java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:42:50,404 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:42:50,406 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:42:50,419 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:42:50,419 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:42:50,420 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:42:50,422 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:42:50,423 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:42:50,425 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:42:50,426 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:42:50,427 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-28 10:42:50,428 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-28 10:42:50,428 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-28 10:42:50,430 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-28 10:42:50,431 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-28 10:42:50,432 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-28 10:42:50,433 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-28 10:42:50,435 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-28 10:42:50,437 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-28 10:42:50,438 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-28 10:42:50,439 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-28 10:42:50,441 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-28 10:42:50,443 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-28 10:42:50,453 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-28 10:42:50,481 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:42:50,482 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:42:50,485 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:42:50,485 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:42:50,486 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:42:50,486 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:42:50,487 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:42:50,487 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:42:50,487 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:42:50,487 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:42:50,487 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:42:50,488 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:42:50,488 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:42:50,488 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:42:50,488 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:42:50,490 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:42:50,490 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:42:50,490 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:42:50,490 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:42:50,491 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:42:50,491 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:42:50,491 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:42:50,491 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:42:50,492 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:42:50,493 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:42:50,493 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:42:50,493 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:42:50,493 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:42:50,494 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:42:50,494 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:42:50,494 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-28 10:42:50,561 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:42:50,576 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:42:50,583 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:42:50,585 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:42:50,585 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:42:50,586 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl [2018-09-28 10:42:50,586 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl' [2018-09-28 10:42:50,638 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:42:50,642 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:42:50,642 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:42:50,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:42:50,643 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:42:50,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:50" (1/1) ... [2018-09-28 10:42:50,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:50" (1/1) ... [2018-09-28 10:42:50,685 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-28 10:42:50,685 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-28 10:42:50,685 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-28 10:42:50,688 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:42:50,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:42:50,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:42:50,689 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:42:50,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:50" (1/1) ... [2018-09-28 10:42:50,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:50" (1/1) ... [2018-09-28 10:42:50,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:50" (1/1) ... [2018-09-28 10:42:50,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:50" (1/1) ... [2018-09-28 10:42:50,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:50" (1/1) ... [2018-09-28 10:42:50,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:50" (1/1) ... [2018-09-28 10:42:50,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:50" (1/1) ... [2018-09-28 10:42:50,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:42:50,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:42:50,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:42:50,715 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:42:50,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:42:50,789 INFO L124 BoogieDeclarations]: Specification and implementation of procedure mult given in one single declaration [2018-09-28 10:42:50,789 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2018-09-28 10:42:50,790 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2018-09-28 10:42:50,854 WARN L650 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-09-28 10:42:50,934 INFO L350 CfgBuilder]: Using library mode [2018-09-28 10:42:50,935 INFO L202 PluginConnector]: Adding new model Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:42:50 BoogieIcfgContainer [2018-09-28 10:42:50,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:42:50,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:42:50,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:42:50,940 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:42:50,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:42:50" (1/2) ... [2018-09-28 10:42:50,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36fd41e and model type Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:42:50, skipping insertion in model container [2018-09-28 10:42:50,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:42:50" (2/2) ... [2018-09-28 10:42:50,943 INFO L112 eAbstractionObserver]: Analyzing ICFG Mult1-Safe.bpl [2018-09-28 10:42:50,953 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:42:50,960 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:42:51,011 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:42:51,012 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:42:51,012 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:42:51,013 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:42:51,013 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:42:51,013 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:42:51,013 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:42:51,013 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:42:51,014 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:42:51,029 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-28 10:42:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-28 10:42:51,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:51,045 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-28 10:42:51,046 INFO L423 AbstractCegarLoop]: === Iteration 1 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:42:51,053 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:51,053 INFO L82 PathProgramCache]: Analyzing trace with hash 924708, now seen corresponding path program 1 times [2018-09-28 10:42:51,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:51,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:51,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:51,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:51,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:51,128 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:42:51,128 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:42:51,128 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 [2018-09-28 10:42:51,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:51,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:51,325 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:42:51,325 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-28 10:42:51,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:42:51,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:42:51,343 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:51,345 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 5 states. [2018-09-28 10:42:51,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:51,698 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-28 10:42:51,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:42:51,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-28 10:42:51,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:51,711 INFO L225 Difference]: With dead ends: 10 [2018-09-28 10:42:51,711 INFO L226 Difference]: Without dead ends: 6 [2018-09-28 10:42:51,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:51,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-28 10:42:51,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-28 10:42:51,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-28 10:42:51,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-28 10:42:51,750 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-28 10:42:51,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:51,750 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-28 10:42:51,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:42:51,751 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-28 10:42:51,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:42:51,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:51,751 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-28 10:42:51,752 INFO L423 AbstractCegarLoop]: === Iteration 2 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:42:51,752 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:51,752 INFO L82 PathProgramCache]: Analyzing trace with hash 28663973, now seen corresponding path program 1 times [2018-09-28 10:42:51,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:51,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:51,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:51,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:51,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:51,758 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:42:51,758 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:42:51,758 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 [2018-09-28 10:42:51,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:51,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:51,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:42:51,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-09-28 10:42:51,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:42:51,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:42:51,985 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:51,985 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-28 10:42:52,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:52,318 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-28 10:42:52,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:42:52,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-28 10:42:52,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:52,324 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:42:52,324 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 10:42:52,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:52,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 10:42:52,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-28 10:42:52,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-28 10:42:52,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-28 10:42:52,329 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-28 10:42:52,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:52,330 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-28 10:42:52,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:42:52,330 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-28 10:42:52,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-28 10:42:52,330 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:52,331 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-28 10:42:52,331 INFO L423 AbstractCegarLoop]: === Iteration 3 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:42:52,331 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:52,332 INFO L82 PathProgramCache]: Analyzing trace with hash 888581188, now seen corresponding path program 2 times [2018-09-28 10:42:52,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:52,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:52,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:52,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:52,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:52,342 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:42:52,342 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:42:52,342 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 [2018-09-28 10:42:52,356 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:52,365 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:52,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:52,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:52,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:42:52,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-09-28 10:42:52,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:42:52,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:42:52,472 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:52,472 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-28 10:42:52,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:52,827 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-28 10:42:52,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:42:52,828 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-28 10:42:52,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:52,829 INFO L225 Difference]: With dead ends: 10 [2018-09-28 10:42:52,830 INFO L226 Difference]: Without dead ends: 8 [2018-09-28 10:42:52,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:52,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-28 10:42:52,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-28 10:42:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:42:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-28 10:42:52,834 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-28 10:42:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:52,834 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-28 10:42:52,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:42:52,835 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-28 10:42:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:42:52,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:52,835 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2018-09-28 10:42:52,836 INFO L423 AbstractCegarLoop]: === Iteration 4 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:42:52,836 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:52,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1776211077, now seen corresponding path program 3 times [2018-09-28 10:42:52,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:52,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:52,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:52,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:52,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:52,845 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:42:52,845 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:42:52,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:42:52,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:52,866 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-28 10:42:52,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:52,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:53,298 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:42:53,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-09-28 10:42:53,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:42:53,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:42:53,299 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:53,299 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-28 10:42:53,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:53,670 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:42:53,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:42:53,672 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-28 10:42:53,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:53,673 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:42:53,673 