,438 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-01 00:08:02,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-01 00:08:02,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:02,438 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1] [2018-10-01 00:08:02,439 INFO L423 AbstractCegarLoop]: === Iteration 42 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:08:02,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:02,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1200315941, now seen corresponding path program 41 times [2018-10-01 00:08:02,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:02,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:02,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:02,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:02,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:02,446 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:08:02,446 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:08:02,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:08:02,461 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:08:03,999 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-01 00:08:03,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:04,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:05,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:08:05,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-01 00:08:05,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-01 00:08:05,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-01 00:08:05,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-01 00:08:05,466 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-10-01 00:08:07,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:07,010 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-01 00:08:07,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-01 00:08:07,011 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-10-01 00:08:07,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:07,012 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:08:07,012 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:08:07,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2018-10-01 00:08:07,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:08:07,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-01 00:08:07,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-01 00:08:07,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-01 00:08:07,016 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-01 00:08:07,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:07,016 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-01 00:08:07,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-01 00:08:07,016 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-01 00:08:07,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-01 00:08:07,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:07,017 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1] [2018-10-01 00:08:07,017 INFO L423 AbstractCegarLoop]: === Iteration 43 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:08:07,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:07,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1444913468, now seen corresponding path program 42 times [2018-10-01 00:08:07,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:07,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:07,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:07,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:07,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:07,024 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:08:07,024 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:08:07,025 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:08:07,037 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:08:08,812 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-01 00:08:08,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:08,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:10,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:08:10,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-01 00:08:10,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-01 00:08:10,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-01 00:08:10,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-01 00:08:10,358 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-10-01 00:08:11,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:11,990 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-01 00:08:11,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-01 00:08:11,990 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-01 00:08:11,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:11,991 INFO L225 Difference]: With dead ends: 50 [2018-10-01 00:08:11,991 INFO L226 Difference]: Without dead ends: 48 [2018-10-01 00:08:11,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2018-10-01 00:08:11,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-01 00:08:11,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-01 00:08:11,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-01 00:08:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-01 00:08:11,998 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-01 00:08:11,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:11,999 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-01 00:08:11,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-01 00:08:11,999 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-01 00:08:11,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-01 00:08:11,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:11,999 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1] [2018-10-01 00:08:12,000 INFO L423 AbstractCegarLoop]: === Iteration 44 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:08:12,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:12,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1842646523, now seen corresponding path program 43 times [2018-10-01 00:08:12,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:12,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:12,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:12,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:12,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:12,006 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:08:12,006 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:08:12,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:08:12,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:13,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:15,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:08:15,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-01 00:08:15,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-01 00:08:15,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-01 00:08:15,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-01 00:08:15,333 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-10-01 00:08:17,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:17,043 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-01 00:08:17,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-01 00:08:17,044 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-10-01 00:08:17,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:17,045 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:08:17,045 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:08:17,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2018-10-01 00:08:17,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:08:17,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-01 00:08:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-01 00:08:17,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-01 00:08:17,050 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-01 00:08:17,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:17,050 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-01 00:08:17,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-01 00:08:17,051 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-01 00:08:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-01 00:08:17,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:17,051 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1] [2018-10-01 00:08:17,051 INFO L423 AbstractCegarLoop]: === Iteration 45 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:08:17,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:17,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1287469340, now seen corresponding path program 44 times [2018-10-01 00:08:17,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:17,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:17,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:17,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:17,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:17,058 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:08:17,059 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:08:17,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:08:17,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:08:18,760 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:08:18,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:18,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:20,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:08:20,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-01 00:08:20,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-01 00:08:20,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-01 00:08:20,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-01 00:08:20,330 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-10-01 00:08:22,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:22,093 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-01 00:08:22,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-01 00:08:22,093 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-10-01 00:08:22,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:22,094 INFO L225 Difference]: With dead ends: 52 [2018-10-01 00:08:22,094 INFO L226 Difference]: Without dead ends: 50 [2018-10-01 00:08:22,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2018-10-01 00:08:22,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-01 00:08:22,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-01 00:08:22,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-01 00:08:22,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-01 00:08:22,099 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-01 00:08:22,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:22,099 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-01 00:08:22,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-01 00:08:22,099 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-01 00:08:22,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-01 00:08:22,100 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:22,100 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1] [2018-10-01 00:08:22,100 INFO L423 AbstractCegarLoop]: === Iteration 46 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:08:22,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:22,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1256845851, now seen corresponding path program 45 times [2018-10-01 00:08:22,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:22,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:22,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:22,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:22,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:22,107 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:08:22,107 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:08:22,108 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:08:22,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:08:24,239 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-01 00:08:24,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:24,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:25,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:08:25,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-01 00:08:25,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-01 00:08:25,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-01 00:08:25,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-01 00:08:25,963 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-10-01 00:08:27,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:27,809 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-01 00:08:27,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-01 00:08:27,809 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-10-01 00:08:27,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:27,810 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:08:27,810 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:08:27,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2018-10-01 00:08:27,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:08:27,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-01 00:08:27,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-01 00:08:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-01 00:08:27,816 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-01 00:08:27,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:27,816 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-01 00:08:27,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-01 00:08:27,817 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-01 00:08:27,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-01 00:08:27,817 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:27,817 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2018-10-01 00:08:27,817 INFO L423 AbstractCegarLoop]: === Iteration 47 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:08:27,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:27,818 INFO L82 PathProgramCache]: Analyzing trace with hash -307517692, now seen corresponding path program 46 times [2018-10-01 00:08:27,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:27,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:27,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:27,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:27,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:27,824 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:08:27,825 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:08:27,825 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:08:27,857 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:08:30,453 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:08:30,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:30,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:31,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:08:31,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-01 00:08:31,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-01 00:08:31,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-01 00:08:31,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-01 00:08:31,991 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-10-01 00:08:33,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:33,907 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-01 00:08:33,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-01 00:08:33,908 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-01 00:08:33,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:33,909 INFO L225 Difference]: With dead ends: 54 [2018-10-01 00:08:33,909 INFO L226 Difference]: Without dead ends: 52 [2018-10-01 00:08:33,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2018-10-01 00:08:33,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-01 00:08:33,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-01 00:08:33,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-01 00:08:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-01 00:08:33,915 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-01 00:08:33,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:33,915 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-01 00:08:33,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-01 00:08:33,916 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-01 