java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:00:01,386 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:00:01,390 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:00:01,408 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:00:01,408 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:00:01,409 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:00:01,411 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:00:01,413 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:00:01,418 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:00:01,419 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:00:01,425 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-28 10:00:01,447 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-28 10:00:01,462 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:00:01,463 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:00:01,464 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:00:01,464 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:00:01,464 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:00:01,465 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:00:01,465 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:00:01,465 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:00:01,465 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:00:01,465 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:00:01,466 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:00:01,466 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:00:01,466 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:00:01,466 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:00:01,466 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:00:01,467 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:00:01,467 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:00:01,467 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:00:01,467 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:00:01,467 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:00:01,467 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:00:01,468 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:00:01,468 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:00:01,468 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:00:01,468 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:00:01,468 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:00:01,469 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:00:01,469 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:00:01,469 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:00:01,469 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:00:01,531 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:00:01,547 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:00:01,553 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:00:01,555 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:00:01,555 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:00:01,556 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-28 10:00:01,557 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl' [2018-09-28 10:00:01,617 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:00:01,621 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:00:01,622 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:00:01,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:00:01,622 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:00:01,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:01" (1/1) ... [2018-09-28 10:00:01,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:01" (1/1) ... [2018-09-28 10:00:01,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:00:01,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:00:01,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:00:01,666 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:00:01,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:01" (1/1) ... [2018-09-28 10:00:01,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:01" (1/1) ... [2018-09-28 10:00:01,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:01" (1/1) ... [2018-09-28 10:00:01,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:01" (1/1) ... [2018-09-28 10:00:01,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:01" (1/1) ... [2018-09-28 10:00:01,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:01" (1/1) ... [2018-09-28 10:00:01,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:01" (1/1) ... [2018-09-28 10:00:01,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:00:01,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:00:01,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:00:01,690 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:00:01,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:01" (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 10:00:01,771 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-28 10:00:01,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-28 10:00:01,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-28 10:00:01,994 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-28 10:00:01,995 INFO L202 PluginConnector]: Adding new model gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:00:01 BoogieIcfgContainer [2018-09-28 10:00:01,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:00:01,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:00:01,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:00:02,000 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:00:02,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:01" (1/2) ... [2018-09-28 10:00:02,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bed5074 and model type gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:00:02, skipping insertion in model container [2018-09-28 10:00:02,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:00:01" (2/2) ... [2018-09-28 10:00:02,004 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-28 10:00:02,015 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:00:02,025 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:00:02,083 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:00:02,084 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:00:02,084 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:00:02,084 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:00:02,084 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:00:02,087 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:00:02,087 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:00:02,087 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:00:02,087 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:00:02,104 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-28 10:00:02,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-28 10:00:02,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:02,116 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-28 10:00:02,124 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:02,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:02,138 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-09-28 10:00:02,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:02,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:02,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:02,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:02,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:02,220 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:02,220 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:02,221 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) [2018-09-28 10:00:02,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:00:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:02,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:02,411 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 10:00:02,453 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:00:02,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-28 10:00:02,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:00:02,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:00:02,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 10:00:02,482 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-28 10:00:02,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:02,541 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-28 10:00:02,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:00:02,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-28 10:00:02,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:02,554 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:00:02,554 INFO L226 Difference]: Without dead ends: 5 [2018-09-28 10:00:02,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 10:00:02,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-28 10:00:02,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-28 10:00:02,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-28 10:00:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-28 10:00:02,594 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-28 10:00:02,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:02,595 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-28 10:00:02,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:00:02,595 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-28 10:00:02,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-28 10:00:02,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:02,596 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-28 10:00:02,596 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:02,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:02,597 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-09-28 10:00:02,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:02,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:02,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:02,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:02,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:02,611 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:02,611 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:02,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:02,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:02,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:02,736 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 10:00:02,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:02,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-09-28 10:00:02,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:00:02,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:00:02,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-28 10:00:02,760 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-28 10:00:02,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:02,817 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-28 10:00:02,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:00:02,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-28 10:00:02,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:02,818 INFO L225 Difference]: With dead ends: 8 [2018-09-28 10:00:02,818 INFO L226 Difference]: Without dead ends: 6 [2018-09-28 10:00:02,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-28 10:00:02,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-28 10:00:02,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-28 10:00:02,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-28 10:00:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-28 10:00:02,823 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-28 10:00:02,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:02,823 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-28 10:00:02,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:00:02,824 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-28 10:00:02,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:00:02,824 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:02,824 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-28 10:00:02,825 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:02,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:02,825 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2018-09-28 10:00:02,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:02,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:02,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:02,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:02,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:02,834 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:02,835 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:02,835 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 10:00:02,851 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:02,871 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:02,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:02,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:02,982 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 10:00:03,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:03,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-09-28 10:00:03,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:00:03,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:00:03,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:00:03,004 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-28 10:00:03,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:03,093 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-28 10:00:03,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:00:03,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-28 10:00:03,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:03,095 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:00:03,096 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 10:00:03,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:00:03,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 10:00:03,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-28 10:00:03,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-28 10:00:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-28 10:00:03,100 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-28 10:00:03,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:03,100 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-28 10:00:03,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:00:03,101 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-28 10:00:03,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-28 10:00:03,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:03,101 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-28 10:00:03,102 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:03,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:03,102 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2018-09-28 10:00:03,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:03,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:03,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:03,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:03,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:03,111 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:03,112 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:03,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:03,125 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:03,139 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-28 10:00:03,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:03,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:03,337 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 10:00:03,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:03,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-09-28 10:00:03,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:00:03,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:00:03,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:00:03,359 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-28 10:00:03,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:03,549 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-28 10:00:03,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:00:03,550 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-28 10:00:03,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:03,551 INFO L225 Difference]: With dead ends: 10 [2018-09-28 10:00:03,551 INFO L226 Difference]: Without dead ends: 8 [2018-09-28 10:00:03,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:00:03,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-28 10:00:03,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-28 10:00:03,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:00:03,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-28 10:00:03,556 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-28 10:00:03,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:03,556 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-28 10:00:03,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:00:03,557 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-28 10:00:03,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:00:03,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:03,557 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-28 10:00:03,560 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:03,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:03,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2018-09-28 10:00:03,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:03,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:03,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:03,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:03,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:03,585 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:03,587 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:03,587 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 10:00:03,604 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:03,622 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:03,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:03,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:03,880 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 10:00:03,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:03,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-09-28 10:00:03,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:00:03,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:00:03,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:00:03,908 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-28 10:00:03,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:03,968 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:00:03,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:00:03,969 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-28 10:00:03,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:03,969 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:00:03,970 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 10:00:03,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:00:03,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 10:00:03,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-28 10:00:03,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-28 10:00:03,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-28 10:00:03,974 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-28 10:00:03,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:03,974 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-28 10:00:03,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:00:03,975 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-28 10:00:03,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:00:03,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:03,975 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-28 10:00:03,976 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:03,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash 317188140, now seen corresponding path program 5 times [2018-09-28 10:00:03,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:03,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:03,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:03,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:03,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:03,987 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:03,987 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:03,987 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 10:00:03,998 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:04,010 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-28 10:00:04,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:04,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:04,160 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 10:00:04,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:04,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-09-28 10:00:04,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:00:04,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:00:04,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:00:04,182 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-28 10:00:04,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:04,445 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-28 10:00:04,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:00:04,446 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-28 10:00:04,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:04,446 INFO L225 Difference]: With dead ends: 12 [2018-09-28 10:00:04,447 INFO L226 Difference]: Without dead ends: 10 [2018-09-28 10:00:04,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:00:04,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-28 10:00:04,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-28 10:00:04,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:00:04,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-28 10:00:04,451 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-28 10:00:04,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:04,451 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-28 10:00:04,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:00:04,451 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-28 10:00:04,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:00:04,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:04,452 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-28 10:00:04,453 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:04,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:04,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1242899555, now seen corresponding path program 6 times [2018-09-28 10:00:04,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:04,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:04,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:04,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:04,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:04,469 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:04,469 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:04,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:04,490 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:04,509 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-28 10:00:04,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:04,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:04,764 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 10:00:04,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:04,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-09-28 10:00:04,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:00:04,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:00:04,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:00:04,791 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-28 10:00:04,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:04,889 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-28 10:00:04,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:00:04,890 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-28 10:00:04,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:04,891 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:00:04,892 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 10:00:04,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:00:04,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 10:00:04,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-28 10:00:04,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 10:00:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-28 10:00:04,895 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-28 10:00:04,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:04,896 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-28 10:00:04,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:00:04,896 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-28 10:00:04,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 10:00:04,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:04,897 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-28 10:00:04,897 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:04,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash -124817652, now