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 10:42:53,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:53,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 10:42:53,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-28 10:42:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-28 10:42:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-28 10:42:53,677 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-28 10:42:53,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:53,678 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-28 10:42:53,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:42:53,678 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-28 10:42:53,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:42:53,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:53,679 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2018-09-28 10:42:53,679 INFO L423 AbstractCegarLoop]: === Iteration 5 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:42:53,679 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:53,679 INFO L82 PathProgramCache]: Analyzing trace with hash -772033436, now seen corresponding path program 4 times [2018-09-28 10:42:53,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:53,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:53,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:53,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:53,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:53,688 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:42:53,688 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:42:53,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:42:53,698 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:53,710 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:53,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:53,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:53,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:42:53,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-09-28 10:42:53,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:42:53,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:42:53,825 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:53,826 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-28 10:42:54,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:54,156 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-28 10:42:54,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:42:54,157 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-28 10:42:54,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:54,158 INFO L225 Difference]: With dead ends: 12 [2018-09-28 10:42:54,158 INFO L226 Difference]: Without dead ends: 10 [2018-09-28 10:42:54,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:54,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-28 10:42:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-28 10:42:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:42:54,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-28 10:42:54,162 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-28 10:42:54,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:54,162 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-28 10:42:54,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:42:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-28 10:42:54,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:42:54,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:54,163 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1] [2018-09-28 10:42:54,163 INFO L423 AbstractCegarLoop]: === Iteration 6 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:42:54,164 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:54,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1836765285, now seen corresponding path program 5 times [2018-09-28 10:42:54,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:54,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:54,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:54,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:54,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:54,173 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:42:54,173 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:42:54,173 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 [2018-09-28 10:42:54,182 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:54,197 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-28 10:42:54,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:54,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:54,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:42:54,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-09-28 10:42:54,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:42:54,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:42:54,362 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:54,363 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-28 10:42:54,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:54,730 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-28 10:42:54,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:42:54,732 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-28 10:42:54,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:54,732 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:42:54,733 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 10:42:54,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:54,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 10:42:54,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-28 10:42:54,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 10:42:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-28 10:42:54,737 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-28 10:42:54,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:54,737 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-28 10:42:54,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:42:54,737 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-28 10:42:54,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 10:42:54,738 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:54,738 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2018-09-28 10:42:54,738 INFO L423 AbstractCegarLoop]: === Iteration 7 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:42:54,739 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:54,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1105147012, now seen corresponding path program 6 times [2018-09-28 10:42:54,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:54,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:54,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:54,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:54,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:54,749 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:42:54,749 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:42:54,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:42:54,763 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:42:54,775 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-28 10:42:54,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:54,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:54,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:42:54,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-09-28 10:42:54,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:42:54,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:42:54,941 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:54,941 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-28 10:42:55,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:55,345 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-28 10:42:55,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:42:55,345 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-28 10:42:55,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:55,346 INFO L225 Difference]: With dead ends: 14 [2018-09-28 10:42:55,347 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 10:42:55,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:55,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 10:42:55,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-28 10:42:55,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:42:55,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-28 10:42:55,351 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-28 10:42:55,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:55,351 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-28 10:42:55,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:42:55,351 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-28 10:42:55,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:42:55,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:55,352 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1] [2018-09-28 10:42:55,352 INFO L423 AbstractCegarLoop]: === Iteration 8 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:42:55,353 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:55,353 INFO L82 PathProgramCache]: Analyzing trace with hash -100182971, now seen corresponding path program 7 times [2018-09-28 10:42:55,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:55,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:55,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:55,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:55,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:55,363 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:42:55,364 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:42:55,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:42:55,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:42:55,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:55,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:42:55,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-09-28 10:42:55,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:42:55,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:42:55,558 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:55,558 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-28 10:42:56,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:56,206 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-28 10:42:56,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:42:56,207 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-28 10:42:56,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:56,208 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:42:56,208 INFO L226 Difference]: Without dead ends: 13 [2018-09-28 10:42:56,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:56,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-28 10:42:56,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-28 10:42:56,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-28 10:42:56,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-28 10:42:56,214 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-28 10:42:56,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:56,214 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-28 10:42:56,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:42:56,214 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-28 10:42:56,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 10:42:56,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:56,215 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2018-09-28 10:42:56,215 INFO L423 AbstractCegarLoop]: === Iteration 9 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:42:56,215 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:56,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1189293220, now seen corresponding path program 8 times [2018-09-28 10:42:56,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:56,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:56,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:56,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:42:56,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:56,227 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:42:56,227 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:42:56,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:42:56,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:42:56,264 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:42:56,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:56,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:56,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:42:56,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-09-28 10:42:56,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:42:56,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:42:56,589 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:56,589 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-28 10:42:57,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:57,231 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-28 10:42:57,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:42:57,232 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-28 10:42:57,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:57,233 INFO L225 Difference]: With dead ends: 16 [2018-09-28 10:42:57,233 INFO L226 Difference]: Without dead ends: 14 [2018-09-28 10:42:57,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:57,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-28 10:42:57,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-28 10:42:57,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:42:57,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-28 10:42:57,238 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-28 10:42:57,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:57,238 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-28 10:42:57,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:42:57,239 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-28 10:42:57,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:42:57,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:57,239 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1] [2018-09-28 10:42:57,240 INFO L423 AbstractCegarLoop]: === Iteration 10 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:42:57,240 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:57,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1786617819, now seen corresponding path program 9 times [2018-09-28 10:42:57,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:57,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:57,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:57,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:57,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:57,251 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:42:57,252 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:42:57,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:42:57,269 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:42:57,292 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:42:57,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:57,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:57,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:42:57,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-09-28 10:42:57,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 10:42:57,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 10:42:57,590 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:57,590 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-28 10:42:58,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:58,376 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-28 10:42:58,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:42:58,377 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-28 10:42:58,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:58,378 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:42:58,378 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 10:42:58,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 10:42:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-28 10:42:58,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-28 10:42:58,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-28 10:42:58,383 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-28 10:42:58,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:58,383 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-28 10:42:58,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 10:42:58,383 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-28 10:42:58,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 10:42:58,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:58,384 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2018-09-28 10:42:58,384 INFO L423 AbstractCegarLoop]: === Iteration 11 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:42:58,384 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:58,384 INFO L82 PathProgramCache]: Analyzing trace with hash 449420484, now seen corresponding path program 10 times [2018-09-28 10:42:58,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:58,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:58,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:58,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:58,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:58,397 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:42:58,397 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:42:58,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:42:58,406 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:42:58,434 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:42:58,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:58,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:58,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:42:58,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-09-28 