00:08:33,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-01 00:08:33,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:33,916 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1] [2018-10-01 00:08:33,916 INFO L423 AbstractCegarLoop]: === Iteration 48 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:08:33,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:33,916 INFO L82 PathProgramCache]: Analyzing trace with hash -943115835, now seen corresponding path program 47 times [2018-10-01 00:08:33,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:33,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:33,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:33,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:33,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:33,922 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:08:33,922 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:08:33,922 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:08:33,929 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:08:36,586 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-01 00:08:36,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:36,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:38,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:08:38,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-01 00:08:38,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-01 00:08:38,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-01 00:08:38,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-01 00:08:38,131 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-10-01 00:08:40,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:40,219 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-01 00:08:40,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-01 00:08:40,219 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-10-01 00:08:40,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:40,220 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:08:40,220 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:08:40,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2018-10-01 00:08:40,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:08:40,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-01 00:08:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-01 00:08:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-01 00:08:40,238 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-01 00:08:40,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:40,238 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-01 00:08:40,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-01 00:08:40,238 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-01 00:08:40,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-01 00:08:40,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:40,238 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1] [2018-10-01 00:08:40,239 INFO L423 AbstractCegarLoop]: === Iteration 49 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:08:40,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:40,239 INFO L82 PathProgramCache]: Analyzing trace with hash 828178212, now seen corresponding path program 48 times [2018-10-01 00:08:40,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:40,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:40,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:40,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:40,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:40,245 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:08:40,245 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:08:40,245 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:08:40,253 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:08:42,988 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-01 00:08:42,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:42,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:44,561 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:08:44,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-01 00:08:44,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-01 00:08:44,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-01 00:08:44,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-01 00:08:44,562 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-10-01 00:08:46,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:46,767 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-01 00:08:46,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-01 00:08:46,767 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-10-01 00:08:46,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:46,768 INFO L225 Difference]: With dead ends: 56 [2018-10-01 00:08:46,768 INFO L226 Difference]: Without dead ends: 54 [2018-10-01 00:08:46,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2018-10-01 00:08:46,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-01 00:08:46,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-01 00:08:46,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-01 00:08:46,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-01 00:08:46,774 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-01 00:08:46,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:46,774 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-01 00:08:46,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-01 00:08:46,775 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-01 00:08:46,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-01 00:08:46,775 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:46,775 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1] [2018-10-01 00:08:46,775 INFO L423 AbstractCegarLoop]: === Iteration 50 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:08:46,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:46,775 INFO L82 PathProgramCache]: Analyzing trace with hash -96281179, now seen corresponding path program 49 times [2018-10-01 00:08:46,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:46,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:46,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:46,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:46,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:46,782 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:08:46,782 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:08:46,782 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:08:46,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:49,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:51,567 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:08:51,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-01 00:08:51,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-01 00:08:51,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-01 00:08:51,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-01 00:08:51,569 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-10-01 00:08:53,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:53,720 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-01 00:08:53,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-01 00:08:53,722 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-01 00:08:53,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:53,723 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:08:53,723 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:08:53,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2018-10-01 00:08:53,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:08:53,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-01 00:08:53,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-01 00:08:53,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-01 00:08:53,729 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-01 00:08:53,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:53,730 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-01 00:08:53,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-01 00:08:53,730 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-01 00:08:53,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-01 00:08:53,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:53,730 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1] [2018-10-01 00:08:53,731 INFO L423 AbstractCegarLoop]: === Iteration 51 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:08:53,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:53,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1310248772, now seen corresponding path program 50 times [2018-10-01 00:08:53,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:53,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:53,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:53,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:53,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:53,738 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:08:53,738 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:08:53,738 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:08:53,751 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:08:56,423 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:08:56,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:56,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:58,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:58,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:08:58,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-01 00:08:58,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-01 00:08:58,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-01 00:08:58,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-01 00:08:58,197 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-10-01 00:09:00,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:00,472 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-01 00:09:00,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-01 00:09:00,472 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-01 00:09:00,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:00,473 INFO L225 Difference]: With dead ends: 58 [2018-10-01 00:09:00,474 INFO L226 Difference]: Without dead ends: 56 [2018-10-01 00:09:00,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2018-10-01 00:09:00,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-01 00:09:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-01 00:09:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-01 00:09:00,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-01 00:09:00,479 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-01 00:09:00,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:00,479 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-01 00:09:00,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-01 00:09:00,479 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-01 00:09:00,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-01 00:09:00,480 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:00,480 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1] [2018-10-01 00:09:00,480 INFO L423 AbstractCegarLoop]: === Iteration 52 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:09:00,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:00,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1963004293, now seen corresponding path program 51 times [2018-10-01 00:09:00,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:00,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:00,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:00,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:00,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:00,488 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:09:00,488 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:09:00,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:09:00,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:09:03,740 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-01 00:09:03,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:03,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:05,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:09:05,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-01 00:09:05,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-01 00:09:05,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-01 00:09:05,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-01 00:09:05,555 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-10-01 00:09:08,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:08,057 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-01 00:09:08,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-01 00:09:08,057 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-10-01 00:09:08,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:08,058 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:09:08,058 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:09:08,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2018-10-01 00:09:08,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:09:08,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-01 00:09:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-01 00:09:08,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-01 00:09:08,064 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-01 00:09:08,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:08,065 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-01 00:09:08,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-01 00:09:08,065 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-01 00:09:08,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-01 00:09:08,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:08,065 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1] [2018-10-01 00:09:08,066 INFO L423 AbstractCegarLoop]: === Iteration 53 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:09:08,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:08,066 INFO L82 PathProgramCache]: Analyzing trace with hash 723588964, now seen corresponding path program 52 times [2018-10-01 00:09:08,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:08,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:08,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:08,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:08,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:08,074 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:09:08,074 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:09:08,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:09:08,093 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:09:11,314 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:09:11,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:11,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:13,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:09:13,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-10-01 00:09:13,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-01 00:09:13,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-01 00:09:13,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-01 00:09:13,137 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-10-01 00:09:15,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:15,575 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-01 00:09:15,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-01 00:09:15,576 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-10-01 00:09:15,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:15,577 INFO L225 Difference]: With dead ends: 60 [2018-10-01 00:09:15,577 INFO L226 Difference]: Without dead ends: 58 [2018-10-01 00:09:15,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2018-10-01 00:09:15,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-01 00:09:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-01 00:09:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-01 00:09:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-01 00:09:15,582 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-01 00:09:15,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:15,582 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-01 00:09:15,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-01 00:09:15,582 