seen corresponding path program 7 times [2018-09-28 10:00:04,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:04,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:04,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:04,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:04,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:04,910 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:04,910 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:04,911 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 10:00:04,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:04,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:05,116 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 10:00:05,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:05,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-09-28 10:00:05,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:00:05,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:00:05,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:00:05,141 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-28 10:00:05,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:05,232 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-28 10:00:05,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:00:05,233 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-28 10:00:05,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:05,234 INFO L225 Difference]: With dead ends: 14 [2018-09-28 10:00:05,234 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 10:00:05,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:00:05,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 10:00:05,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-28 10:00:05,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:00:05,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-28 10:00:05,239 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-28 10:00:05,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:05,239 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-28 10:00:05,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:00:05,239 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-28 10:00:05,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:00:05,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:05,240 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-28 10:00:05,240 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:05,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:05,241 INFO L82 PathProgramCache]: Analyzing trace with hash 425621891, now seen corresponding path program 8 times [2018-09-28 10:00:05,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:05,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:05,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:05,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:05,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:05,251 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:05,252 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:05,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:05,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:05,281 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:05,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:05,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:05,512 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 10:00:05,534 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:05,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-09-28 10:00:05,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:00:05,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:00:05,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:00:05,535 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-28 10:00:05,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:05,654 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-28 10:00:05,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:00:05,655 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-28 10:00:05,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:05,655 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:00:05,656 INFO L226 Difference]: Without dead ends: 13 [2018-09-28 10:00:05,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:00:05,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-28 10:00:05,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-28 10:00:05,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-28 10:00:05,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-28 10:00:05,660 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-28 10:00:05,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:05,660 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-28 10:00:05,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:00:05,660 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-28 10:00:05,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 10:00:05,661 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:05,661 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-28 10:00:05,661 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:05,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:05,662 INFO L82 PathProgramCache]: Analyzing trace with hash 309378540, now seen corresponding path program 9 times [2018-09-28 10:00:05,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:05,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:05,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:05,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:05,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:05,672 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:05,673 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:05,673 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 10:00:05,685 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:05,702 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:00:05,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:05,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:05,889 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 10:00:05,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:05,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-09-28 10:00:05,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:00:05,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:00:05,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-28 10:00:05,911 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-28 10:00:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:06,062 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-28 10:00:06,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:00:06,062 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-28 10:00:06,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:06,063 INFO L225 Difference]: With dead ends: 16 [2018-09-28 10:00:06,063 INFO L226 Difference]: Without dead ends: 14 [2018-09-28 10:00:06,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-28 10:00:06,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-28 10:00:06,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-28 10:00:06,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:00:06,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-28 10:00:06,068 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-28 10:00:06,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:06,068 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-28 10:00:06,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:00:06,068 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-28 10:00:06,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:00:06,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:06,069 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-28 10:00:06,069 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:06,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:06,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1000801955, now seen corresponding path program 10 times [2018-09-28 10:00:06,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:06,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:06,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:06,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:06,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:06,082 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:06,082 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:06,082 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 10:00:06,091 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:06,108 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:06,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:06,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:06,465 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 10:00:06,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:06,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-09-28 10:00:06,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 10:00:06,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 10:00:06,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-28 10:00:06,487 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-28 10:00:06,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:06,631 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-28 10:00:06,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:00:06,638 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-28 10:00:06,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:06,638 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:00:06,638 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 10:00:06,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-28 10:00:06,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 10:00:06,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-28 10:00:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-28 10:00:06,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-28 10:00:06,643 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-28 10:00:06,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:06,643 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-28 10:00:06,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 10:00:06,644 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-28 10:00:06,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 10:00:06,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:06,644 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-28 10:00:06,645 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:06,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:06,645 INFO L82 PathProgramCache]: Analyzing trace with hash 960091340, now seen corresponding path program 11 times [2018-09-28 10:00:06,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:06,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:06,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:06,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:06,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:06,659 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:06,659 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:06,660 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 10:00:06,676 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:06,696 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:00:06,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:06,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:07,132 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 10:00:07,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:07,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-09-28 10:00:07,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:00:07,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:00:07,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-28 10:00:07,160 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-28 10:00:07,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:07,326 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-28 10:00:07,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:00:07,327 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-28 10:00:07,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:07,328 INFO L225 Difference]: With dead ends: 18 [2018-09-28 10:00:07,328 INFO L226 Difference]: Without dead ends: 16 [2018-09-28 10:00:07,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-28 10:00:07,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-28 10:00:07,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-28 10:00:07,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:00:07,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-28 10:00:07,333 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-28 10:00:07,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:07,333 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-28 10:00:07,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:00:07,334 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-28 10:00:07,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:00:07,334 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:07,334 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-28 10:00:07,335 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:07,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:07,335 INFO L82 PathProgramCache]: Analyzing trace with hash -301937725, now seen corresponding path program 12 times [2018-09-28 10:00:07,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:07,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:07,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:07,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:07,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:07,346 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:07,346 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:07,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:07,360 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:07,381 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:00:07,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:07,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:07,611 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 10:00:07,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:07,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-09-28 10:00:07,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 10:00:07,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 10:00:07,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-28 10:00:07,636 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-28 10:00:07,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:07,873 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-28 10:00:07,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:00:07,876 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-28 10:00:07,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:07,876 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:00:07,876 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:00:07,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-28 10:00:07,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:00:07,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-28 10:00:07,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-28 10:00:07,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-28 10:00:07,884 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-28 10:00:07,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:07,884 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-28 10:00:07,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 10:00:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-28 10:00:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-28 10:00:07,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:07,885 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-28 10:00:07,885 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:07,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:07,886 INFO L82 PathProgramCache]: Analyzing trace with hash -770133076, now seen corresponding path program 13 times [2018-09-28 10:00:07,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:07,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:07,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:07,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:07,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:07,912 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:07,913 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:07,913 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 10:00:07,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:07,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:08,556 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 10:00:08,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:08,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-09-28 10:00:08,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:00:08,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:00:08,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-28 10:00:08,586 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-28 10:00:08,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:08,771 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-28 10:00:08,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:00:08,772 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-28 10:00:08,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:08,773 INFO L225 Difference]: With dead ends: 20 [2018-09-28 10:00:08,773 INFO L226 Difference]: Without dead ends: 18 [2018-09-28 10:00:08,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-28 10:00:08,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-28 10:00:08,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-28 10:00:08,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:00:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-28 10:00:08,778 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-28 10:00:08,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:08,778 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-28 10:00:08,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:00:08,778 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-28 10:00:08,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:00:08,779 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:08,779 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-28 10:00:08,779 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:08,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:08,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1895680227, now seen corresponding path program 14 times [2018-09-28 10:00:08,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:08,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:08,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:08,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:08,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:08,790 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:08,790 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:08,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:08,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:08,834 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:08,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:08,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:10,410 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 10:00:10,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:10,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-09-28 10:00:10,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:00:10,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:00:10,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-28 10:00:10,432 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-28 10:00:10,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:10,623 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-28 10:00:10,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:00:10,625 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-28 10:00:10,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:10,626 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:00:10,626 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:00:10,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-28 10:00:10,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:00:10,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-28 10:00:10,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 10:00:10,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-28 10:00:10,630 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-28 10:00:10,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:10,631 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-28 10:00:10,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:00:10,631 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-28 10:00:10,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 10:00:10,631 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:10,632 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-28 10:00:10,632 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:10,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:10,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1363453300, now seen corresponding path program 15 times [2018-09-28 10:00:10,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:10,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:10,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:10,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:10,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:10,642 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:10,642 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:10,642 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 10:00:10,659 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:10,704 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:00:10,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:10,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:11,174 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 10:00:11,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:11,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-09-28 10:00:11,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:00:11,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:00:11,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-28 10:00:11,196 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-28 10:00:11,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:11,490 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-28 10:00:11,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:00:11,497 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-28 10:00:11,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:11,497 INFO L225 Difference]: With dead ends: 22 [2018-09-28 10:00:11,497 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:00:11,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-28 10:00:11,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:00:11,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-28 10:00:11,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:00:11,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-28 10:00:11,506 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-28 10:00:11,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:11,506 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-28 10:00:11,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:00:11,506 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-28 10:00:11,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:00:11,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:11,507 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-28 10:00:11,507 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:11,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:11,507 INFO L82 PathProgramCache]: Analyzing trace with hash 682622467, now seen corresponding path program 16 times [2018-09-28 10:00:11,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:11,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:11,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:11,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:11,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:11,519 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:11,519 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:11,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:11,540 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:11,565 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:11,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:11,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:11,910 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 10:00:11,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:11,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-09-28 10:00:11,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 10:00:11,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 10:00:11,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-28 10:00:11,942 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-28 10:00:12,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:12,265 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-28 10:00:12,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:00:12,267 