10:42:58,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:42:58,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:42:58,723 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:58,723 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-28 10:42:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:42:59,471 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-28 10:42:59,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:42:59,471 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-28 10:42:59,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:42:59,473 INFO L225 Difference]: With dead ends: 18 [2018-09-28 10:42:59,473 INFO L226 Difference]: Without dead ends: 16 [2018-09-28 10:42:59,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:42:59,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-28 10:42:59,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-28 10:42:59,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:42:59,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-28 10:42:59,477 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-28 10:42:59,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:42:59,477 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-28 10:42:59,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:42:59,478 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-28 10:42:59,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:42:59,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:42:59,478 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1] [2018-09-28 10:42:59,479 INFO L423 AbstractCegarLoop]: === Iteration 12 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:42:59,479 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:42:59,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1047131141, now seen corresponding path program 11 times [2018-09-28 10:42:59,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:42:59,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:42:59,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:59,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:42:59,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:42:59,492 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:42:59,492 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:42:59,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:42:59,503 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:42:59,550 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:42:59,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:42:59,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:42:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:42:59,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:42:59,812 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-09-28 10:42:59,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 10:42:59,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 10:42:59,812 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:42:59,813 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-28 10:43:00,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:00,779 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-28 10:43:00,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:43:00,779 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-28 10:43:00,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:00,780 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:43:00,780 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:43:00,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:00,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:43:00,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-28 10:43:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-28 10:43:00,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-28 10:43:00,787 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-28 10:43:00,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:00,787 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-28 10:43:00,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 10:43:00,787 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-28 10:43:00,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-28 10:43:00,788 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:00,788 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1] [2018-09-28 10:43:00,788 INFO L423 AbstractCegarLoop]: === Iteration 13 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:43:00,788 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:00,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1898674972, now seen corresponding path program 12 times [2018-09-28 10:43:00,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:00,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:00,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:00,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:00,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:00,799 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:43:00,799 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:43:00,799 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 [2018-09-28 10:43:00,817 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:00,872 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:43:00,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:00,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:01,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:43:01,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-09-28 10:43:01,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:43:01,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:43:01,236 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:01,236 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-28 10:43:02,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:02,422 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-28 10:43:02,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:43:02,422 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-28 10:43:02,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:02,423 INFO L225 Difference]: With dead ends: 20 [2018-09-28 10:43:02,423 INFO L226 Difference]: Without dead ends: 18 [2018-09-28 10:43:02,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:02,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-28 10:43:02,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-28 10:43:02,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:43:02,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-28 10:43:02,429 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-28 10:43:02,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:02,430 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-28 10:43:02,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:43:02,430 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-28 10:43:02,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:43:02,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:02,431 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1] [2018-09-28 10:43:02,431 INFO L423 AbstractCegarLoop]: === Iteration 14 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:43:02,431 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:02,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1270616037, now seen corresponding path program 13 times [2018-09-28 10:43:02,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:02,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:02,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:02,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:02,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:02,443 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:43:02,443 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:43:02,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:43:02,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:02,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:02,864 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:43:02,865 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-09-28 10:43:02,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:43:02,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:43:02,865 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:02,866 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-28 10:43:04,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:04,687 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-28 10:43:04,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:43:04,688 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-28 10:43:04,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:04,689 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:43:04,689 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:43:04,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:04,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:43:04,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-28 10:43:04,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 10:43:04,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-28 10:43:04,694 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-28 10:43:04,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:04,694 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-28 10:43:04,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:43:04,694 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-28 10:43:04,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 10:43:04,695 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:04,695 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1] [2018-09-28 10:43:04,695 INFO L423 AbstractCegarLoop]: === Iteration 15 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:43:04,695 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:04,695 INFO L82 PathProgramCache]: Analyzing trace with hash 734389508, now seen corresponding path program 14 times [2018-09-28 10:43:04,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:04,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:04,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:04,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:04,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:04,705 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:43:04,706 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:43:04,706 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 [2018-09-28 10:43:04,726 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:04,781 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:04,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:04,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:05,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:43:05,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-09-28 10:43:05,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:43:05,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:43:05,392 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:05,392 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-28 10:43:06,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:06,701 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-28 10:43:06,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:43:06,701 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-28 10:43:06,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:06,701 INFO L225 Difference]: With dead ends: 22 [2018-09-28 10:43:06,702 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:43:06,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:06,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:43:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-28 10:43:06,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:43:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-28 10:43:06,706 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-28 10:43:06,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:06,706 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-28 10:43:06,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:43:06,706 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-28 10:43:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:43:06,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:06,707 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1] [2018-09-28 10:43:06,707 INFO L423 AbstractCegarLoop]: === Iteration 16 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:43:06,708 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:06,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1291236293, now seen corresponding path program 15 times [2018-09-28 10:43:06,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:06,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:06,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:06,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:06,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:06,717 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:43:06,717 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:43:06,718 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 [2018-09-28 10:43:06,732 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:06,835 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:43:06,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:06,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:08,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:43:08,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-09-28 10:43:08,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 10:43:08,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 10:43:08,188 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:08,188 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-28 10:43:09,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:09,700 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-28 10:43:09,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:43:09,700 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-28 10:43:09,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:09,701 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:43:09,701 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:43:09,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:09,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:43:09,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-28 10:43:09,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-28 10:43:09,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-28 10:43:09,707 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-28 10:43:09,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:09,707 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-28 10:43:09,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 10:43:09,707 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-28 10:43:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 10:43:09,708 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:09,708 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1] [2018-09-28 10:43:09,708 INFO L423 AbstractCegarLoop]: === Iteration 17 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:43:09,708 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:09,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1373617444, now seen corresponding path program 16 times [2018-09-28 10:43:09,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:09,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:09,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:09,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:09,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:09,720 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:43:09,720 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:43:09,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:43:09,741 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:09,820 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:09,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:09,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:10,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:43:10,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-09-28 10:43:10,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:43:10,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:43:10,177 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:10,177 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-28 10:43:11,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:11,957 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-28 10:43:11,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:43:11,957 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-28 10:43:11,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:11,958 INFO L225 Difference]: With dead ends: 24 [2018-09-28 10:43:11,958 INFO L226 Difference]: Without dead ends: 22 [2018-09-28 10:43:11,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:11,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-28 10:43:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-28 10:43:11,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:43:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-28 10:43:11,964 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-28 10:43:11,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:11,964 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-28 10:43:11,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:43:11,964 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-28 10:43:11,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-28 10:43:11,965 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:11,965 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1] [2018-09-28 10:43:11,965 INFO L423 