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-01 00:09:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-01 00:09:15,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:15,582 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1] [2018-10-01 00:09:15,583 INFO L423 AbstractCegarLoop]: === Iteration 54 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:09:15,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:15,583 INFO L82 PathProgramCache]: Analyzing trace with hash 956419429, now seen corresponding path program 53 times [2018-10-01 00:09:15,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:15,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:15,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:15,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:15,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:15,589 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:09:15,589 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:09:15,589 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:09:15,596 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:09:19,593 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-01 00:09:19,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:19,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:21,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:09:21,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-01 00:09:21,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-01 00:09:21,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-01 00:09:21,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-01 00:09:21,654 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-10-01 00:09:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:24,241 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-01 00:09:24,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-01 00:09:24,242 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-10-01 00:09:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:24,243 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:09:24,243 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:09:24,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2018-10-01 00:09:24,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:09:24,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-01 00:09:24,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-01 00:09:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-01 00:09:24,247 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-01 00:09:24,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:24,247 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-01 00:09:24,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-01 00:09:24,248 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-01 00:09:24,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-01 00:09:24,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:24,248 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1] [2018-10-01 00:09:24,248 INFO L423 AbstractCegarLoop]: === Iteration 55 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:09:24,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:24,248 INFO L82 PathProgramCache]: Analyzing trace with hash -415770748, now seen corresponding path program 54 times [2018-10-01 00:09:24,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:24,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:24,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:24,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:24,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:24,255 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:09:24,256 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:09:24,256 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:09:24,271 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:09:28,619 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-01 00:09:28,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:28,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:30,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:09:30,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-01 00:09:30,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-01 00:09:30,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-01 00:09:30,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-01 00:09:30,580 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-10-01 00:09:33,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:33,254 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-01 00:09:33,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-01 00:09:33,255 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-01 00:09:33,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:33,255 INFO L225 Difference]: With dead ends: 62 [2018-10-01 00:09:33,256 INFO L226 Difference]: Without dead ends: 60 [2018-10-01 00:09:33,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2018-10-01 00:09:33,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-01 00:09:33,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-01 00:09:33,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-01 00:09:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-01 00:09:33,261 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-01 00:09:33,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:33,262 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-01 00:09:33,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-01 00:09:33,262 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-01 00:09:33,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-01 00:09:33,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:33,262 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1] [2018-10-01 00:09:33,262 INFO L423 AbstractCegarLoop]: === Iteration 56 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:09:33,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:33,263 INFO L82 PathProgramCache]: Analyzing trace with hash -3993275, now seen corresponding path program 55 times [2018-10-01 00:09:33,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:33,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:33,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:33,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:33,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:33,270 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:09:33,270 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:09:33,270 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:09:33,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:37,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:39,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:09:39,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-01 00:09:39,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-01 00:09:39,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-01 00:09:39,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-01 00:09:39,141 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-10-01 00:09:41,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:41,902 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-01 00:09:41,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-01 00:09:41,903 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-10-01 00:09:41,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:41,903 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:09:41,904 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:09:41,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2018-10-01 00:09:41,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:09:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-01 00:09:41,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-01 00:09:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-01 00:09:41,910 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-01 00:09:41,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:41,910 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-01 00:09:41,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-01 00:09:41,910 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-01 00:09:41,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-01 00:09:41,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:41,911 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1] [2018-10-01 00:09:41,911 INFO L423 AbstractCegarLoop]: === Iteration 57 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:09:41,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:41,911 INFO L82 PathProgramCache]: Analyzing trace with hash -123793500, now seen corresponding path program 56 times [2018-10-01 00:09:41,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:41,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:41,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:41,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:41,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:41,919 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:09:41,919 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:09:41,919 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:09:41,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:09:45,760 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:09:45,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:45,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:48,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:09:48,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-10-01 00:09:48,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-01 00:09:48,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-01 00:09:48,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-10-01 00:09:48,163 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-10-01 00:09:50,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:50,908 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-01 00:09:50,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-01 00:09:50,909 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-10-01 00:09:50,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:50,909 INFO L225 Difference]: With dead ends: 64 [2018-10-01 00:09:50,909 INFO L226 Difference]: Without dead ends: 62 [2018-10-01 00:09:50,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2018-10-01 00:09:50,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-01 00:09:50,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-01 00:09:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-01 00:09:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-01 00:09:50,916 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-01 00:09:50,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:50,916 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-01 00:09:50,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-01 00:09:50,916 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-01 00:09:50,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-01 00:09:50,917 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:50,917 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1] [2018-10-01 00:09:50,917 INFO L423 AbstractCegarLoop]: === Iteration 58 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:09:50,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:50,917 INFO L82 PathProgramCache]: Analyzing trace with hash 457366821, now seen corresponding path program 57 times [2018-10-01 00:09:50,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:50,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:50,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:50,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:50,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:50,925 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:09:50,925 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:09:50,925 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:09:50,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:09:55,991 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-01 00:09:55,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:56,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:58,943 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:09:58,943 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-01 00:09:58,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-01 00:09:58,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-01 00:09:58,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-10-01 00:09:58,944 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-10-01 00:10:01,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:01,786 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-01 00:10:01,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-01 00:10:01,787 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-10-01 00:10:01,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:01,788 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:10:01,788 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:10:01,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2018-10-01 00:10:01,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:10:01,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-01 00:10:01,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-01 00:10:01,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-01 00:10:01,792 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-01 00:10:01,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:01,793 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-01 00:10:01,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-01 00:10:01,793 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-01 00:10:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-01 00:10:01,793 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:01,794 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1] [2018-10-01 00:10:01,794 INFO L423 AbstractCegarLoop]: === Iteration 59 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:10:01,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:01,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1293467588, now seen corresponding path program 58 times [2018-10-01 00:10:01,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:01,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:01,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:01,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:01,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:01,801 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:10:01,802 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:10:01,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-01 00:10:01,816 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:10:06,506 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:10:06,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:06,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:08,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:10:08,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-01 00:10:08,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-01 00:10:08,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-01 00:10:08,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-10-01 00:10:08,996 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-10-01 00:10:11,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:11,942 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-01 00:10:11,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-01 00:10:11,942 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-01 00:10:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:11,943 INFO L225 Difference]: With dead ends: 66 [2018-10-01 00:10:11,943 INFO L226 Difference]: Without dead ends: 64 [2018-10-01 00:10:11,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2018-10-01 00:10:11,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-01 00:10:11,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-01 00:10:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-01 00:10:11,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-01 00:10:11,948 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-01 00:10:11,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:11,948 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-01 00:10:11,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-01 00:10:11,948 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-01 