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-28 10:00:12,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:12,267 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:00:12,267 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:00:12,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-28 10:00:12,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:00:12,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-28 10:00:12,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-28 10:00:12,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-28 10:00:12,271 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-28 10:00:12,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:12,272 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-28 10:00:12,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 10:00:12,272 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-28 10:00:12,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 10:00:12,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:12,273 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-28 10:00:12,273 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:12,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:12,273 INFO L82 PathProgramCache]: Analyzing trace with hash -313538196, now seen corresponding path program 17 times [2018-09-28 10:00:12,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:12,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:12,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:12,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:12,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:12,283 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:12,283 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:12,283 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 10:00:12,299 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:12,327 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-28 10:00:12,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:12,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:12,746 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 10:00:12,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:12,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-09-28 10:00:12,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:00:12,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:00:12,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:00:12,769 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-28 10:00:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:13,064 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-28 10:00:13,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:00:13,066 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-28 10:00:13,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:13,066 INFO L225 Difference]: With dead ends: 24 [2018-09-28 10:00:13,067 INFO L226 Difference]: Without dead ends: 22 [2018-09-28 10:00:13,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:00:13,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-28 10:00:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-28 10:00:13,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:00:13,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-28 10:00:13,072 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-28 10:00:13,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:13,072 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-28 10:00:13,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:00:13,072 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-28 10:00:13,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-28 10:00:13,073 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:13,073 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-28 10:00:13,073 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:13,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:13,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1129747677, now seen corresponding path program 18 times [2018-09-28 10:00:13,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:13,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:13,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:13,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:13,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:13,083 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:13,083 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:13,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:13,098 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:13,140 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-28 10:00:13,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:13,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:13,464 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 10:00:13,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:13,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-09-28 10:00:13,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 10:00:13,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 10:00:13,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-28 10:00:13,486 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-28 10:00:13,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:13,805 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-28 10:00:13,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:00:13,805 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-28 10:00:13,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:13,806 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:00:13,807 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:00:13,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-28 10:00:13,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:00:13,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-28 10:00:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 10:00:13,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-28 10:00:13,812 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-28 10:00:13,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:13,812 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-28 10:00:13,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 10:00:13,812 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-28 10:00:13,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 10:00:13,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:13,813 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-28 10:00:13,813 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:13,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:13,814 INFO L82 PathProgramCache]: Analyzing trace with hash -662437812, now seen corresponding path program 19 times [2018-09-28 10:00:13,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:13,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:13,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:13,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:13,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:13,835 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:13,835 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:13,835 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 10:00:13,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:13,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:14,229 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 10:00:14,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:14,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-09-28 10:00:14,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:00:14,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:00:14,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-28 10:00:14,251 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-28 10:00:14,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:14,616 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-28 10:00:14,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:00:14,617 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-28 10:00:14,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:14,618 INFO L225 Difference]: With dead ends: 26 [2018-09-28 10:00:14,618 INFO L226 Difference]: Without dead ends: 24 [2018-09-28 10:00:14,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-28 10:00:14,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-28 10:00:14,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-28 10:00:14,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:00:14,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-28 10:00:14,624 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-28 10:00:14,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:14,624 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-28 10:00:14,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:00:14,625 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-28 10:00:14,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-28 10:00:14,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:14,626 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-28 10:00:14,626 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:14,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:14,626 INFO L82 PathProgramCache]: Analyzing trace with hash 939266115, now seen corresponding path program 20 times [2018-09-28 10:00:14,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:14,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:14,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:14,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:14,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:14,636 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:14,637 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:14,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:14,654 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:14,683 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:14,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:14,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:15,044 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 10:00:15,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:15,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-09-28 10:00:15,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:00:15,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:00:15,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-28 10:00:15,065 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-28 10:00:15,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:15,738 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-28 10:00:15,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:00:15,738 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-28 10:00:15,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:15,739 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:00:15,740 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:00:15,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-28 10:00:15,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:00:15,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-28 10:00:15,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-28 10:00:15,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-28 10:00:15,745 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-28 10:00:15,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:15,745 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-28 10:00:15,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:00:15,745 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-28 10:00:15,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-28 10:00:15,746 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:15,746 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-28 10:00:15,746 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:15,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:15,747 INFO L82 PathProgramCache]: Analyzing trace with hash -947519700, now seen corresponding path program 21 times [2018-09-28 10:00:15,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:15,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:15,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:15,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:15,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:15,755 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:15,756 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:15,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:15,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:15,898 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-28 10:00:15,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:15,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:16,256 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 10:00:16,277 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:16,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-09-28 10:00:16,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:00:16,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:00:16,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-28 10:00:16,278 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-28 10:00:16,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:16,849 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-28 10:00:16,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:00:16,851 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-28 10:00:16,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:16,852 INFO L225 Difference]: With dead ends: 28 [2018-09-28 10:00:16,852 INFO L226 Difference]: Without dead ends: 26 [2018-09-28 10:00:16,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-28 10:00:16,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-28 10:00:16,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-28 10:00:16,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:00:16,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-28 10:00:16,857 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-28 10:00:16,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:16,857 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-28 10:00:16,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:00:16,858 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-28 10:00:16,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-28 10:00:16,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:16,858 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-28 10:00:16,858 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:16,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:16,859 INFO L82 PathProgramCache]: Analyzing trace with hash 691662179, now seen corresponding path program 22 times [2018-09-28 10:00:16,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:16,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:16,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:16,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:16,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:16,867 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:16,867 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:16,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:16,880 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:16,911 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:16,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:16,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:17,439 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 10:00:17,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:17,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-09-28 10:00:17,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-28 10:00:17,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-28 10:00:17,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-28 10:00:17,461 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-28 10:00:18,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:18,241 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-28 10:00:18,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:00:18,243 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-28 10:00:18,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:18,244 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:00:18,244 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:00:18,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-28 10:00:18,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:00:18,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-28 10:00:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-28 10:00:18,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-28 10:00:18,249 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-28 10:00:18,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:18,249 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-28 10:00:18,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-28 10:00:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-28 10:00:18,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:00:18,250 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:18,250 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-28 10:00:18,250 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:18,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:18,251 INFO L82 PathProgramCache]: Analyzing trace with hash -33307124, now seen corresponding path program 23 times [2018-09-28 10:00:18,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:18,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:18,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:18,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:18,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:18,259 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:18,259 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:18,259 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 10:00:18,275 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:18,316 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-28 10:00:18,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:18,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:18,901 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 10:00:18,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:18,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-09-28 10:00:18,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:00:18,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:00:18,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-28 10:00:18,932 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-28 10:00:19,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:19,511 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-28 10:00:19,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:00:19,512 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-28 10:00:19,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:19,512 INFO L225 Difference]: With dead ends: 30 [2018-09-28 10:00:19,512 INFO L226 Difference]: Without dead ends: 28 [2018-09-28 10:00:19,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-28 10:00:19,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-28 10:00:19,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-28 10:00:19,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:00:19,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-28 10:00:19,519 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-28 10:00:19,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:19,519 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-28 10:00:19,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:00:19,519 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-28 10:00:19,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-28 10:00:19,520 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:19,520 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-28 10:00:19,520 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:19,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:19,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1032519037, now seen corresponding path program 24 times [2018-09-28 10:00:19,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:19,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:19,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:19,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:19,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:19,528 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:19,528 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:19,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:00:19,545 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:19,603 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-28 10:00:19,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:19,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:20,045 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 10:00:20,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:20,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-09-28 10:00:20,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-28 10:00:20,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-28 10:00:20,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-28 10:00:20,067 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-28 10:00:20,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:20,666 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-28 10:00:20,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:00:20,667 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-28 10:00:20,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:20,668 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:00:20,668 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:00:20,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-28 10:00:20,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:00:20,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-28 10:00:20,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-28 10:00:20,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-28 10:00:20,674 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-28 10:00:20,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:20,675 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-28 10:00:20,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-28 10:00:20,675 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-28 10:00:20,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-28 10:00:20,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:20,676 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-28 10:00:20,676 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:20,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:20,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1943317268, now seen corresponding path program 25 times [2018-09-28 10:00:20,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:20,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:20,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:20,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:20,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:20,685 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:20,685 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:20,685 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 10:00:20,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:20,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:21,277 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 10:00:21,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:21,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-09-28 10:00:21,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:00:21,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:00:21,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-28 10:00:21,301 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-28 10:00:21,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:21,999 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-28 10:00:22,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:00:22,000 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-28 10:00:22,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:22,001 INFO L225 Difference]: With dead ends: 32 [2018-09-28 10:00:22,001 INFO L226 Difference]: Without dead ends: 30 [2018-09-28 10:00:22,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-28 10:00:22,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-28 10:00:22,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-28 10:00:22,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:00:22,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-28 10:00:22,006 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-28 10:00:22,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:22,006 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-28 10:00:22,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:00:22,006 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-28 10:00:22,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-28 10:00:22,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:22,007 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-28 10:00:22,008 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:22,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:22,008 INFO L82 PathProgramCache]: Analyzing trace with hash -113291357, now