AbstractCegarLoop]: === Iteration 18 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:43:11,965 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:11,965 INFO L82 PathProgramCache]: Analyzing trace with hash -367534171, now seen corresponding path program 17 times [2018-09-28 10:43:11,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:11,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:11,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:11,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:11,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:11,975 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:43:11,975 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:43:11,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:43:11,987 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:12,086 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-28 10:43:12,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:12,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:12,442 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:12,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:43:12,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-09-28 10:43:12,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 10:43:12,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 10:43:12,463 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:12,463 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-28 10:43:14,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:14,201 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-28 10:43:14,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:43:14,202 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-28 10:43:14,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:14,203 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:43:14,203 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:43:14,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:14,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:43:14,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-28 10:43:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 10:43:14,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-28 10:43:14,208 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-28 10:43:14,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:14,209 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-28 10:43:14,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 10:43:14,209 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-28 10:43:14,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 10:43:14,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:14,210 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1] [2018-09-28 10:43:14,210 INFO L423 AbstractCegarLoop]: === Iteration 19 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:43:14,210 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:14,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1491340612, now seen corresponding path program 18 times [2018-09-28 10:43:14,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:14,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:14,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:14,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:14,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:14,219 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:43:14,219 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:43:14,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:43:14,232 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:43:14,344 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-28 10:43:14,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:14,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:14,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:43:14,802 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-09-28 10:43:14,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:43:14,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:43:14,803 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:14,803 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-28 10:43:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:16,637 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-28 10:43:16,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:43:16,638 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-28 10:43:16,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:16,639 INFO L225 Difference]: With dead ends: 26 [2018-09-28 10:43:16,639 INFO L226 Difference]: Without dead ends: 24 [2018-09-28 10:43:16,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:16,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-28 10:43:16,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-28 10:43:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:43:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-28 10:43:16,644 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-28 10:43:16,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:16,644 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-28 10:43:16,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:43:16,644 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-28 10:43:16,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-28 10:43:16,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:16,645 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1] [2018-09-28 10:43:16,645 INFO L423 AbstractCegarLoop]: === Iteration 20 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:43:16,645 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:16,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1013083259, now seen corresponding path program 19 times [2018-09-28 10:43:16,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:16,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:16,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:16,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:16,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:16,654 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:43:16,654 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:43:16,655 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 [2018-09-28 10:43:16,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:16,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:17,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:43:17,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-09-28 10:43:17,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:43:17,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:43:17,350 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:17,350 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-28 10:43:19,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:19,519 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-28 10:43:19,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:43:19,520 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-28 10:43:19,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:19,521 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:43:19,521 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:43:19,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:19,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:43:19,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-28 10:43:19,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-28 10:43:19,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-28 10:43:19,526 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-28 10:43:19,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:19,526 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-28 10:43:19,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:43:19,526 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-28 10:43:19,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-28 10:43:19,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:19,527 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1] [2018-09-28 10:43:19,527 INFO L423 AbstractCegarLoop]: === Iteration 21 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:43:19,527 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:19,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1340811932, now seen corresponding path program 20 times [2018-09-28 10:43:19,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:19,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:19,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:19,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:19,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:19,536 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:43:19,536 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:43:19,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:43:19,558 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:19,717 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:19,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:19,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:20,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:43:20,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-09-28 10:43:20,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:43:20,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:43:20,260 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:20,261 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-28 10:43:22,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:22,506 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-28 10:43:22,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:43:22,507 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-28 10:43:22,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:22,507 INFO L225 Difference]: With dead ends: 28 [2018-09-28 10:43:22,507 INFO L226 Difference]: Without dead ends: 26 [2018-09-28 10:43:22,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:22,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-28 10:43:22,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-28 10:43:22,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:43:22,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-28 10:43:22,513 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-28 10:43:22,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:22,513 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-28 10:43:22,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:43:22,514 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-28 10:43:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-28 10:43:22,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:22,514 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1] [2018-09-28 10:43:22,514 INFO L423 AbstractCegarLoop]: === Iteration 22 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:43:22,515 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:22,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1384501093, now seen corresponding path program 21 times [2018-09-28 10:43:22,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:22,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:22,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:22,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:22,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:22,523 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:43:22,523 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:43:22,523 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 [2018-09-28 10:43:22,536 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:22,715 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-28 10:43:22,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:22,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:23,779 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:43:23,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-09-28 10:43:23,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-28 10:43:23,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-28 10:43:23,780 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:23,780 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-28 10:43:26,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:26,347 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-28 10:43:26,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:43:26,350 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-28 10:43:26,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:26,350 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:43:26,350 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:43:26,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:26,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:43:26,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-28 10:43:26,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-28 10:43:26,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-28 10:43:26,355 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-28 10:43:26,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:26,355 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-28 10:43:26,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-28 10:43:26,355 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-28 10:43:26,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:43:26,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:26,356 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2018-09-28 10:43:26,356 INFO L423 AbstractCegarLoop]: === Iteration 23 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:43:26,356 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:26,356 INFO L82 PathProgramCache]: Analyzing trace with hash -30141052, now seen corresponding path program 22 times [2018-09-28 10:43:26,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:26,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:26,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:26,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:26,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:26,365 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:43:26,365 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:43:26,365 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 [2018-09-28 10:43:26,381 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:26,574 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:26,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:26,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:27,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:43:27,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-09-28 10:43:27,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:43:27,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:43:27,480 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:27,480 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-28 10:43:30,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:30,114 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-28 10:43:30,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:43:30,115 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-28 10:43:30,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:30,116 INFO L225 Difference]: With dead ends: 30 [2018-09-28 10:43:30,116 INFO L226 Difference]: Without dead ends: 28 [2018-09-28 10:43:30,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:30,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-28 10:43:30,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-28 10:43:30,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:43:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-28 10:43:30,121 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-28 10:43:30,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:30,121 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-28 10:43:30,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:43:30,122 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-28 10:43:30,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-28 10:43:30,122 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:30,122 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1] [2018-09-28 10:43:30,122 INFO L423 AbstractCegarLoop]: === Iteration 24 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:43:30,123 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:30,123 INFO L82 PathProgramCache]: Analyzing trace with hash -934374587, now seen corresponding path program 23 times [2018-09-28 10:43:30,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:30,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:30,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:30,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:30,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:30,130 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:43:30,131 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:43:30,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:43:30,139 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:30,385 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-28 10:43:30,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:30,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:30,909 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:30,929 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:43:30,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-09-28 10:43:30,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-28 10:43:30,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-28 10:43:30,930 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:30,930 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-28 10:43:33,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:33,691 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-28 10:43:33,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:43:33,691 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-28 