00:10:11,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-01 00:10:11,949 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:11,949 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1] [2018-10-01 00:10:11,949 INFO L423 AbstractCegarLoop]: === Iteration 60 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:10:11,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:11,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1442787589, now seen corresponding path program 59 times [2018-10-01 00:10:11,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:11,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:11,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:11,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:11,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:11,958 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:10:11,959 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:10:11,959 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 (exit command is (exit), workingDir is null) [2018-10-01 00:10:11,974 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:10:17,985 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-01 00:10:17,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:18,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:20,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:10:20,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-01 00:10:20,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-01 00:10:20,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-01 00:10:20,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-10-01 00:10:20,290 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-10-01 00:10:23,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:23,439 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-01 00:10:23,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-01 00:10:23,439 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-10-01 00:10:23,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:23,440 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:10:23,440 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:10:23,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2018-10-01 00:10:23,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:10:23,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-01 00:10:23,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-01 00:10:23,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-01 00:10:23,445 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-01 00:10:23,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:23,445 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-01 00:10:23,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-01 00:10:23,445 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-01 00:10:23,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-01 00:10:23,446 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:23,446 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1] [2018-10-01 00:10:23,446 INFO L423 AbstractCegarLoop]: === Iteration 61 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:10:23,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:23,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1776740324, now seen corresponding path program 60 times [2018-10-01 00:10:23,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:23,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:23,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:23,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:23,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:23,460 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:10:23,460 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:10:23,460 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:10:23,474 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:10:29,681 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-01 00:10:29,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:29,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:31,982 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:10:31,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-10-01 00:10:31,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-01 00:10:31,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-01 00:10:31,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-10-01 00:10:31,983 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-10-01 00:10:35,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:35,210 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-01 00:10:35,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-01 00:10:35,211 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-10-01 00:10:35,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:35,212 INFO L225 Difference]: With dead ends: 68 [2018-10-01 00:10:35,212 INFO L226 Difference]: Without dead ends: 66 [2018-10-01 00:10:35,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2018-10-01 00:10:35,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-01 00:10:35,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-01 00:10:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-01 00:10:35,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-01 00:10:35,217 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-01 00:10:35,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:35,218 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-01 00:10:35,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-01 00:10:35,218 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-01 00:10:35,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-01 00:10:35,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:35,218 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1] [2018-10-01 00:10:35,218 INFO L423 AbstractCegarLoop]: === Iteration 62 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:10:35,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:35,219 INFO L82 PathProgramCache]: Analyzing trace with hash -755626779, now seen corresponding path program 61 times [2018-10-01 00:10:35,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:35,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:35,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:35,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:35,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:35,225 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:10:35,225 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:10:35,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:10:35,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:40,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:43,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:10:43,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-01 00:10:43,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-01 00:10:43,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-01 00:10:43,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-10-01 00:10:43,518 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-10-01 00:10:46,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:46,752 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-01 00:10:46,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-01 00:10:46,753 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-10-01 00:10:46,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:46,754 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:10:46,754 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:10:46,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2018-10-01 00:10:46,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:10:46,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-01 00:10:46,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-01 00:10:46,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-01 00:10:46,761 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-01 00:10:46,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:46,761 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-01 00:10:46,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-01 00:10:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-01 00:10:46,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-01 00:10:46,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:46,761 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1] [2018-10-01 00:10:46,762 INFO L423 AbstractCegarLoop]: === Iteration 63 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:10:46,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:46,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1949595644, now seen corresponding path program 62 times [2018-10-01 00:10:46,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:46,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:46,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:46,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:46,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:46,769 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:10:46,769 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:10:46,769 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:10:46,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:10:52,788 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:10:52,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:52,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:55,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:10:55,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-01 00:10:55,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-01 00:10:55,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-01 00:10:55,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-10-01 00:10:55,398 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-10-01 00:10:58,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:58,859 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-01 00:10:58,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-01 00:10:58,860 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-01 00:10:58,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:58,860 INFO L225 Difference]: With dead ends: 70 [2018-10-01 00:10:58,861 INFO L226 Difference]: Without dead ends: 68 [2018-10-01 00:10:58,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2018-10-01 00:10:58,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-01 00:10:58,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-01 00:10:58,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-01 00:10:58,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-01 00:10:58,866 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-01 00:10:58,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:58,866 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-01 00:10:58,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-01 00:10:58,866 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-01 00:10:58,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-01 00:10:58,867 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:58,867 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1] [2018-10-01 00:10:58,867 INFO L423 AbstractCegarLoop]: === Iteration 64 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:10:58,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:58,867 INFO L82 PathProgramCache]: Analyzing trace with hash -307924795, now seen corresponding path program 63 times [2018-10-01 00:10:58,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:58,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:58,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:58,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:58,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:58,875 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:10:58,875 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:10:58,875 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:10:58,890 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:11:06,810 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-01 00:11:06,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:06,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:09,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:11:09,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-01 00:11:09,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-01 00:11:09,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-01 00:11:09,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-10-01 00:11:09,676 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-10-01 00:11:13,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:13,114 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-01 00:11:13,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-01 00:11:13,115 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-10-01 00:11:13,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:13,116 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:11:13,116 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:11:13,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2018-10-01 00:11:13,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:11:13,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-01 00:11:13,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-01 00:11:13,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-01 00:11:13,122 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-01 00:11:13,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:13,123 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-01 00:11:13,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-01 00:11:13,123 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-01 00:11:13,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-01 00:11:13,123 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:13,123 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1] [2018-10-01 00:11:13,124 INFO L423 AbstractCegarLoop]: === Iteration 65 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:11:13,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:13,124 INFO L82 PathProgramCache]: Analyzing trace with hash -955736028, now seen corresponding path program 64 times [2018-10-01 00:11:13,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:13,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:13,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:13,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:13,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:13,132 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:11:13,133 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:11:13,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:11:13,146 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:11:20,130 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:11:20,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:20,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:23,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:11:23,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-10-01 00:11:23,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-01 00:11:23,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-01 00:11:23,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-10-01 00:11:23,645 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-10-01 00:11:27,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:27,230 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-01 00:11:27,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-01 00:11:27,231 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-10-01 00:11:27,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:27,231 INFO L225 Difference]: With dead ends: 72 [2018-10-01 00:11:27,232 INFO L226 Difference]: Without dead ends: 70 [2018-10-01 00:11:27,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2018-10-01 00:11:27,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-01 00:11:27,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-01 00:11:27,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-01 00:11:27,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-01 00:11:27,237 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-01 00:11:27,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:27,237 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-01 00:11:27,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-01 