seen corresponding path program 26 times [2018-09-28 10:00:22,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:22,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:22,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:22,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:22,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:22,018 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:22,018 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:22,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:22,032 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:22,082 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:22,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:22,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:22,742 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 10:00:22,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:22,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-09-28 10:00:22,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:00:22,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:00:22,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-28 10:00:22,764 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-28 10:00:23,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:23,376 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-28 10:00:23,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:00:23,376 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-28 10:00:23,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:23,377 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:00:23,377 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:00:23,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-28 10:00:23,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:00:23,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-28 10:00:23,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 10:00:23,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-28 10:00:23,383 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-28 10:00:23,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:23,383 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-28 10:00:23,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:00:23,383 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-28 10:00:23,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 10:00:23,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:23,384 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-28 10:00:23,384 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:23,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:23,385 INFO L82 PathProgramCache]: Analyzing trace with hash 782937036, now seen corresponding path program 27 times [2018-09-28 10:00:23,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:23,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:23,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:23,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:23,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:23,392 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:23,392 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:23,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:23,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:23,700 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-28 10:00:23,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:23,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:24,268 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 10:00:24,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:24,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-09-28 10:00:24,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:00:24,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:00:24,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-28 10:00:24,291 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-28 10:00:24,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:24,869 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-28 10:00:24,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:00:24,870 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-28 10:00:24,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:24,870 INFO L225 Difference]: With dead ends: 34 [2018-09-28 10:00:24,871 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:00:24,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-28 10:00:24,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:00:24,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-28 10:00:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:00:24,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-28 10:00:24,877 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-28 10:00:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:24,877 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-28 10:00:24,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:00:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-28 10:00:24,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-28 10:00:24,878 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:24,878 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-28 10:00:24,878 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:24,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:24,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1498753853, now seen corresponding path program 28 times [2018-09-28 10:00:24,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:24,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:24,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:24,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:24,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:24,886 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:24,886 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:24,886 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 10:00:24,904 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:24,953 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:24,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:24,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:25,496 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 10:00:25,516 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:25,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-09-28 10:00:25,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-28 10:00:25,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-28 10:00:25,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-28 10:00:25,517 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-28 10:00:26,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:26,149 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-28 10:00:26,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:00:26,150 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-28 10:00:26,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:26,150 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:00:26,151 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:00:26,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-28 10:00:26,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:00:26,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-28 10:00:26,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-28 10:00:26,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-28 10:00:26,156 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-28 10:00:26,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:26,156 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-28 10:00:26,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-28 10:00:26,156 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-28 10:00:26,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 10:00:26,157 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:26,157 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-28 10:00:26,157 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:26,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:26,157 INFO L82 PathProgramCache]: Analyzing trace with hash 783272620, now seen corresponding path program 29 times [2018-09-28 10:00:26,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:26,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:26,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:26,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:26,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:26,165 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:26,165 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:26,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-09-28 10:00:26,186 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:00:26,244 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-28 10:00:26,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:26,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:27,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:27,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-09-28 10:00:27,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:00:27,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:00:27,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:00:27,138 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-28 10:00:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:27,872 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-28 10:00:27,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:00:27,873 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-28 10:00:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:27,874 INFO L225 Difference]: With dead ends: 36 [2018-09-28 10:00:27,874 INFO L226 Difference]: Without dead ends: 34 [2018-09-28 10:00:27,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:00:27,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-28 10:00:27,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-28 10:00:27,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:00:27,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-28 10:00:27,879 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-28 10:00:27,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:27,879 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-28 10:00:27,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:00:27,879 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-28 10:00:27,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 10:00:27,880 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:27,880 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-28 10:00:27,880 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:27,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:27,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1488350749, now seen corresponding path program 30 times [2018-09-28 10:00:27,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:27,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:27,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:27,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:27,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:27,889 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:27,889 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:27,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:27,927 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:28,113 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-28 10:00:28,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:28,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:29,757 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 10:00:29,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:29,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-09-28 10:00:29,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-28 10:00:29,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-28 10:00:29,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-28 10:00:29,780 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-28 10:00:30,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:30,502 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-28 10:00:30,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:00:30,503 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-28 10:00:30,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:30,503 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:00:30,504 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:00:30,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-28 10:00:30,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:00:30,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-28 10:00:30,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-28 10:00:30,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-28 10:00:30,508 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-28 10:00:30,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:30,509 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-28 10:00:30,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-28 10:00:30,509 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-28 10:00:30,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 10:00:30,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:30,509 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-28 10:00:30,509 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:30,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:30,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1105768844, now seen corresponding path program 31 times [2018-09-28 10:00:30,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:30,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:30,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:30,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:30,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:30,519 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:30,519 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:30,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:30,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:30,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:31,214 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 10:00:31,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:31,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-09-28 10:00:31,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:00:31,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:00:31,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 10:00:31,235 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-28 10:00:32,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:32,140 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-28 10:00:32,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:00:32,140 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-28 10:00:32,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:32,141 INFO L225 Difference]: With dead ends: 38 [2018-09-28 10:00:32,141 INFO L226 Difference]: Without dead ends: 36 [2018-09-28 10:00:32,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 10:00:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-28 10:00:32,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-28 10:00:32,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-28 10:00:32,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-28 10:00:32,147 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-28 10:00:32,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:32,147 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-28 10:00:32,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:00:32,148 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-28 10:00:32,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-28 10:00:32,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:32,148 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-28 10:00:32,148 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:32,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:32,149 INFO L82 PathProgramCache]: Analyzing trace with hash -80902397, now seen corresponding path program 32 times [2018-09-28 10:00:32,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:32,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:32,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:32,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:32,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:32,156 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:32,156 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:32,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:32,171 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:32,228 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:32,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:32,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:32,927 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 10:00:32,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:32,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-09-28 10:00:32,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:00:32,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:00:32,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-28 10:00:32,949 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-28 10:00:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:33,819 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-28 10:00:33,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:00:33,819 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-28 10:00:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:33,820 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:00:33,820 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:00:33,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-28 10:00:33,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:00:33,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-28 10:00:33,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 10:00:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-28 10:00:33,826 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-28 10:00:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:33,827 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-28 10:00:33,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:00:33,827 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-28 10:00:33,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-28 10:00:33,827 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:33,828 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-28 10:00:33,828 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:33,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:33,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1786994796, now seen corresponding path program 33 times [2018-09-28 10:00:33,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:33,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:33,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:33,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:33,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:33,835 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:33,835 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:33,835 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 10:00:33,848 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:34,519 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-28 10:00:34,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:34,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:35,363 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 10:00:35,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:35,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-09-28 10:00:35,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:00:35,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:00:35,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 10:00:35,386 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-28 10:00:36,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:36,265 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-28 10:00:36,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:00:36,265 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-28 10:00:36,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:36,266 INFO L225 Difference]: With dead ends: 40 [2018-09-28 10:00:36,266 INFO L226 Difference]: Without dead ends: 38 [2018-09-28 10:00:36,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 10:00:36,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-28 10:00:36,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-28 10:00:36,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-28 10:00:36,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-28 10:00:36,271 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-28 10:00:36,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:36,271 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-28 10:00:36,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:00:36,271 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-28 10:00:36,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-28 10:00:36,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:36,272 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-28 10:00:36,272 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:36,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:36,272 INFO L82 PathProgramCache]: Analyzing trace with hash -437734365, now seen corresponding path program 34 times [2018-09-28 10:00:36,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:36,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:36,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:36,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:36,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:36,279 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:36,280 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:36,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:36,296 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:36,360 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:36,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:36,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:37,429 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 10:00:37,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:37,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-09-28 10:00:37,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-28 10:00:37,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-28 10:00:37,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-28 10:00:37,451 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-28 10:00:38,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:38,452 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-28 10:00:38,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:00:38,453 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-28 10:00:38,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:38,453 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:00:38,454 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:00:38,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-28 10:00:38,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:00:38,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-28 10:00:38,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-28 10:00:38,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-28 10:00:38,462 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-28 10:00:38,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:38,462 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-28 10:00:38,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-28 10:00:38,463 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-28 10:00:38,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:00:38,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:38,463 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-28 10:00:38,464 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:38,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:38,464 INFO L82 PathProgramCache]: Analyzing trace with hash -684861620, now seen corresponding path program 35 times [2018-09-28 10:00:38,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:38,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:38,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:38,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:38,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:38,473 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:38,473 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:38,473 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 10:00:38,485 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:38,553 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-28 10:00:38,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:38,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:39,730 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 10:00:39,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:39,750 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-09-28 10:00:39,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:00:39,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:00:39,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:00:39,751 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-28 10:00:40,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:40,794 