10:43:33,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:33,692 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:43:33,692 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:43:33,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:33,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:43:33,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-28 10:43:33,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-28 10:43:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-28 10:43:33,698 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-28 10:43:33,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:33,698 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-28 10:43:33,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-28 10:43:33,698 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-28 10:43:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-28 10:43:33,699 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:33,699 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1] [2018-09-28 10:43:33,699 INFO L423 AbstractCegarLoop]: === Iteration 25 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:43:33,699 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:33,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1099156900, now seen corresponding path program 24 times [2018-09-28 10:43:33,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:33,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:33,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:33,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:33,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:33,707 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:43:33,707 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:43:33,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-09-28 10:43:33,721 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:43:33,992 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-28 10:43:33,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:33,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:34,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:43:34,632 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-09-28 10:43:34,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:43:34,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:43:34,632 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:34,632 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-28 10:43:37,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:37,641 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-28 10:43:37,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:43:37,642 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-28 10:43:37,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:37,643 INFO L225 Difference]: With dead ends: 32 [2018-09-28 10:43:37,643 INFO L226 Difference]: Without dead ends: 30 [2018-09-28 10:43:37,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:37,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-28 10:43:37,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-28 10:43:37,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:43:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-28 10:43:37,647 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-28 10:43:37,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:37,647 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-28 10:43:37,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:43:37,648 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-28 10:43:37,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-28 10:43:37,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:37,648 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1] [2018-09-28 10:43:37,649 INFO L423 AbstractCegarLoop]: === Iteration 26 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:43:37,649 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:37,649 INFO L82 PathProgramCache]: Analyzing trace with hash -285876443, now seen corresponding path program 25 times [2018-09-28 10:43:37,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:37,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:37,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:37,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:37,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:37,656 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:43:37,657 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:43:37,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:43:37,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:43:38,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:38,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:43:38,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-09-28 10:43:38,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:43:38,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:43:38,702 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:38,702 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-28 10:43:41,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:41,890 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-28 10:43:41,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:43:41,891 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-28 10:43:41,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:41,891 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:43:41,892 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:43:41,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:41,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:43:41,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-28 10:43:41,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 10:43:41,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-28 10:43:41,898 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-28 10:43:41,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:41,899 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-28 10:43:41,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:43:41,899 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-28 10:43:41,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 10:43:41,900 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:41,900 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1] [2018-09-28 10:43:41,900 INFO L423 AbstractCegarLoop]: === Iteration 27 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:43:41,900 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:41,900 INFO L82 PathProgramCache]: Analyzing trace with hash -272237116, now seen corresponding path program 26 times [2018-09-28 10:43:41,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:41,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:41,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:41,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:43:41,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:41,908 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:43:41,909 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:43:41,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:43:41,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:43:42,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:43:42,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:42,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:43,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:43:43,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-09-28 10:43:43,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:43:43,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:43:43,660 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:43,660 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-28 10:43:47,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:47,061 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-28 10:43:47,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:43:47,061 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-28 10:43:47,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:47,062 INFO L225 Difference]: With dead ends: 34 [2018-09-28 10:43:47,062 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:43:47,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:47,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:43:47,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-28 10:43:47,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:43:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-28 10:43:47,068 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-28 10:43:47,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:47,069 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-28 10:43:47,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:43:47,069 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-28 10:43:47,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-28 10:43:47,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:47,070 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1] [2018-09-28 10:43:47,070 INFO L423 AbstractCegarLoop]: === Iteration 28 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:43:47,070 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:47,070 INFO L82 PathProgramCache]: Analyzing trace with hash 150582021, now seen corresponding path program 27 times [2018-09-28 10:43:47,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:47,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:47,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:47,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:47,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:47,085 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:43:47,085 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:43:47,085 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 [2018-09-28 10:43:47,097 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:43:47,538 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-28 10:43:47,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:47,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:48,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:43:48,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-09-28 10:43:48,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-28 10:43:48,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-28 10:43:48,453 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:48,453 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-28 10:43:52,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:52,075 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-28 10:43:52,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:43:52,076 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-28 10:43:52,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:52,077 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:43:52,077 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:43:52,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:52,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:43:52,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-28 10:43:52,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-28 10:43:52,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-28 10:43:52,083 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-28 10:43:52,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:52,084 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-28 10:43:52,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-28 10:43:52,084 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-28 10:43:52,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 10:43:52,085 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:52,085 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1] [2018-09-28 10:43:52,085 INFO L423 AbstractCegarLoop]: === Iteration 29 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:43:52,085 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:52,085 INFO L82 PathProgramCache]: Analyzing trace with hash 373073380, now seen corresponding path program 28 times [2018-09-28 10:43:52,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:52,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:52,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:52,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:52,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:52,092 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:43:52,092 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:43:52,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:43:52,115 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:43:52,636 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:43:52,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:52,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:53,871 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:43:53,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-09-28 10:43:53,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:43:53,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:43:53,872 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:53,872 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-28 10:43:57,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:43:57,740 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-28 10:43:57,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:43:57,741 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-28 10:43:57,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:43:57,741 INFO L225 Difference]: With dead ends: 36 [2018-09-28 10:43:57,742 INFO L226 Difference]: Without dead ends: 34 [2018-09-28 10:43:57,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:43:57,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-28 10:43:57,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-28 10:43:57,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:43:57,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-28 10:43:57,747 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-28 10:43:57,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:43:57,747 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-28 10:43:57,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:43:57,747 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-28 10:43:57,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 10:43:57,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:43:57,748 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1] [2018-09-28 10:43:57,748 INFO L423 AbstractCegarLoop]: === Iteration 30 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:43:57,748 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:43:57,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1319629083, now seen corresponding path program 29 times [2018-09-28 10:43:57,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:43:57,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:43:57,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:57,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:43:57,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:43:57,755 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:43:57,756 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:43:57,756 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 [2018-09-28 10:43:57,767 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:43:58,271 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-28 10:43:58,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:43:58,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:43:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:43:59,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:43:59,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-09-28 10:43:59,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-28 10:43:59,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-28 10:43:59,358 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:43:59,359 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-28 10:44:03,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:03,489 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-28 10:44:03,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:44:03,490 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-28 10:44:03,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:03,491 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:44:03,491 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:44:03,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:03,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:44:03,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-28 10:44:03,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-28 10:44:03,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-28 10:44:03,495 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-28 10:44:03,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:03,496 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-28 10:44:03,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-28 10:44:03,496 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-28 10:44:03,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 10:44:03,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:03,497 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1] [2018-09-28 10:44:03,497 INFO L423 AbstractCegarLoop]: === Iteration 31 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:44:03,497 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:03,497 INFO L82 PathProgramCache]: Analyzing trace with hash 2041169412, now seen corresponding path program 30 times [2018-09-28 10:44:03,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:03,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:03,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:03,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:03,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:03,504 