00:11:27,237 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-01 00:11:27,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-01 00:11:27,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:27,238 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1] [2018-10-01 00:11:27,238 INFO L423 AbstractCegarLoop]: === Iteration 66 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:11:27,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:27,239 INFO L82 PathProgramCache]: Analyzing trace with hash 436952229, now seen corresponding path program 65 times [2018-10-01 00:11:27,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:27,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:27,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:27,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:27,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:27,246 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:11:27,246 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:11:27,246 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:11:27,261 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:11:37,072 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-01 00:11:37,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:37,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:40,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:11:40,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-01 00:11:40,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-01 00:11:40,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-01 00:11:40,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-10-01 00:11:40,974 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-10-01 00:11:44,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:11:44,636 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-01 00:11:44,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-01 00:11:44,636 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-10-01 00:11:44,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:11:44,637 INFO L225 Difference]: With dead ends: 73 [2018-10-01 00:11:44,637 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 00:11:44,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2018-10-01 00:11:44,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 00:11:44,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-01 00:11:44,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-01 00:11:44,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-01 00:11:44,644 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-01 00:11:44,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:11:44,644 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-01 00:11:44,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-01 00:11:44,644 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-01 00:11:44,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-01 00:11:44,645 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:11:44,645 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1] [2018-10-01 00:11:44,645 INFO L423 AbstractCegarLoop]: === Iteration 67 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:11:44,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:11:44,645 INFO L82 PathProgramCache]: Analyzing trace with hash 660615236, now seen corresponding path program 66 times [2018-10-01 00:11:44,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:11:44,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:11:44,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:44,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:11:44,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:11:44,652 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:11:44,652 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:11:44,652 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:11:44,667 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:11:56,319 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-01 00:11:56,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:11:56,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:11:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:11:59,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:11:59,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-10-01 00:11:59,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-01 00:11:59,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-01 00:11:59,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-10-01 00:11:59,160 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-10-01 00:12:02,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:12:02,953 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-01 00:12:02,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-01 00:12:02,954 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-10-01 00:12:02,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:12:02,955 INFO L225 Difference]: With dead ends: 74 [2018-10-01 00:12:02,955 INFO L226 Difference]: Without dead ends: 72 [2018-10-01 00:12:02,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2018-10-01 00:12:02,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-01 00:12:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-01 00:12:02,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-01 00:12:02,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-01 00:12:02,960 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-01 00:12:02,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:12:02,960 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-01 00:12:02,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-01 00:12:02,961 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-01 00:12:02,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-01 00:12:02,961 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:12:02,961 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1] [2018-10-01 00:12:02,961 INFO L423 AbstractCegarLoop]: === Iteration 68 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:12:02,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:12:02,961 INFO L82 PathProgramCache]: Analyzing trace with hash -995766139, now seen corresponding path program 67 times [2018-10-01 00:12:02,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:12:02,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:12:02,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:02,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:12:02,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:02,967 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:12:02,967 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:12:02,967 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 (exit command is (exit), workingDir is null) [2018-10-01 00:12:02,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:12:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:12:12,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:12:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:15,298 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:12:15,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-01 00:12:15,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-01 00:12:15,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-01 00:12:15,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-10-01 00:12:15,300 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-10-01 00:12:19,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:12:19,232 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-01 00:12:19,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-01 00:12:19,232 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-10-01 00:12:19,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:12:19,233 INFO L225 Difference]: With dead ends: 75 [2018-10-01 00:12:19,234 INFO L226 Difference]: Without dead ends: 73 [2018-10-01 00:12:19,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2018-10-01 00:12:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-01 00:12:19,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-01 00:12:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-01 00:12:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-01 00:12:19,240 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-01 00:12:19,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:12:19,240 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-01 00:12:19,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-01 00:12:19,240 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-01 00:12:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-01 00:12:19,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:12:19,241 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1] [2018-10-01 00:12:19,241 INFO L423 AbstractCegarLoop]: === Iteration 69 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:12:19,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:12:19,242 INFO L82 PathProgramCache]: Analyzing trace with hash -803981212, now seen corresponding path program 68 times [2018-10-01 00:12:19,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:12:19,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:12:19,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:19,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:12:19,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:19,249 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:12:19,249 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:12:19,250 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:12:19,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:12:29,824 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:12:29,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:12:29,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:12:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:32,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:12:32,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-10-01 00:12:32,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-01 00:12:32,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-01 00:12:32,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-10-01 00:12:32,704 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-10-01 00:12:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:12:36,693 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-01 00:12:36,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-01 00:12:36,694 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-10-01 00:12:36,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:12:36,695 INFO L225 Difference]: With dead ends: 76 [2018-10-01 00:12:36,695 INFO L226 Difference]: Without dead ends: 74 [2018-10-01 00:12:36,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2018-10-01 00:12:36,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-01 00:12:36,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-01 00:12:36,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-01 00:12:36,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-01 00:12:36,703 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-01 00:12:36,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:12:36,703 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-01 00:12:36,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-01 00:12:36,703 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-01 00:12:36,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-01 00:12:36,704 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:12:36,704 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1] [2018-10-01 00:12:36,704 INFO L423 AbstractCegarLoop]: === Iteration 70 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:12:36,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:12:36,705 INFO L82 PathProgramCache]: Analyzing trace with hash 846384229, now seen corresponding path program 69 times [2018-10-01 00:12:36,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:12:36,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:12:36,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:36,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:12:36,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:36,713 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:12:36,713 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:12:36,713 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:12:36,723 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:12:50,531 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-01 00:12:50,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:12:50,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:12:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:12:53,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:12:53,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-01 00:12:53,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-01 00:12:53,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-01 00:12:53,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-10-01 00:12:53,447 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-10-01 00:12:57,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:12:57,299 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-01 00:12:57,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-01 00:12:57,299 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-10-01 00:12:57,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:12:57,300 INFO L225 Difference]: With dead ends: 77 [2018-10-01 00:12:57,300 INFO L226 Difference]: Without dead ends: 75 [2018-10-01 00:12:57,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=147, Invalid=5255, Unknown=0, NotChecked=0, Total=5402 [2018-10-01 00:12:57,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-01 00:12:57,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-01 00:12:57,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-01 00:12:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-01 00:12:57,308 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-01 00:12:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:12:57,308 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-01 00:12:57,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-01 00:12:57,308 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-01 00:12:57,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-01 00:12:57,309 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:12:57,309 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1] [2018-10-01 00:12:57,309 INFO L423 AbstractCegarLoop]: === Iteration 71 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:12:57,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:12:57,309 INFO L82 PathProgramCache]: Analyzing trace with hash 468105348, now seen corresponding path program 70 times [2018-10-01 00:12:57,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:12:57,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:12:57,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:57,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:12:57,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:12:57,317 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:12:57,317 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:12:57,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:12:57,332 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:13:09,101 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:13:09,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:13:09,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:13:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:12,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:13:12,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-10-01 00:13:12,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-01 00:13:12,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-01 00:13:12,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-10-01 00:13:12,103 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-10-01 00:13:16,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:13:16,053 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-01 00:13:16,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-01 00:13:16,053 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-10-01 00:13:16,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:13:16,054 INFO L225 Difference]: With dead ends: 78 [2018-10-01 00:13:16,055 INFO L226 Difference]: Without dead ends: 76 [2018-10-01 00:13:16,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2018-10-01 00:13:16,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-01 00:13:16,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-01 00:13:16,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-01 00:13:16,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-01 00:13:16,061 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-01 00:13:16,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:13:16,061 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-01 00:13:16,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-01 00:13:16,062 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-01 00:13:16,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-01 00:13:16,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:13:16,062 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1] [2018-10-01 00:13:16,062 INFO L423 AbstractCegarLoop]: === Iteration 72 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:13:16,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:13:16,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1626361925, now seen corresponding path program 71 times [2018-10-01 00:13:16,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:13:16,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:13:16,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:16,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:13:16,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:16,069 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:13:16,069 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:13:16,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:13:16,083 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:13:31,432 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-01 00:13:31,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:13:31,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:13:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:34,520 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:13:34,520 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-10-01 00:13:34,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-01 00:13:34,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-01 00:13:34,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-10-01 00:13:34,521 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-10-01 00:13:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:13:38,603 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-01 00:13:38,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-01 00:13:38,603 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-10-01 00:13:38,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:13:38,604 INFO L225 Difference]: With dead ends: 79 [2018-10-01 00:13:38,604 INFO L226 Difference]: Without dead ends: 77 [2018-10-01 00:13:38,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=151, Invalid=5549, Unknown=0, NotChecked=0, Total=5700 [2018-10-01 00:13:38,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-01 00:13:38,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-01 00:13:38,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-01 00:13:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-01 00:13:38,611 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-01 00:13:38,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:13:38,611 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-01 00:13:38,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-01 00:13:38,612 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-01 00:13:38,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-01 00:13:38,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:13:38,612 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1] [2018-10-01 00:13:38,612 INFO L423 AbstractCegarLoop]: === Iteration 73 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:13:38,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:13:38,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1122389852, now seen corresponding path program 72 times [2018-10-01 00:13:38,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:13:38,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:13:38,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:38,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:13:38,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:13:38,619 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:13:38,619 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:13:38,619 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:13:38,626 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:13:54,672 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-01 00:13:54,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:13:54,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:13:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:13:57,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:13:57,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-10-01 00:13:57,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-01 00:13:57,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-01 00:13:57,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-10-01 00:13:57,889 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-10-01 00:14:02,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:14:02,047 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-01 00:14:02,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-01 00:14:02,047 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-10-01 00:14:02,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:14:02,048 INFO L225 Difference]: With dead ends: 80 [2018-10-01 00:14:02,048 INFO L226 Difference]: Without dead ends: 78 [2018-10-01 00:14:02,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2018-10-01 00:14:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-01 00:14:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-01 00:14:02,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-01 00:14:02,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-01 00:14:02,054 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-01 00:14:02,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:14:02,054 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-01 00:14:02,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-01 00:14:02,055 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-01 00:14:02,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-01 00:14:02,055 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:14:02,055 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1] [2018-10-01 00:14:02,055 INFO L423 AbstractCegarLoop]: === Iteration 74 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:14:02,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:14:02,055 INFO L82 PathProgramCache]: Analyzing trace with hash -434349019, now seen corresponding path program 73 times [2018-10-01 00:14:02,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:14:02,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:14:02,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:02,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:14:02,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:02,063 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:14:02,063 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:14:02,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:14:02,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:14:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:14:15,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:14:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:18,567 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:14:18,567 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-10-01 00:14:18,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-01 00:14:18,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-01 00:14:18,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-10-01 00:14:18,568 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-10-01 00:14:22,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:14:22,861 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-01 00:14:22,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-01 00:14:22,861 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-10-01 00:14:22,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:14:22,862 INFO L225 Difference]: With dead ends: 81 [2018-10-01 00:14:22,862 INFO L226 Difference]: Without dead ends: 79 [2018-10-01 00:14:22,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=155, Invalid=5851, Unknown=0, NotChecked=0, Total=6006 [2018-10-01 00:14:22,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-01 00:14:22,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-01 00:14:22,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-01 00:14:22,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-01 00:14:22,867 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-01 00:14:22,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:14:22,867 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-01 00:14:22,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-01 00:14:22,867 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-01 00:14:22,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-01 00:14:22,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:14:22,868 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1] [2018-10-01 00:14:22,868 INFO L423 AbstractCegarLoop]: === Iteration 75 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:14:22,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:14:22,868 INFO L82 PathProgramCache]: Analyzing trace with hash -579919676, now seen corresponding path program 74 times [2018-10-01 00:14:22,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:14:22,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:14:22,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:22,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:14:22,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:22,875 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:14:22,875 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:14:22,875 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:14:22,891 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:14:37,042 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:14:37,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:14:37,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:14:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:14:40,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:14:40,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-10-01 00:14:40,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-01 00:14:40,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-01 00:14:40,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-10-01 00:14:40,340 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-10-01 00:14:44,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:14:44,751 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-01 00:14:44,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-01 00:14:44,751 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-10-01 00:14:44,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:14:44,752 INFO L225 Difference]: With dead ends: 82 [2018-10-01 00:14:44,752 INFO L226 Difference]: Without dead ends: 80 [2018-10-01 00:14:44,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=157, Invalid=6005, Unknown=0, NotChecked=0, Total=6162 [2018-10-01 00:14:44,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-01 00:14:44,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-01 00:14:44,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-01 00:14:44,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-01 00:14:44,759 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-01 00:14:44,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:14:44,759 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-01 00:14:44,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-01 00:14:44,759 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-01 00:14:44,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-01 00:14:44,760 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:14:44,760 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1] [2018-10-01 00:14:44,760 INFO L423 AbstractCegarLoop]: === Iteration 76 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:14:44,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:14:44,760 INFO L82 PathProgramCache]: Analyzing trace with hash -797642747, now seen corresponding path program 75 times [2018-10-01 00:14:44,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:14:44,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:14:44,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:44,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:14:44,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:14:44,768 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:14:44,768 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:14:44,768 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:14:44,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:15:03,738 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-01 00:15:03,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:15:03,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:15:07,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:07,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:15:07,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-10-01 00:15:07,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-01 00:15:07,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-01 00:15:07,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-10-01 00:15:07,558 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-10-01 00:15:12,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:15:12,076 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-01 00:15:12,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-01 00:15:12,076 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-10-01 00:15:12,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:15:12,077 INFO L225 Difference]: With dead ends: 83 [2018-10-01 00:15:12,077 INFO L226 Difference]: Without dead ends: 81 [2018-10-01 00:15:12,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=159, Invalid=6161, Unknown=0, NotChecked=0, Total=6320 [2018-10-01 00:15:12,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-01 00:15:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-01 00:15:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-01 00:15:12,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-01 00:15:12,084 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-01 00:15:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:15:12,084 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-01 00:15:12,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-01 00:15:12,084 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-01 00:15:12,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-01 00:15:12,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:15:12,085 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1] [2018-10-01 00:15:12,085 INFO L423 AbstractCegarLoop]: === Iteration 77 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:15:12,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:15:12,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1042876644, now seen corresponding path program 76 times [2018-10-01 00:15:12,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:15:12,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:15:12,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:12,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:15:12,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:12,093 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:15:12,093 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:15:12,093 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:15:12,107 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:15:27,694 