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-28 10:00:40,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:00:40,794 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-28 10:00:40,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:40,795 INFO L225 Difference]: With dead ends: 42 [2018-09-28 10:00:40,795 INFO L226 Difference]: Without dead ends: 40 [2018-09-28 10:00:40,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:00:40,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-28 10:00:40,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-28 10:00:40,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-28 10:00:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-28 10:00:40,800 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-28 10:00:40,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:40,801 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-28 10:00:40,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:00:40,801 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-28 10:00:40,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-28 10:00:40,801 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:40,801 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-28 10:00:40,802 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:40,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:40,802 INFO L82 PathProgramCache]: Analyzing trace with hash 244128067, now seen corresponding path program 36 times [2018-09-28 10:00:40,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:40,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:40,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:40,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:40,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:40,809 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:40,809 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:40,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:40,823 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:41,029 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-28 10:00:41,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:41,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:41,890 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 10:00:41,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:41,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-09-28 10:00:41,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-28 10:00:41,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-28 10:00:41,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-28 10:00:41,912 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-28 10:00:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:43,049 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-28 10:00:43,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:00:43,050 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-28 10:00:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:43,050 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:00:43,051 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:00:43,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-28 10:00:43,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:00:43,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-28 10:00:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-28 10:00:43,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-28 10:00:43,056 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-28 10:00:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:43,057 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-28 10:00:43,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-28 10:00:43,057 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-28 10:00:43,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-28 10:00:43,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:43,058 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-28 10:00:43,058 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:43,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:43,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1021962708, now seen corresponding path program 37 times [2018-09-28 10:00:43,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:43,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:43,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:43,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:43,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:43,067 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:43,067 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:43,067 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 10:00:43,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:43,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:44,040 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 10:00:44,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:44,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-09-28 10:00:44,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:00:44,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:00:44,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-28 10:00:44,063 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-28 10:00:45,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:45,143 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-28 10:00:45,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:00:45,143 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-28 10:00:45,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:45,144 INFO L225 Difference]: With dead ends: 44 [2018-09-28 10:00:45,144 INFO L226 Difference]: Without dead ends: 42 [2018-09-28 10:00:45,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-28 10:00:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-28 10:00:45,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-28 10:00:45,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-28 10:00:45,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-28 10:00:45,149 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-28 10:00:45,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:45,149 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-28 10:00:45,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:00:45,150 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-28 10:00:45,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-28 10:00:45,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:45,150 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-28 10:00:45,151 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:45,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:45,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1616071069, now seen corresponding path program 38 times [2018-09-28 10:00:45,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:45,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:45,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:45,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:45,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:45,158 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:45,159 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:45,159 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) [2018-09-28 10:00:45,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:00:45,237 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:45,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:45,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:46,095 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 10:00:46,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:46,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-09-28 10:00:46,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:00:46,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:00:46,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-28 10:00:46,117 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-28 10:00:47,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:47,302 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-28 10:00:47,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:00:47,303 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-28 10:00:47,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:47,303 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:00:47,303 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:00:47,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-28 10:00:47,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:00:47,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-28 10:00:47,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 10:00:47,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-28 10:00:47,308 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-28 10:00:47,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:47,308 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-28 10:00:47,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:00:47,308 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-28 10:00:47,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-28 10:00:47,309 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:47,309 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-28 10:00:47,309 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:47,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:47,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1441406220, now seen corresponding path program 39 times [2018-09-28 10:00:47,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:47,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:47,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:47,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:47,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:47,316 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:47,316 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:47,316 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 10:00:47,325 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:48,715 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-28 10:00:48,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:48,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:49,591 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 10:00:49,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:49,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-09-28 10:00:49,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-28 10:00:49,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-28 10:00:49,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-28 10:00:49,613 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-28 10:00:50,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:50,788 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-28 10:00:50,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-28 10:00:50,789 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-28 10:00:50,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:50,790 INFO L225 Difference]: With dead ends: 46 [2018-09-28 10:00:50,790 INFO L226 Difference]: Without dead ends: 44 [2018-09-28 10:00:50,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-28 10:00:50,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-28 10:00:50,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-28 10:00:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-28 10:00:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-28 10:00:50,795 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-28 10:00:50,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:50,795 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-28 10:00:50,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-28 10:00:50,795 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-28 10:00:50,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-28 10:00:50,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:50,796 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-28 10:00:50,796 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:50,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:50,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1733921667, now seen corresponding path program 40 times [2018-09-28 10:00:50,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:50,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:50,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:50,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:50,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:50,804 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:50,804 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:50,804 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 10:00:50,820 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:50,914 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:50,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:50,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:52,035 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 10:00:52,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:52,056 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-09-28 10:00:52,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-28 10:00:52,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-28 10:00:52,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-28 10:00:52,057 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-28 10:00:53,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:53,534 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-28 10:00:53,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:00:53,535 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-28 10:00:53,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:53,536 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:00:53,536 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:00:53,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-28 10:00:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:00:53,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-28 10:00:53,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-28 10:00:53,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-28 10:00:53,540 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-28 10:00:53,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:53,540 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-28 10:00:53,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-28 10:00:53,540 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-28 10:00:53,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-28 10:00:53,540 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:53,540 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-28 10:00:53,541 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:53,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:53,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2083001364, now seen corresponding path program 41 times [2018-09-28 10:00:53,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:53,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:53,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:53,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:53,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:53,548 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:53,549 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:53,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:53,562 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:53,653 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-28 10:00:53,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:53,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:54,666 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 10:00:54,687 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:54,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-09-28 10:00:54,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:00:54,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:00:54,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:00:54,689 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-28 10:00:55,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:55,963 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-28 10:00:55,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-28 10:00:55,963 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-28 10:00:55,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:55,964 INFO L225 Difference]: With dead ends: 48 [2018-09-28 10:00:55,964 INFO L226 Difference]: Without dead ends: 46 [2018-09-28 10:00:55,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:00:55,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-28 10:00:55,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-28 10:00:55,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-28 10:00:55,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-28 10:00:55,969 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-28 10:00:55,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:55,969 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-28 10:00:55,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:00:55,969 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-28 10:00:55,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-28 10:00:55,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:55,969 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-28 10:00:55,970 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:55,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:55,970 INFO L82 PathProgramCache]: Analyzing trace with hash -148531037, now seen corresponding path program 42 times [2018-09-28 10:00:55,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:55,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:55,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:55,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:55,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:55,976 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:55,976 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:55,977 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:00:55,987 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:56,463 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-28 10:00:56,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:56,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:58,310 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 10:00:58,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:00:58,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-09-28 10:00:58,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-28 10:00:58,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-28 10:00:58,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-28 10:00:58,333 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-28 10:00:59,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:59,791 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-28 10:00:59,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 10:00:59,792 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-28 10:00:59,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:59,792 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:00:59,793 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:00:59,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-28 10:00:59,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:00:59,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-28 10:00:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-28 10:00:59,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-28 10:00:59,798 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-28 10:00:59,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:59,799 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-28 10:00:59,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-28 10:00:59,799 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-28 10:00:59,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-28 10:00:59,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:59,800 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-28 10:00:59,800 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:59,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:59,800 INFO L82 PathProgramCache]: Analyzing trace with hash -309493044, now seen corresponding path program 43 times [2018-09-28 10:00:59,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:59,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:59,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:59,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:59,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:59,808 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:00:59,808 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:00:59,808 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 10:00:59,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:59,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:00,886 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 10:01:00,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:01:00,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-09-28 10:01:00,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-28 10:01:00,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-28 10:01:00,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:01:00,907 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-28 10:01:02,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:02,407 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-28 10:01:02,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-28 10:01:02,407 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-28 10:01:02,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:02,408 INFO L225 Difference]: With dead ends: 50 [2018-09-28 10:01:02,408 INFO L226 Difference]: Without dead ends: 48 [2018-09-28 10:01:02,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:01:02,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-28 10:01:02,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-28 10:01:02,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-28 10:01:02,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-28 10:01:02,414 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-28 10:01:02,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:02,414 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-28 10:01:02,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-28 10:01:02,414 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-28 10:01:02,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-28 10:01:02,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:02,414 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-28 10:01:02,415 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:02,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:02,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1004347965, now seen corresponding path program 44 times [2018-09-28 10:01:02,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:02,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:02,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:02,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:02,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:02,423 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:01:02,423 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:01:02,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:01:02,438 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:01:02,548 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:01:02,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:02,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:03,655 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 10:01:03,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:01:03,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-09-28 10:01:03,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-28 10:01:03,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-28 10:01:03,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 10:01:03,677 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-28 10:01:05,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:05,133 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-28 10:01:05,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:01:05,133 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-28 10:01:05,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:05,134 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:01:05,134 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:01:05,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 10:01:05,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:01:05,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-28 10:01:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-28 10:01:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-28 10:01:05,140 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-28 10:01:05,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:05,140 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-28 10:01:05,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-28 10:01:05,140 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-28 10:01:05,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-28 10:01:05,141 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:05,141 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-28 