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:44:03,505 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:44:03,505 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 [2018-09-28 10:44:03,524 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:44:04,069 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-28 10:44:04,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:04,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:05,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:44:05,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-09-28 10:44:05,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:44:05,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:44:05,195 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:05,196 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-28 10:44:09,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:09,589 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-28 10:44:09,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:44:09,590 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-28 10:44:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:09,590 INFO L225 Difference]: With dead ends: 38 [2018-09-28 10:44:09,591 INFO L226 Difference]: Without dead ends: 36 [2018-09-28 10:44:09,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:09,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-28 10:44:09,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-28 10:44:09,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-28 10:44:09,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-28 10:44:09,596 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-28 10:44:09,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:09,596 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-28 10:44:09,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:44:09,597 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-28 10:44:09,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-28 10:44:09,597 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:09,597 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1] [2018-09-28 10:44:09,597 INFO L423 AbstractCegarLoop]: === Iteration 32 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:44:09,598 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:09,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1148259643, now seen corresponding path program 31 times [2018-09-28 10:44:09,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:09,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:09,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:09,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:09,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:09,605 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:44:09,605 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:44:09,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:44:09,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:44:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:10,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:11,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:44:11,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-09-28 10:44:11,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:44:11,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:44:11,704 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:11,704 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-28 10:44:16,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:16,370 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-28 10:44:16,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:44:16,370 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-28 10:44:16,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:16,371 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:44:16,371 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:44:16,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:16,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:44:16,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-28 10:44:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 10:44:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-28 10:44:16,376 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-28 10:44:16,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:16,376 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-28 10:44:16,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:44:16,377 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-28 10:44:16,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-28 10:44:16,377 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:16,377 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1] [2018-09-28 10:44:16,377 INFO L423 AbstractCegarLoop]: === Iteration 33 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:44:16,378 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:16,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1236312540, now seen corresponding path program 32 times [2018-09-28 10:44:16,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:16,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:16,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:16,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:44:16,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:16,385 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:44:16,385 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:44:16,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:44:16,399 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:44:17,082 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:44:17,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:17,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:18,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:44:18,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-09-28 10:44:18,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:44:18,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:44:18,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:18,319 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-28 10:44:23,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:23,263 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-28 10:44:23,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:44:23,263 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-28 10:44:23,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:23,264 INFO L225 Difference]: With dead ends: 40 [2018-09-28 10:44:23,264 INFO L226 Difference]: Without dead ends: 38 [2018-09-28 10:44:23,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:23,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-28 10:44:23,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-28 10:44:23,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-28 10:44:23,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-28 10:44:23,269 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-28 10:44:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:23,269 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-28 10:44:23,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:44:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-28 10:44:23,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-28 10:44:23,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:23,270 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1] [2018-09-28 10:44:23,270 INFO L423 AbstractCegarLoop]: === Iteration 34 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:44:23,270 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:23,270 INFO L82 PathProgramCache]: Analyzing trace with hash 329014949, now seen corresponding path program 33 times [2018-09-28 10:44:23,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:23,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:23,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:23,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:23,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:23,278 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:44:23,278 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:44:23,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:44:23,292 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:44:23,997 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-28 10:44:23,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:24,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:24,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:44:24,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-09-28 10:44:24,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-28 10:44:24,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-28 10:44:24,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:24,994 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-28 10:44:30,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:30,262 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-28 10:44:30,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:44:30,263 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-28 10:44:30,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:30,263 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:44:30,263 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:44:30,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:30,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:44:30,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-28 10:44:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-28 10:44:30,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-28 10:44:30,267 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-28 10:44:30,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:30,267 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-28 10:44:30,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-28 10:44:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-28 10:44:30,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:44:30,268 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:30,268 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1] [2018-09-28 10:44:30,269 INFO L423 AbstractCegarLoop]: === Iteration 35 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:44:30,269 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:30,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1609526852, now seen corresponding path program 34 times [2018-09-28 10:44:30,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:30,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:30,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:30,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:30,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:30,279 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:44:30,279 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:44:30,279 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 [2018-09-28 10:44:30,291 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:44:31,039 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:44:31,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:31,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:32,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:44:32,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-09-28 10:44:32,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:44:32,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:44:32,107 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:32,107 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-28 10:44:37,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:37,620 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-28 10:44:37,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:44:37,621 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-28 10:44:37,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:37,622 INFO L225 Difference]: With dead ends: 42 [2018-09-28 10:44:37,622 INFO L226 Difference]: Without dead ends: 40 [2018-09-28 10:44:37,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:37,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-28 10:44:37,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-28 10:44:37,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-28 10:44:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-28 10:44:37,627 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-28 10:44:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:37,628 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-28 10:44:37,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:44:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-28 10:44:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-28 10:44:37,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:37,628 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1] [2018-09-28 10:44:37,629 INFO L423 AbstractCegarLoop]: === Iteration 36 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:44:37,629 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:37,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1644277115, now seen corresponding path program 35 times [2018-09-28 10:44:37,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:37,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:37,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:37,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:37,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:37,635 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:44:37,635 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:44:37,635 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 [2018-09-28 10:44:37,648 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:44:38,610 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-28 10:44:38,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:38,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:39,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:44:39,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-09-28 10:44:39,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-28 10:44:39,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-28 10:44:39,713 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:39,713 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-28 10:44:45,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:45,533 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-28 10:44:45,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:44:45,534 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-28 10:44:45,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:45,535 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:44:45,535 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:44:45,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:45,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:44:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-28 10:44:45,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-28 10:44:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-28 10:44:45,540 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-28 10:44:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:45,541 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-28 10:44:45,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-28 10:44:45,541 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-28 10:44:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-28 10:44:45,541 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:45,541 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1] [2018-09-28 10:44:45,542 INFO L423 AbstractCegarLoop]: === Iteration 37 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:44:45,542 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:45,542 INFO L82 PathProgramCache]: Analyzing trace with hash 567015012, now seen corresponding path program 36 times [2018-09-28 10:44:45,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:45,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:45,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:45,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:45,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:45,549 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:44:45,549 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:44:45,549 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 [2018-09-28 10:44:45,563 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:44:46,307 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-28 10:44:46,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:44:46,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:47,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:44:47,482 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-09-28 10:44:47,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:44:47,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:44:47,483 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:47,483 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-28 10:44:53,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:44:53,615 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-28 10:44:53,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:44:53,616 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-28 10:44:53,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:44:53,616 INFO L225 Difference]: With dead ends: 44 [2018-09-28 10:44:53,616 INFO L226 Difference]: Without dead ends: 42 [2018-09-28 10:44:53,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:44:53,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-28 10:44:53,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-28 10:44:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-28 10:44:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-28 10:44:53,620 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-28 10:44:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:44:53,620 