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:15:27,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:15:27,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:15:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:15:31,174 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:15:31,174 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-10-01 00:15:31,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-01 00:15:31,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-01 00:15:31,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-10-01 00:15:31,175 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-10-01 00:15:35,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:15:35,833 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-01 00:15:35,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-01 00:15:35,834 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-10-01 00:15:35,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:15:35,835 INFO L225 Difference]: With dead ends: 84 [2018-10-01 00:15:35,835 INFO L226 Difference]: Without dead ends: 82 [2018-10-01 00:15:35,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=161, Invalid=6319, Unknown=0, NotChecked=0, Total=6480 [2018-10-01 00:15:35,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-01 00:15:35,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-01 00:15:35,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-01 00:15:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-01 00:15:35,840 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-10-01 00:15:35,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:15:35,840 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-01 00:15:35,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-01 00:15:35,841 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-01 00:15:35,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-01 00:15:35,841 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:15:35,841 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1] [2018-10-01 00:15:35,841 INFO L423 AbstractCegarLoop]: === Iteration 78 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:15:35,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:15:35,841 INFO L82 PathProgramCache]: Analyzing trace with hash -2030564379, now seen corresponding path program 77 times [2018-10-01 00:15:35,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:15:35,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:15:35,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:35,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:15:35,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:15:35,848 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:15:35,848 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:15:35,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:15:35,856 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:15:56,660 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-01 00:15:56,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:15:56,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:16:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:00,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:16:00,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-10-01 00:16:00,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-01 00:16:00,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-01 00:16:00,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-10-01 00:16:00,222 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-10-01 00:16:04,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:16:04,944 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-01 00:16:04,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-01 00:16:04,944 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-10-01 00:16:04,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:16:04,945 INFO L225 Difference]: With dead ends: 85 [2018-10-01 00:16:04,945 INFO L226 Difference]: Without dead ends: 83 [2018-10-01 00:16:04,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=163, Invalid=6479, Unknown=0, NotChecked=0, Total=6642 [2018-10-01 00:16:04,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-01 00:16:04,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-01 00:16:04,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-01 00:16:04,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-01 00:16:04,951 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-10-01 00:16:04,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:16:04,951 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-01 00:16:04,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-01 00:16:04,951 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-01 00:16:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-01 00:16:04,951 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:16:04,951 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1] [2018-10-01 00:16:04,952 INFO L423 AbstractCegarLoop]: === Iteration 79 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:16:04,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:16:04,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1477011716, now seen corresponding path program 78 times [2018-10-01 00:16:04,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:16:04,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:16:04,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:04,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:16:04,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:04,958 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:16:04,958 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:16:04,958 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:16:04,965 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:16:27,072 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-01 00:16:27,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:16:27,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:16:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:30,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:16:30,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-10-01 00:16:30,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-01 00:16:30,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-01 00:16:30,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-10-01 00:16:30,723 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-10-01 00:16:35,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:16:35,554 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-01 00:16:35,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-01 00:16:35,554 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-10-01 00:16:35,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:16:35,555 INFO L225 Difference]: With dead ends: 86 [2018-10-01 00:16:35,555 INFO L226 Difference]: Without dead ends: 84 [2018-10-01 00:16:35,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=165, Invalid=6641, Unknown=0, NotChecked=0, Total=6806 [2018-10-01 00:16:35,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-01 00:16:35,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-01 00:16:35,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-01 00:16:35,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-01 00:16:35,561 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-10-01 00:16:35,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:16:35,561 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-01 00:16:35,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-01 00:16:35,561 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-01 00:16:35,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-01 00:16:35,562 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:16:35,562 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1] [2018-10-01 00:16:35,562 INFO L423 AbstractCegarLoop]: === Iteration 80 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:16:35,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:16:35,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1457279035, now seen corresponding path program 79 times [2018-10-01 00:16:35,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:16:35,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:16:35,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:35,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:16:35,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:16:35,575 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:16:35,577 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:16:35,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:16:35,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:16:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:16:54,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:16:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:16:57,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:16:57,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-10-01 00:16:57,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-01 00:16:57,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-01 00:16:57,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-10-01 00:16:57,654 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-10-01 00:17:02,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:17:02,647 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-01 00:17:02,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-01 00:17:02,647 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-10-01 00:17:02,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:17:02,648 INFO L225 Difference]: With dead ends: 87 [2018-10-01 00:17:02,648 INFO L226 Difference]: Without dead ends: 85 [2018-10-01 00:17:02,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=167, Invalid=6805, Unknown=0, NotChecked=0, Total=6972 [2018-10-01 00:17:02,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-01 00:17:02,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-01 00:17:02,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-01 00:17:02,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-01 00:17:02,654 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-10-01 00:17:02,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:17:02,654 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-01 00:17:02,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-01 00:17:02,654 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-01 00:17:02,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-01 00:17:02,654 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:17:02,654 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1] [2018-10-01 00:17:02,655 INFO L423 AbstractCegarLoop]: === Iteration 81 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:17:02,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:17:02,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2068988196, now seen corresponding path program 80 times [2018-10-01 00:17:02,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:17:02,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:17:02,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:02,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:17:02,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:02,662 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:17:02,662 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:17:02,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:17:02,670 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:17:21,595 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:17:21,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:17:21,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:17:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:25,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:17:25,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-10-01 00:17:25,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-01 00:17:25,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-01 00:17:25,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2018-10-01 00:17:25,390 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-10-01 00:17:30,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:17:30,495 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-01 00:17:30,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-01 00:17:30,495 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-10-01 00:17:30,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:17:30,496 INFO L225 Difference]: With dead ends: 88 [2018-10-01 00:17:30,496 INFO L226 Difference]: Without dead ends: 86 [2018-10-01 00:17:30,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=169, Invalid=6971, Unknown=0, NotChecked=0, Total=7140 [2018-10-01 00:17:30,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-01 00:17:30,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-01 00:17:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-01 00:17:30,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-01 00:17:30,503 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-10-01 00:17:30,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:17:30,503 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-01 00:17:30,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-01 00:17:30,503 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-01 00:17:30,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-01 00:17:30,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:17:30,504 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1] [2018-10-01 00:17:30,504 INFO L423 AbstractCegarLoop]: === Iteration 82 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:17:30,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:17:30,504 INFO L82 PathProgramCache]: Analyzing trace with hash -285877339, now seen corresponding path program 81 times [2018-10-01 00:17:30,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:17:30,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:17:30,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:30,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:17:30,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:17:30,512 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:17:30,512 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:17:30,513 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:17:30,529 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:17:56,036 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-01 00:17:56,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:17:56,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:17:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:17:59,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:17:59,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-10-01 00:17:59,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-01 00:17:59,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-01 00:17:59,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2018-10-01 00:17:59,895 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-10-01 00:18:05,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:18:05,135 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-01 00:18:05,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-01 00:18:05,136 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-10-01 00:18:05,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:18:05,137 INFO L225 Difference]: With dead ends: 89 [2018-10-01 00:18:05,137 INFO L226 Difference]: Without dead ends: 87 [2018-10-01 00:18:05,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=171, Invalid=7139, Unknown=0, NotChecked=0, Total=7310 [2018-10-01 00:18:05,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-01 00:18:05,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-01 00:18:05,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-01 00:18:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-01 00:18:05,143 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-10-01 00:18:05,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:18:05,143 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-01 00:18:05,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-01 00:18:05,143 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-01 00:18:05,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-01 00:18:05,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:18:05,144 