10:01:05,141 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:05,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:05,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1070014036, now seen corresponding path program 45 times [2018-09-28 10:01:05,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:05,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:05,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:05,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:05,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:05,149 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:01:05,149 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:01:05,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:01:05,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:01:07,734 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-28 10:01:07,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:07,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:08,993 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 10:01:09,013 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:01:09,014 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-09-28 10:01:09,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-28 10:01:09,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-28 10:01:09,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:01:09,015 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-28 10:01:10,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:10,542 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-28 10:01:10,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 10:01:10,542 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-28 10:01:10,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:10,543 INFO L225 Difference]: With dead ends: 52 [2018-09-28 10:01:10,543 INFO L226 Difference]: Without dead ends: 50 [2018-09-28 10:01:10,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:01:10,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-28 10:01:10,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-28 10:01:10,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-28 10:01:10,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-28 10:01:10,547 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-28 10:01:10,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:10,548 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-28 10:01:10,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-28 10:01:10,548 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-28 10:01:10,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-28 10:01:10,548 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:10,549 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-28 10:01:10,549 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:10,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:10,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1189305059, now seen corresponding path program 46 times [2018-09-28 10:01:10,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:10,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:10,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:10,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:10,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:10,557 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:01:10,557 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:01:10,557 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 10:01:10,572 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:01:10,691 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:01:10,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:10,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:12,358 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 10:01:12,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:01:12,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-09-28 10:01:12,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-28 10:01:12,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-28 10:01:12,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-28 10:01:12,379 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-28 10:01:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:14,170 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-28 10:01:14,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:01:14,171 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-28 10:01:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:14,172 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:01:14,172 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:01:14,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-28 10:01:14,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:01:14,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-28 10:01:14,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-28 10:01:14,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-28 10:01:14,177 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-28 10:01:14,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:14,177 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-28 10:01:14,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-28 10:01:14,177 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-28 10:01:14,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-28 10:01:14,178 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:14,178 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-28 10:01:14,178 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:14,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:14,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1786247028, now seen corresponding path program 47 times [2018-09-28 10:01:14,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:14,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:14,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:14,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:14,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:14,187 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:01:14,187 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:01:14,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:01:14,202 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:01:14,374 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-28 10:01:14,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:14,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:15,649 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 10:01:15,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:01:15,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-09-28 10:01:15,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-28 10:01:15,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-28 10:01:15,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:01:15,670 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-28 10:01:17,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:17,354 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-28 10:01:17,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-28 10:01:17,354 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-28 10:01:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:17,355 INFO L225 Difference]: With dead ends: 54 [2018-09-28 10:01:17,356 INFO L226 Difference]: Without dead ends: 52 [2018-09-28 10:01:17,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:01:17,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-28 10:01:17,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-28 10:01:17,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-28 10:01:17,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-28 10:01:17,360 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-28 10:01:17,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:17,361 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-28 10:01:17,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-28 10:01:17,361 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-28 10:01:17,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-28 10:01:17,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:17,361 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-28 10:01:17,362 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:17,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:17,362 INFO L82 PathProgramCache]: Analyzing trace with hash 460918787, now seen corresponding path program 48 times [2018-09-28 10:01:17,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:17,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:17,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:17,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:17,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:17,369 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:01:17,370 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:01:17,370 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 10:01:17,377 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:01:18,071 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-28 10:01:18,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:18,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:19,422 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 10:01:19,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:01:19,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-09-28 10:01:19,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-28 10:01:19,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-28 10:01:19,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-28 10:01:19,444 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-28 10:01:21,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:21,151 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-28 10:01:21,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-28 10:01:21,151 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-28 10:01:21,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:21,152 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:01:21,153 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:01:21,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-28 10:01:21,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:01:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-28 10:01:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-28 10:01:21,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-28 10:01:21,158 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-28 10:01:21,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:21,158 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-28 10:01:21,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-28 10:01:21,158 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-28 10:01:21,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-28 10:01:21,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:21,159 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-28 10:01:21,159 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:21,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:21,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1403582316, now seen corresponding path program 49 times [2018-09-28 10:01:21,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:21,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:21,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:21,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:21,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:21,167 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:01:21,167 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:01:21,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:01:21,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:21,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:22,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:01:22,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-09-28 10:01:22,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-28 10:01:22,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-28 10:01:22,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-28 10:01:22,684 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-28 10:01:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:24,727 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-28 10:01:24,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-28 10:01:24,728 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-28 10:01:24,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:24,729 INFO L225 Difference]: With dead ends: 56 [2018-09-28 10:01:24,729 INFO L226 Difference]: Without dead ends: 54 [2018-09-28 10:01:24,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-28 10:01:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-28 10:01:24,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-28 10:01:24,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-28 10:01:24,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-28 10:01:24,734 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-28 10:01:24,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:24,735 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-28 10:01:24,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-28 10:01:24,735 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-28 10:01:24,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-28 10:01:24,735 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:24,736 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-28 10:01:24,736 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:24,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:24,736 INFO L82 PathProgramCache]: Analyzing trace with hash 561380643, now seen corresponding path program 50 times [2018-09-28 10:01:24,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:24,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:24,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:24,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:24,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:24,744 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:01:24,745 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:01:24,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:01:24,758 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:01:24,891 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:01:24,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:24,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:26,333 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:01:26,333 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-09-28 10:01:26,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-28 10:01:26,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-28 10:01:26,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-28 10:01:26,334 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-28 10:01:28,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:28,431 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-28 10:01:28,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:01:28,431 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-28 10:01:28,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:28,432 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:01:28,432 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:01:28,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-28 10:01:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:01:28,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-28 10:01:28,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-28 10:01:28,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-28 10:01:28,436 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-28 10:01:28,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:28,437 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-28 10:01:28,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-28 10:01:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-28 10:01:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-28 10:01:28,437 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:28,437 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-28 10:01:28,438 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:28,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:28,438 INFO L82 PathProgramCache]: Analyzing trace with hash 222932556, now seen corresponding path program 51 times [2018-09-28 10:01:28,438 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:28,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:28,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:28,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:28,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:28,446 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:01:28,446 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:01:28,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:01:28,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:01:32,847 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-28 10:01:32,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:32,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:34,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:01:34,594 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-09-28 10:01:34,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-28 10:01:34,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-28 10:01:34,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 10:01:34,595 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-28 10:01:36,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:36,531 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-28 10:01:36,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-28 10:01:36,531 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-28 10:01:36,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:36,532 INFO L225 Difference]: With dead ends: 58 [2018-09-28 10:01:36,532 INFO L226 Difference]: Without dead ends: 56 [2018-09-28 10:01:36,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 10:01:36,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-28 10:01:36,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-28 10:01:36,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-28 10:01:36,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-28 10:01:36,538 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-28 10:01:36,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:36,539 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-28 10:01:36,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-28 10:01:36,539 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-28 10:01:36,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-28 10:01:36,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:36,539 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-28 10:01:36,540 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:36,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:36,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1679023549, now seen corresponding path program 52 times [2018-09-28 10:01:36,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:36,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:36,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:36,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:36,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:36,548 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:01:36,548 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:01:36,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:01:36,578 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:01:36,741 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:01:36,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:36,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:38,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:01:38,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-09-28 10:01:38,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-28 10:01:38,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-28 10:01:38,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-28 10:01:38,231 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-28 10:01:40,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:40,480 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-28 10:01:40,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 10:01:40,481 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-28 10:01:40,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:40,482 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:01:40,482 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:01:40,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-28 10:01:40,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:01:40,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-28 10:01:40,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-28 10:01:40,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-28 10:01:40,487 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-28 10:01:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:40,487 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-28 10:01:40,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-28 10:01:40,487 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-28 10:01:40,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-28 10:01:40,488 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:40,488 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-28 10:01:40,488 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:40,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:40,489 INFO L82 PathProgramCache]: Analyzing trace with hash -510120660, now seen corresponding path program 53 times [2018-09-28 10:01:40,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:40,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:40,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:40,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:40,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:40,496 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:01:40,497 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:01:40,497 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-09-28 10:01:40,511 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:01:40,666 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-28 10:01:40,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:40,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:42,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:01:42,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-09-28 10:01:42,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-28 10:01:42,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-28 10:01:42,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:01:42,268 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-28 10:01:44,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:44,596 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-28 10:01:44,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 10:01:44,597 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-28 10:01:44,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:44,598 INFO L225 Difference]: With dead ends: 60 [2018-09-28 10:01:44,598 INFO L226 Difference]: Without dead ends: 58 [2018-09-28 10:01:44,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:01:44,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-28 10:01:44,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-28 10:01:44,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-28 10:01:44,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-28 10:01:44,602 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-28 10:01:44,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:44,603 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-28 10:01:44,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-28 10:01:44,603 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-28 10:01:44,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-28 10:01:44,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:44,603 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-28 10:01:44,603 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:44,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:44,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1366130531, now seen corresponding path program 54 times [2018-09-28 10:01:44,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:44,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:44,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:44,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:44,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:44,611 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:01:44,611 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:01:44,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:01:44,622 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:01:45,980 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-28 10:01:45,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:45,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:47,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:01:47,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-09-28 10:01:47,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-28 10:01:47,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-28 