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-28 10:44:53,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:44:53,620 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-28 10:44:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-28 10:44:53,621 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:44:53,621 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1] [2018-09-28 10:44:53,621 INFO L423 AbstractCegarLoop]: === Iteration 38 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:44:53,621 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:44:53,622 INFO L82 PathProgramCache]: Analyzing trace with hash 397594213, now seen corresponding path program 37 times [2018-09-28 10:44:53,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:44:53,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:44:53,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:53,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:44:53,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:44:53,629 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:44:53,629 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:44:53,629 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 [2018-09-28 10:44:53,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:44:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:44:54,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:44:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:44:56,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:44:56,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-09-28 10:44:56,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:44:56,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:44:56,162 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:44:56,162 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-28 10:45:02,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:02,638 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-28 10:45:02,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:45:02,639 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-28 10:45:02,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:02,639 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:45:02,640 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:45:02,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:02,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:45:02,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-28 10:45:02,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 10:45:02,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-28 10:45:02,644 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-28 10:45:02,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:02,644 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-28 10:45:02,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:45:02,644 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-28 10:45:02,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-28 10:45:02,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:02,645 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1] [2018-09-28 10:45:02,645 INFO L423 AbstractCegarLoop]: === Iteration 39 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:45:02,645 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:02,645 INFO L82 PathProgramCache]: Analyzing trace with hash -559483260, now seen corresponding path program 38 times [2018-09-28 10:45:02,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:02,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:02,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:02,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:45:02,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:02,652 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:45:02,652 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:45:02,653 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 [2018-09-28 10:45:02,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:45:03,963 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:45:03,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:45:03,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:05,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:45:05,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-09-28 10:45:05,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-28 10:45:05,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-28 10:45:05,275 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:05,275 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-28 10:45:12,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:12,077 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-28 10:45:12,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-28 10:45:12,077 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-28 10:45:12,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:12,078 INFO L225 Difference]: With dead ends: 46 [2018-09-28 10:45:12,078 INFO L226 Difference]: Without dead ends: 44 [2018-09-28 10:45:12,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:12,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-28 10:45:12,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-28 10:45:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-28 10:45:12,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-28 10:45:12,082 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-28 10:45:12,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:12,083 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-28 10:45:12,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-28 10:45:12,083 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-28 10:45:12,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-28 10:45:12,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:12,083 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1] [2018-09-28 10:45:12,083 INFO L423 AbstractCegarLoop]: === Iteration 40 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:45:12,083 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:12,084 INFO L82 PathProgramCache]: Analyzing trace with hash -164113851, now seen corresponding path program 39 times [2018-09-28 10:45:12,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:12,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:12,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:12,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:12,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:12,092 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:45:12,092 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:45:12,092 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 [2018-09-28 10:45:12,104 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:45:13,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-28 10:45:13,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:45:13,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:14,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:45:14,478 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-09-28 10:45:14,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-28 10:45:14,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-28 10:45:14,478 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:14,478 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-28 10:45:21,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:21,570 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-28 10:45:21,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:45:21,570 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-28 10:45:21,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:21,571 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:45:21,571 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:45:21,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:21,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:45:21,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-28 10:45:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-28 10:45:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-28 10:45:21,577 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-28 10:45:21,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:21,577 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-28 10:45:21,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-28 10:45:21,577 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-28 10:45:21,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-28 10:45:21,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:21,578 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1] [2018-09-28 10:45:21,578 INFO L423 AbstractCegarLoop]: === Iteration 41 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:45:21,578 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:21,578 INFO L82 PathProgramCache]: Analyzing trace with hash -792564060, now seen corresponding path program 40 times [2018-09-28 10:45:21,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:21,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:21,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:21,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:21,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:21,584 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:45:21,584 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:45:21,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:45:21,602 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:45:22,988 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:45:22,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:45:22,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:24,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:45:24,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-09-28 10:45:24,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:45:24,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:45:24,385 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:24,385 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-28 10:45:31,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:31,841 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-28 10:45:31,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-28 10:45:31,841 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-28 10:45:31,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:31,842 INFO L225 Difference]: With dead ends: 48 [2018-09-28 10:45:31,842 INFO L226 Difference]: Without dead ends: 46 [2018-09-28 10:45:31,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:31,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-28 10:45:31,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-28 10:45:31,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-28 10:45:31,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-28 10:45:31,847 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-28 10:45:31,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:31,847 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-28 10:45:31,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:45:31,847 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-28 10:45:31,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-28 10:45:31,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:31,848 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1] [2018-09-28 10:45:31,848 INFO L423 AbstractCegarLoop]: === Iteration 42 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:45:31,848 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:31,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1200315941, now seen corresponding path program 41 times [2018-09-28 10:45:31,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:31,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:31,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:31,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:31,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:31,855 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:45:31,855 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:45:31,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:45:31,863 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:45:33,378 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-28 10:45:33,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:45:33,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:34,856 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:45:34,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-09-28 10:45:34,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-28 10:45:34,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-28 10:45:34,857 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:34,857 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-28 10:45:42,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:42,634 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-28 10:45:42,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 10:45:42,635 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-28 10:45:42,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:42,636 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:45:42,636 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:45:42,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:42,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:45:42,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-28 10:45:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-28 10:45:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-28 10:45:42,640 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-28 10:45:42,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:42,641 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-28 10:45:42,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-28 10:45:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-28 10:45:42,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-28 10:45:42,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:42,641 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1] [2018-09-28 10:45:42,641 INFO L423 AbstractCegarLoop]: === Iteration 43 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:45:42,642 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:42,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1444913468, now seen corresponding path program 42 times [2018-09-28 10:45:42,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:42,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:42,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:42,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:42,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:42,651 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:45:42,651 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:45:42,651 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 [2018-09-28 10:45:42,665 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:45:44,442 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-28 10:45:44,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:45:44,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:45,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:45:45,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-09-28 10:45:45,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-28 10:45:45,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-28 10:45:45,951 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:45,952 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-28 10:45:54,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:45:54,096 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-28 10:45:54,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-28 10:45:54,096 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-28 10:45:54,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:45:54,097 INFO L225 Difference]: With dead ends: 50 [2018-09-28 10:45:54,097 INFO L226 Difference]: Without dead ends: 48 [2018-09-28 10:45:54,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:45:54,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-28 10:45:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-28 10:45:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-28 10:45:54,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-28 10:45:54,103 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-28 10:45:54,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:45:54,103 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-28 10:45:54,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-28 10:45:54,103 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-28 10:45:54,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-28 10:45:54,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:45:54,103 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1] [2018-09-28 10:45:54,104 INFO L423 AbstractCegarLoop]: === Iteration 44 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:45:54,104 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:45:54,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1842646523, now seen corresponding path program 43 times [2018-09-28 10:45:54,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:45:54,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:45:54,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:54,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:45:54,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:45:54,111 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:45:54,111 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:45:54,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:45:54,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:45:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:45:55,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:45:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:45:57,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:45:57,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-09-28 