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1] [2018-10-01 00:18:05,144 INFO L423 AbstractCegarLoop]: === Iteration 83 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:18:05,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:18:05,144 INFO L82 PathProgramCache]: Analyzing trace with hash -272264892, now seen corresponding path program 82 times [2018-10-01 00:18:05,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:18:05,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:18:05,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:18:05,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:18:05,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:18:05,151 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:18:05,151 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:18:05,151 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 (exit command is (exit), workingDir is null) [2018-10-01 00:18:05,162 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:18:26,059 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:18:26,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:18:26,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:18:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:18:30,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:18:30,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-10-01 00:18:30,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-01 00:18:30,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-01 00:18:30,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2018-10-01 00:18:30,045 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-10-01 00:18:35,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:18:35,390 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-01 00:18:35,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-01 00:18:35,391 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-10-01 00:18:35,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:18:35,391 INFO L225 Difference]: With dead ends: 90 [2018-10-01 00:18:35,392 INFO L226 Difference]: Without dead ends: 88 [2018-10-01 00:18:35,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=173, Invalid=7309, Unknown=0, NotChecked=0, Total=7482 [2018-10-01 00:18:35,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-01 00:18:35,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-01 00:18:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-01 00:18:35,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-01 00:18:35,397 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-10-01 00:18:35,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:18:35,397 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-01 00:18:35,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-01 00:18:35,397 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-01 00:18:35,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-01 00:18:35,398 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:18:35,398 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1] [2018-10-01 00:18:35,398 INFO L423 AbstractCegarLoop]: === Iteration 84 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:18:35,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:18:35,398 INFO L82 PathProgramCache]: Analyzing trace with hash 149720965, now seen corresponding path program 83 times [2018-10-01 00:18:35,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:18:35,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:18:35,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:18:35,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:18:35,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:18:35,410 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:18:35,410 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:18:35,410 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:18:35,417 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:19:03,869 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-01 00:19:03,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:19:03,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:19:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:19:07,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:19:07,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-10-01 00:19:07,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-01 00:19:07,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-01 00:19:07,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2018-10-01 00:19:07,896 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-10-01 00:19:13,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:19:13,426 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-01 00:19:13,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-01 00:19:13,427 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-10-01 00:19:13,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:19:13,427 INFO L225 Difference]: With dead ends: 91 [2018-10-01 00:19:13,428 INFO L226 Difference]: Without dead ends: 89 [2018-10-01 00:19:13,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=175, Invalid=7481, Unknown=0, NotChecked=0, Total=7656 [2018-10-01 00:19:13,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-01 00:19:13,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-01 00:19:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-01 00:19:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-01 00:19:13,433 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-10-01 00:19:13,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:19:13,434 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-01 00:19:13,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-01 00:19:13,434 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-01 00:19:13,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-01 00:19:13,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:19:13,434 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1] [2018-10-01 00:19:13,434 INFO L423 AbstractCegarLoop]: === Iteration 85 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:19:13,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:19:13,435 INFO L82 PathProgramCache]: Analyzing trace with hash 346380644, now seen corresponding path program 84 times [2018-10-01 00:19:13,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:19:13,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:19:13,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:19:13,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:19:13,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:19:13,441 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:19:13,441 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:19:13,441 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:19:13,448 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:19:43,071 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-01 00:19:43,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:19:43,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:19:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:19:47,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:19:47,202 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-10-01 00:19:47,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-01 00:19:47,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-01 00:19:47,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2018-10-01 00:19:47,203 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-10-01 00:19:52,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:19:52,774 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-01 00:19:52,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-01 00:19:52,774 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-10-01 00:19:52,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:19:52,775 INFO L225 Difference]: With dead ends: 92 [2018-10-01 00:19:52,775 INFO L226 Difference]: Without dead ends: 90 [2018-10-01 00:19:52,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=177, Invalid=7655, Unknown=0, NotChecked=0, Total=7832 [2018-10-01 00:19:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-01 00:19:52,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-01 00:19:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-01 00:19:52,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-01 00:19:52,783 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-10-01 00:19:52,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:19:52,783 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-01 00:19:52,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-01 00:19:52,783 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-01 00:19:52,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-01 00:19:52,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:19:52,784 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1] [2018-10-01 00:19:52,784 INFO L423 AbstractCegarLoop]: === Iteration 86 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:19:52,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:19:52,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2147103899, now seen corresponding path program 85 times [2018-10-01 00:19:52,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:19:52,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:19:52,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:19:52,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:19:52,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:19:52,790 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:19:52,790 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:19:52,790 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:19:52,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:20:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:20:16,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:20:21,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:20:21,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-01 00:20:21,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-10-01 00:20:21,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-01 00:20:21,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-01 00:20:21,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2018-10-01 00:20:21,236 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-10-01 00:20:27,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:20:27,035 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-01 00:20:27,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-01 00:20:27,036 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-10-01 00:20:27,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:20:27,037 INFO L225 Difference]: With dead ends: 93 [2018-10-01 00:20:27,037 INFO L226 Difference]: Without dead ends: 91 [2018-10-01 00:20:27,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=179, Invalid=7831, Unknown=0, NotChecked=0, Total=8010 [2018-10-01 00:20:27,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-01 00:20:27,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-01 00:20:27,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-01 00:20:27,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-01 00:20:27,043 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-10-01 00:20:27,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:20:27,043 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-01 00:20:27,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-01 00:20:27,043 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-01 00:20:27,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-01 00:20:27,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:20:27,044 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1] [2018-10-01 00:20:27,044 INFO L423 AbstractCegarLoop]: === Iteration 87 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-01 00:20:27,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:20:27,044 INFO L82 PathProgramCache]: Analyzing trace with hash -2135713404, now seen corresponding path program 86 times [2018-10-01 00:20:27,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:20:27,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:20:27,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:20:27,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:20:27,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:20:27,051 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-01 00:20:27,051 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-10-01 00:20:27,051 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:20:27,066 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:20:52,538 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:20:52,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:20:52,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-01 00:20:52,674 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-01 00:20:52,875 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-01 00:20:52,875 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 00:20:52,881 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 00:20:52,881 INFO L202 PluginConnector]: Adding new model Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 12:20:52 BoogieIcfgContainer [2018-10-01 00:20:52,882 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 00:20:52,882 INFO L168 Benchmark]: Toolchain (without parser) took 840208.17 ms. Allocated memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: -331.4 MB). Free memory was 1.4 GB in the beginning and 882.9 MB in the end (delta: 552.9 MB). Peak memory consumption was 221.5 MB. Max. memory is 7.1 GB. [2018-10-01 00:20:52,883 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:20:52,884 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.29 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:20:52,884 INFO L168 Benchmark]: Boogie Preprocessor took 24.49 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:20:52,884 INFO L168 Benchmark]: RCFGBuilder took 259.88 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-01 00:20:52,885 INFO L168 Benchmark]: TraceAbstraction took 839873.52 ms. Allocated memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: -331.4 MB). Free memory was 1.4 GB in the beginning and 882.9 MB in the end (delta: 531.7 MB). Peak memory consumption was 200.4 MB. Max. memory is 7.1 GB. [2018-10-01 00:20:52,887 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.29 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.49 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 259.88 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 839873.52 ms. Allocated memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: -331.4 MB). Free memory was 1.4 GB in the beginning and 882.9 MB in the end (delta: 531.7 MB). Peak memory consumption was 200.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 9]: Timeout (TraceAbstraction) Unable to prove that procedure postcondition always holds (line 9). Cancelled while BasicCegarLoop was analyzing trace of length 91 with TraceHistMax 86, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 11 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 839.8s OverallTime, 87 OverallIterations, 86 TraceHistogramMax, 183.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 256 SDtfs, 93 SDslu, 86 SDs, 0 SdLazy, 234785 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 151.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3999 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 3914 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 150.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=86, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 86 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 475.8s SatisfiabilityAnalysisTime, 150.0s InterpolantComputationTime, 3999 NumberOfCodeBlocks, 3999 NumberOfCodeBlocksAsserted, 1031 NumberOfCheckSat, 3913 ConstructedInterpolants, 0 QuantifiedInterpolants, 2494471 SizeOfPredicates, 86 NumberOfNonLiveVariables, 19049 ConjunctsInSsa, 15136 ConjunctsInUnsatCore, 86 InterpolantComputations, 1 PerfectInterpolantSequences, 0/105995 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/Mult1-Safe.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_00-20-52-896.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Mult1-Safe.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_00-20-52-896.csv Completed graceful shutdown