10:01:47,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-28 10:01:47,576 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-28 10:01:49,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:49,892 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-28 10:01:49,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-28 10:01:49,893 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-28 10:01:49,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:49,893 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:01:49,894 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:01:49,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-28 10:01:49,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:01:49,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-28 10:01:49,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-28 10:01:49,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-28 10:01:49,898 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-28 10:01:49,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:49,898 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-28 10:01:49,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-28 10:01:49,898 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-28 10:01:49,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-28 10:01:49,899 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:49,899 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-28 10:01:49,899 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:49,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:49,899 INFO L82 PathProgramCache]: Analyzing trace with hash -599624692, now seen corresponding path program 55 times [2018-09-28 10:01:49,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:49,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:49,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:49,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:49,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:49,907 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:01:49,908 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:01:49,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:01:49,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:50,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:51,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:01:51,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-09-28 10:01:51,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-28 10:01:51,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-28 10:01:51,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:01:51,645 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-28 10:01:54,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:54,029 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-28 10:01:54,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-28 10:01:54,029 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-28 10:01:54,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:54,030 INFO L225 Difference]: With dead ends: 62 [2018-09-28 10:01:54,030 INFO L226 Difference]: Without dead ends: 60 [2018-09-28 10:01:54,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:01:54,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-28 10:01:54,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-28 10:01:54,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-28 10:01:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-28 10:01:54,035 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-28 10:01:54,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:54,035 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-28 10:01:54,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-28 10:01:54,036 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-28 10:01:54,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-28 10:01:54,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:54,036 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-28 10:01:54,036 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:54,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:54,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1408494461, now seen corresponding path program 56 times [2018-09-28 10:01:54,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:54,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:54,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:54,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:54,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:54,045 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:01:54,045 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:01:54,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:01:54,060 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:01:54,183 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:01:54,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:54,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:55,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:01:55,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-09-28 10:01:55,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-28 10:01:55,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-28 10:01:55,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-28 10:01:55,964 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-28 10:01:58,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:58,304 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-28 10:01:58,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:01:58,304 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-28 10:01:58,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:58,305 INFO L225 Difference]: With dead ends: 63 [2018-09-28 10:01:58,305 INFO L226 Difference]: Without dead ends: 61 [2018-09-28 10:01:58,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-28 10:01:58,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-28 10:01:58,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-28 10:01:58,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-28 10:01:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-28 10:01:58,311 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-28 10:01:58,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:58,311 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-28 10:01:58,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-28 10:01:58,312 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-28 10:01:58,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-28 10:01:58,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:58,312 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-28 10:01:58,313 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:58,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:58,313 INFO L82 PathProgramCache]: Analyzing trace with hash -713653524, now seen corresponding path program 57 times [2018-09-28 10:01:58,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:58,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:58,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:58,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:58,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:58,320 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:01:58,321 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:01:58,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:01:58,351 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:02:06,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-28 10:02:06,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:06,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:07,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:02:07,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-09-28 10:02:07,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-28 10:02:07,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-28 10:02:07,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:02:07,726 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-28 10:02:10,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:10,414 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-28 10:02:10,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-28 10:02:10,414 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-28 10:02:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:10,415 INFO L225 Difference]: With dead ends: 64 [2018-09-28 10:02:10,415 INFO L226 Difference]: Without dead ends: 62 [2018-09-28 10:02:10,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:02:10,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-28 10:02:10,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-28 10:02:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-28 10:02:10,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-28 10:02:10,422 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-28 10:02:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:10,422 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-28 10:02:10,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-28 10:02:10,422 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-28 10:02:10,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-28 10:02:10,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:10,423 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-28 10:02:10,423 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:10,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:10,423 INFO L82 PathProgramCache]: Analyzing trace with hash -648420957, now seen corresponding path program 58 times [2018-09-28 10:02:10,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:10,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:10,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:10,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:10,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:10,431 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:02:10,431 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:02:10,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:02:10,445 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:02:10,585 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:02:10,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:10,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:12,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:02:12,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-09-28 10:02:12,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-28 10:02:12,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-28 10:02:12,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-09-28 10:02:12,464 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-28 10:02:15,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:15,145 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-28 10:02:15,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-28 10:02:15,145 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-28 10:02:15,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:15,146 INFO L225 Difference]: With dead ends: 65 [2018-09-28 10:02:15,146 INFO L226 Difference]: Without dead ends: 63 [2018-09-28 10:02:15,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-09-28 10:02:15,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-28 10:02:15,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-28 10:02:15,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-28 10:02:15,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-28 10:02:15,151 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-28 10:02:15,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:15,152 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-28 10:02:15,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-28 10:02:15,152 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-28 10:02:15,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-28 10:02:15,152 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:15,152 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-28 10:02:15,152 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:15,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:15,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1373788620, now seen corresponding path program 59 times [2018-09-28 10:02:15,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:15,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:15,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:15,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:15,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:15,160 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:02:15,161 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:02:15,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-09-28 10:02:15,176 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:02:15,385 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-28 10:02:15,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:15,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:18,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:02:18,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-09-28 10:02:18,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-28 10:02:18,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-28 10:02:18,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:02:18,067 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-28 10:02:20,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:20,786 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-28 10:02:20,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-28 10:02:20,786 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-28 10:02:20,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:20,787 INFO L225 Difference]: With dead ends: 66 [2018-09-28 10:02:20,787 INFO L226 Difference]: Without dead ends: 64 [2018-09-28 10:02:20,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:02:20,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-28 10:02:20,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-28 10:02:20,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-28 10:02:20,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-28 10:02:20,792 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-28 10:02:20,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:20,792 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-28 10:02:20,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-28 10:02:20,792 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-28 10:02:20,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-28 10:02:20,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:20,793 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-28 10:02:20,793 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:20,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:20,793 INFO L82 PathProgramCache]: Analyzing trace with hash -362223933, now seen corresponding path program 60 times [2018-09-28 10:02:20,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:20,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:20,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:20,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:20,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:20,801 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:02:20,801 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:02:20,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:02:20,817 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:02:22,684 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-28 10:02:22,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:22,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:24,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:02:24,846 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-09-28 10:02:24,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-28 10:02:24,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-28 10:02:24,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-28 10:02:24,847 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-28 10:02:27,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:27,520 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-28 10:02:27,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-28 10:02:27,521 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-28 10:02:27,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:27,522 INFO L225 Difference]: With dead ends: 67 [2018-09-28 10:02:27,522 INFO L226 Difference]: Without dead ends: 65 [2018-09-28 10:02:27,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-28 10:02:27,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-28 10:02:27,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-28 10:02:27,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-28 10:02:27,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-28 10:02:27,526 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-28 10:02:27,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:27,526 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-28 10:02:27,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-28 10:02:27,526 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-28 10:02:27,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-28 10:02:27,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:27,527 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-28 10:02:27,527 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:27,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:27,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1655961772, now seen corresponding path program 61 times [2018-09-28 10:02:27,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:27,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:27,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:27,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:27,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:27,534 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:02:27,534 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:02:27,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:02:27,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:02:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:27,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:29,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:02:29,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-09-28 10:02:29,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-28 10:02:29,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-28 10:02:29,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 10:02:29,836 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-28 10:02:32,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:32,621 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-28 10:02:32,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-28 10:02:32,622 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-28 10:02:32,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:32,622 INFO L225 Difference]: With dead ends: 68 [2018-09-28 10:02:32,623 INFO L226 Difference]: Without dead ends: 66 [2018-09-28 10:02:32,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 10:02:32,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-28 10:02:32,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-28 10:02:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-28 10:02:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-28 10:02:32,627 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-28 10:02:32,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:32,627 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-28 10:02:32,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-28 10:02:32,627 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-28 10:02:32,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-28 10:02:32,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:32,628 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-28 10:02:32,628 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:32,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:32,628 INFO L82 PathProgramCache]: Analyzing trace with hash -204790813, now seen corresponding path program 62 times [2018-09-28 10:02:32,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:32,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:32,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:32,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:02:32,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:32,636 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:02:32,636 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:02:32,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:02:32,655 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:02:32,816 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:02:32,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:32,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:35,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:02:35,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-09-28 10:02:35,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-28 10:02:35,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-28 10:02:35,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 10:02:35,065 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-28 10:02:37,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:37,888 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-28 10:02:37,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-28 10:02:37,888 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-28 10:02:37,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:37,889 INFO L225 Difference]: With dead ends: 69 [2018-09-28 10:02:37,889 INFO L226 Difference]: Without dead ends: 67 [2018-09-28 10:02:37,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 10:02:37,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-28 10:02:37,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-28 10:02:37,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-28 10:02:37,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-28 10:02:37,895 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-28 10:02:37,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:37,895 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-28 10:02:37,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-28 10:02:37,895 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-28 10:02:37,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-28 10:02:37,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:37,896 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-28 10:02:37,896 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:37,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:37,896 INFO L82 PathProgramCache]: Analyzing trace with hash -2053546100, now seen corresponding path program 63 times [2018-09-28 10:02:37,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:37,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:37,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:37,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:37,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:37,904 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:02:37,904 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:02:37,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:02:37,919 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:02:50,622 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-28 10:02:50,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:50,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:52,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:02:52,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-09-28 10:02:52,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-28 10:02:52,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-28 10:02:52,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 10:02:52,683 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-28 10:02:55,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:55,901 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-28 10:02:55,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-28 10:02:55,901 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-28 10:02:55,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:55,902 INFO L225 Difference]: With dead ends: 70 [2018-09-28 10:02:55,902 INFO L226 Difference]: Without dead ends: 68 [2018-09-28 10:02:55,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 10:02:55,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-28 10:02:55,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-28 10:02:55,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-28 10:02:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-28 10:02:55,908 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-28 10:02:55,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:55,908 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-28 10:02:55,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-28 10:02:55,908 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-28 10:02:55,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-28 10:02:55,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:55,909 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-28 10:02:55,909 