10:45:57,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-28 10:45:57,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-28 10:45:57,264 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:45:57,264 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-28 10:46:05,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:46:05,401 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-28 10:46:05,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:46:05,402 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-28 10:46:05,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:46:05,402 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:46:05,403 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:46:05,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:46:05,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:46:05,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-28 10:46:05,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-28 10:46:05,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-28 10:46:05,407 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-28 10:46:05,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:46:05,408 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-28 10:46:05,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-28 10:46:05,408 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-28 10:46:05,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-28 10:46:05,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:46:05,408 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1] [2018-09-28 10:46:05,409 INFO L423 AbstractCegarLoop]: === Iteration 45 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:46:05,409 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:46:05,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1287469340, now seen corresponding path program 44 times [2018-09-28 10:46:05,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:46:05,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:46:05,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:05,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:46:05,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:05,416 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:46:05,416 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:46:05,416 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 [2018-09-28 10:46:05,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:46:07,122 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:46:07,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:46:07,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:46:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:08,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:46:08,715 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-09-28 10:46:08,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-28 10:46:08,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-28 10:46:08,715 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:46:08,715 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-28 10:46:17,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:46:17,231 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-28 10:46:17,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 10:46:17,231 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-28 10:46:17,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:46:17,232 INFO L225 Difference]: With dead ends: 52 [2018-09-28 10:46:17,232 INFO L226 Difference]: Without dead ends: 50 [2018-09-28 10:46:17,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:46:17,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-28 10:46:17,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-28 10:46:17,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-28 10:46:17,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-28 10:46:17,238 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-28 10:46:17,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:46:17,238 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-28 10:46:17,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-28 10:46:17,238 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-28 10:46:17,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-28 10:46:17,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:46:17,239 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1] [2018-09-28 10:46:17,239 INFO L423 AbstractCegarLoop]: === Iteration 46 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:46:17,239 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:46:17,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1256845851, now seen corresponding path program 45 times [2018-09-28 10:46:17,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:46:17,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:46:17,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:17,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:46:17,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:17,245 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:46:17,246 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:46:17,246 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:46:17,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:46:19,365 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-28 10:46:19,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:46:19,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:46:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:21,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:46:21,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-09-28 10:46:21,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-28 10:46:21,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-28 10:46:21,070 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:46:21,070 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-28 10:46:29,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:46:29,935 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-28 10:46:29,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:46:29,936 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-28 10:46:29,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:46:29,937 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:46:29,937 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:46:29,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:46:29,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:46:29,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-28 10:46:29,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-28 10:46:29,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-28 10:46:29,942 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-28 10:46:29,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:46:29,943 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-28 10:46:29,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-28 10:46:29,943 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-28 10:46:29,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-28 10:46:29,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:46:29,943 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2018-09-28 10:46:29,943 INFO L423 AbstractCegarLoop]: === Iteration 47 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:46:29,944 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:46:29,944 INFO L82 PathProgramCache]: Analyzing trace with hash -307517692, now seen corresponding path program 46 times [2018-09-28 10:46:29,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:46:29,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:46:29,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:29,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:46:29,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:29,951 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:46:29,951 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:46:29,951 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 [2018-09-28 10:46:29,966 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:46:32,336 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:46:32,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:46:32,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:46:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:34,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:46:34,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-09-28 10:46:34,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-28 10:46:34,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-28 10:46:34,050 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:46:34,050 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-28 10:46:43,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:46:43,338 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-28 10:46:43,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-28 10:46:43,338 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-28 10:46:43,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:46:43,339 INFO L225 Difference]: With dead ends: 54 [2018-09-28 10:46:43,339 INFO L226 Difference]: Without dead ends: 52 [2018-09-28 10:46:43,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:46:43,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-28 10:46:43,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-28 10:46:43,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-28 10:46:43,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-28 10:46:43,344 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-28 10:46:43,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:46:43,344 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-28 10:46:43,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-28 10:46:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-28 10:46:43,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-28 10:46:43,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:46:43,345 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1] [2018-09-28 10:46:43,345 INFO L423 AbstractCegarLoop]: === Iteration 48 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:46:43,345 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:46:43,345 INFO L82 PathProgramCache]: Analyzing trace with hash -943115835, now seen corresponding path program 47 times [2018-09-28 10:46:43,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:46:43,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:46:43,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:43,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:46:43,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:43,352 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:46:43,352 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:46:43,352 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 [2018-09-28 10:46:43,370 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:46:45,994 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-28 10:46:45,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:46:46,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:46:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:46:47,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:46:47,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-09-28 10:46:47,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-28 10:46:47,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-28 10:46:47,744 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:46:47,744 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-28 10:46:57,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:46:57,324 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-28 10:46:57,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-28 10:46:57,324 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-28 10:46:57,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:46:57,325 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:46:57,325 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:46:57,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:46:57,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:46:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-28 10:46:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-28 10:46:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-28 10:46:57,331 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-28 10:46:57,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:46:57,331 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-28 10:46:57,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-28 10:46:57,332 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-28 10:46:57,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-28 10:46:57,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:46:57,332 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1] [2018-09-28 10:46:57,332 INFO L423 AbstractCegarLoop]: === Iteration 49 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-09-28 10:46:57,332 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:46:57,333 INFO L82 PathProgramCache]: Analyzing trace with hash 828178212, now seen corresponding path program 48 times [2018-09-28 10:46:57,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:46:57,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:46:57,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:57,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:46:57,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:46:57,339 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:46:57,340 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:46:57,340 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 [2018-09-28 10:46:57,348 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:47:00,107 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-28 10:47:00,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:47:00,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:47:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:47:01,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:47:01,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-09-28 10:47:01,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-28 10:47:01,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-28 10:47:01,955 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:47:01,955 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. Received shutdown request... [2018-09-28 10:47:07,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:47:07,699 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:47:07,705 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:47:07,705 INFO L202 PluginConnector]: Adding new model Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:47:07 BoogieIcfgContainer [2018-09-28 10:47:07,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:47:07,706 INFO L168 Benchmark]: Toolchain (without parser) took 257067.03 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -42.5 MB). Free memory was 1.5 GB in the beginning and 974.1 MB in the end (delta: 503.7 MB). Peak memory consumption was 461.2 MB. Max. memory is 7.1 GB. [2018-09-28 10:47:07,707 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:47:07,708 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.72 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:47:07,708 INFO L168 Benchmark]: Boogie Preprocessor took 25.72 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:47:07,709 INFO L168 Benchmark]: RCFGBuilder took 220.80 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:47:07,709 INFO L168 Benchmark]: TraceAbstraction took 256768.71 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -42.5 MB). Free memory was 1.5 GB in the beginning and 974.1 MB in the end (delta: 482.5 MB). Peak memory consumption was 440.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:47:07,713 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 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.72 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.72 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 220.80 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 256768.71 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -42.5 MB). Free memory was 1.5 GB in the beginning and 974.1 MB in the end (delta: 482.5 MB). Peak memory consumption was 440.1 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 constructing difference of abstraction (53states) and FLOYD_HOARE automaton (currently 32 states, 52 states before enhancement), while ReachableStatesComputation was computing reachable states (31 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 256.7s OverallTime, 49 OverallIterations, 48 TraceHistogramMax, 181.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 144 SDtfs, 55 SDslu, 48 SDs, 0 SdLazy, 45650 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 57.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1371 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=48, 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: 0.2s AutomataMinimizationTime, 48 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 30.4s SatisfiabilityAnalysisTime, 41.5s InterpolantComputationTime, 1372 NumberOfCodeBlocks, 1372 NumberOfCodeBlocksAsserted, 373 NumberOfCheckSat, 1323 ConstructedInterpolants, 0 QuantifiedInterpolants, 484853 SizeOfPredicates, 49 NumberOfNonLiveVariables, 6321 ConjunctsInSsa, 4998 ConjunctsInUnsatCore, 49 InterpolantComputations, 1 PerfectInterpolantSequences, 0/19600 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_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-47-07-724.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Mult1-Safe.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-47-07-724.csv Completed graceful shutdown