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:55,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:55,909 INFO L82 PathProgramCache]: Analyzing trace with hash 764582147, now seen corresponding path program 64 times [2018-09-28 10:02:55,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:55,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:55,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:55,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:55,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:55,917 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:02:55,917 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:02:55,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:02:55,931 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:02:56,126 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:02:56,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:56,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:58,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:02:58,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-09-28 10:02:58,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-28 10:02:58,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-28 10:02:58,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-28 10:02:58,332 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-28 10:03:01,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:01,541 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-28 10:03:01,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-28 10:03:01,541 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-28 10:03:01,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:01,542 INFO L225 Difference]: With dead ends: 71 [2018-09-28 10:03:01,542 INFO L226 Difference]: Without dead ends: 69 [2018-09-28 10:03:01,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-28 10:03:01,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-28 10:03:01,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-28 10:03:01,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-28 10:03:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-28 10:03:01,547 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-28 10:03:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:01,548 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-28 10:03:01,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-28 10:03:01,548 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-28 10:03:01,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-28 10:03:01,548 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:01,548 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-28 10:03:01,549 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:01,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:01,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2067755412, now seen corresponding path program 65 times [2018-09-28 10:03:01,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:01,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:01,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:01,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:01,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:01,555 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:03:01,555 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:03:01,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:03:01,563 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:03:01,831 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-28 10:03:01,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:01,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:04,094 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:03:04,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-09-28 10:03:04,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-28 10:03:04,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-28 10:03:04,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:03:04,095 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-28 10:03:07,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:07,327 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-28 10:03:07,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-28 10:03:07,327 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-28 10:03:07,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:07,328 INFO L225 Difference]: With dead ends: 72 [2018-09-28 10:03:07,329 INFO L226 Difference]: Without dead ends: 70 [2018-09-28 10:03:07,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:03:07,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-28 10:03:07,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-28 10:03:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-28 10:03:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-28 10:03:07,334 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-28 10:03:07,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:07,335 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-28 10:03:07,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-28 10:03:07,335 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-28 10:03:07,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-28 10:03:07,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:07,335 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-28 10:03:07,336 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:07,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:07,336 INFO L82 PathProgramCache]: Analyzing trace with hash 324093475, now seen corresponding path program 66 times [2018-09-28 10:03:07,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:07,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:07,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:07,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:07,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:07,342 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:03:07,342 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:03:07,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:03:07,349 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:03:10,708 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-28 10:03:10,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:10,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:14,283 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:03:14,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-09-28 10:03:14,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-28 10:03:14,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-28 10:03:14,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-28 10:03:14,285 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-28 10:03:17,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:17,643 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-28 10:03:17,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-28 10:03:17,644 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-28 10:03:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:17,645 INFO L225 Difference]: With dead ends: 73 [2018-09-28 10:03:17,645 INFO L226 Difference]: Without dead ends: 71 [2018-09-28 10:03:17,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-28 10:03:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-28 10:03:17,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-28 10:03:17,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-28 10:03:17,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-28 10:03:17,650 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-28 10:03:17,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:17,650 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-28 10:03:17,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-28 10:03:17,650 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-28 10:03:17,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-28 10:03:17,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:17,651 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-28 10:03:17,651 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:17,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:17,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1456964940, now seen corresponding path program 67 times [2018-09-28 10:03:17,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:17,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:17,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:17,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:17,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:17,659 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:03:17,659 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:03:17,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:03:17,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:17,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:20,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:03:20,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-09-28 10:03:20,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-28 10:03:20,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-28 10:03:20,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:03:20,575 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-28 10:03:25,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:25,292 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-28 10:03:25,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-28 10:03:25,300 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-28 10:03:25,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:25,300 INFO L225 Difference]: With dead ends: 74 [2018-09-28 10:03:25,300 INFO L226 Difference]: Without dead ends: 72 [2018-09-28 10:03:25,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:03:25,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-28 10:03:25,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-28 10:03:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-28 10:03:25,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-28 10:03:25,304 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-28 10:03:25,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:25,304 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-28 10:03:25,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-28 10:03:25,304 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-28 10:03:25,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-28 10:03:25,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:25,305 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-28 10:03:25,305 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:25,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:25,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2078725309, now seen corresponding path program 68 times [2018-09-28 10:03:25,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:25,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:25,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:25,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:25,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:25,311 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:03:25,312 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:03:25,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:03:25,319 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:03:25,535 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:03:25,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:25,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:28,298 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:03:28,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-09-28 10:03:28,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-28 10:03:28,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-28 10:03:28,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-09-28 10:03:28,300 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-28 10:03:31,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:31,930 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-28 10:03:31,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 10:03:31,930 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-28 10:03:31,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:31,931 INFO L225 Difference]: With dead ends: 75 [2018-09-28 10:03:31,931 INFO L226 Difference]: Without dead ends: 73 [2018-09-28 10:03:31,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-09-28 10:03:31,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-28 10:03:31,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-28 10:03:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-28 10:03:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-28 10:03:31,936 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-28 10:03:31,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:31,936 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-28 10:03:31,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-28 10:03:31,936 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-28 10:03:31,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-28 10:03:31,937 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:31,937 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-28 10:03:31,937 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:31,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:31,937 INFO L82 PathProgramCache]: Analyzing trace with hash -15973332, now seen corresponding path program 69 times [2018-09-28 10:03:31,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:31,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:31,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:31,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:31,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:31,945 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:03:31,946 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:03:31,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:03:31,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:03:52,040 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-28 10:03:52,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:52,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:54,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:03:54,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-09-28 10:03:54,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-28 10:03:54,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-28 10:03:54,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:03:54,607 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-28 10:03:58,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:58,630 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-28 10:03:58,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-28 10:03:58,630 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-28 10:03:58,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:58,631 INFO L225 Difference]: With dead ends: 76 [2018-09-28 10:03:58,631 INFO L226 Difference]: Without dead ends: 74 [2018-09-28 10:03:58,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:03:58,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-28 10:03:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-28 10:03:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-28 10:03:58,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-28 10:03:58,639 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-28 10:03:58,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:58,639 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-28 10:03:58,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-28 10:03:58,639 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-28 10:03:58,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-28 10:03:58,640 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:58,640 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-28 10:03:58,640 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:58,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:58,640 INFO L82 PathProgramCache]: Analyzing trace with hash -495171485, now seen corresponding path program 70 times [2018-09-28 10:03:58,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:58,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:58,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:58,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:58,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:58,650 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:03:58,650 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:03:58,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:03:58,666 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:03:59,046 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:03:59,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:59,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:01,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:04:01,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-09-28 10:04:01,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-28 10:04:01,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-28 10:04:01,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-09-28 10:04:01,664 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-28 10:04:05,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:05,442 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-28 10:04:05,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-28 10:04:05,442 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-28 10:04:05,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:05,443 INFO L225 Difference]: With dead ends: 77 [2018-09-28 10:04:05,443 INFO L226 Difference]: Without dead ends: 75 [2018-09-28 10:04:05,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-09-28 10:04:05,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-28 10:04:05,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-28 10:04:05,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-28 10:04:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-28 10:04:05,449 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-28 10:04:05,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:05,449 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-28 10:04:05,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-28 10:04:05,449 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-28 10:04:05,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-28 10:04:05,450 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:05,450 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-28 10:04:05,450 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:05,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:05,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1829554956, now seen corresponding path program 71 times [2018-09-28 10:04:05,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:05,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:05,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:05,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:05,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:05,459 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:04:05,459 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:04:05,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:04:05,472 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:04:05,812 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-28 10:04:05,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:05,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:08,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-28 10:04:08,632 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-09-28 10:04:08,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-28 10:04:08,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-28 10:04:08,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 10:04:08,633 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-28 10:04:12,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:12,487 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-28 10:04:12,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-28 10:04:12,488 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-28 10:04:12,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:12,489 INFO L225 Difference]: With dead ends: 78 [2018-09-28 10:04:12,489 INFO L226 Difference]: Without dead ends: 76 [2018-09-28 10:04:12,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 10:04:12,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-28 10:04:12,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-28 10:04:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-28 10:04:12,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-28 10:04:12,495 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-28 10:04:12,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:12,496 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-28 10:04:12,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-28 10:04:12,496 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-28 10:04:12,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-28 10:04:12,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:12,497 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-28 10:04:12,497 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:12,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:12,497 INFO L82 PathProgramCache]: Analyzing trace with hash 881630595, now seen corresponding path program 72 times [2018-09-28 10:04:12,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:12,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:12,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:12,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:12,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:12,505 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-28 10:04:12,506 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-28 10:04:12,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:04:12,520 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:04:16,895 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-28 10:04:16,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:16,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-28 10:04:18,506 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-28 10:04:18,707 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-28 10:04:18,707 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:04:18,714 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:04:18,714 INFO L202 PluginConnector]: Adding new model gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:04:18 BoogieIcfgContainer [2018-09-28 10:04:18,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:04:18,715 INFO L168 Benchmark]: Toolchain (without parser) took 257097.02 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 57.1 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 406.4 MB). Peak memory consumption was 463.5 MB. Max. memory is 7.1 GB. [2018-09-28 10:04:18,717 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:04:18,717 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.49 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 10:04:18,718 INFO L168 Benchmark]: Boogie Preprocessor took 23.95 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 10:04:18,718 INFO L168 Benchmark]: RCFGBuilder took 305.48 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:04:18,718 INFO L168 Benchmark]: TraceAbstraction took 256717.74 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 57.1 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 385.2 MB). Peak memory consumption was 442.4 MB. Max. memory is 7.1 GB. [2018-09-28 10:04:18,721 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.49 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 23.95 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 305.48 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 256717.74 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 57.1 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 385.2 MB). Peak memory consumption was 442.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 46). Cancelled while BasicCegarLoop was analyzing trace of length 76 with TraceHistMax 72, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 52 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 256.6s OverallTime, 73 OverallIterations, 72 TraceHistogramMax, 101.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 216 SDtfs, 0 SDslu, 2628 SDs, 0 SdLazy, 132276 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 84.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2700 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2628 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=72, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 72 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 62.4s SatisfiabilityAnalysisTime, 82.0s InterpolantComputationTime, 2772 NumberOfCodeBlocks, 2772 NumberOfCodeBlocksAsserted, 750 NumberOfCheckSat, 2700 ConstructedInterpolants, 0 QuantifiedInterpolants, 919171 SizeOfPredicates, 215 NumberOfNonLiveVariables, 14148 ConjunctsInSsa, 10653 ConjunctsInUnsatCore, 72 InterpolantComputations, 1 PerfectInterpolantSequences, 0/62196 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/gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-04-18-735.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-04-18-735.csv Completed graceful shutdown