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/20170304-DifficultPathPrograms/gauss_sum.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:33:17,906 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:33:17,909 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:33:17,924 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:33:17,924 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:33:17,926 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:33:17,928 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:33:17,930 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:33:17,932 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:33:17,933 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:33:17,936 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 23:33:17,966 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 [2018-09-30 23:33:17,993 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:33:17,993 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:33:17,994 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:33:17,994 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:33:17,995 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:33:17,995 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:33:17,995 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:33:17,995 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:33:17,995 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:33:17,996 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:33:17,996 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:33:17,996 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:33:17,996 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:33:17,996 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:33:17,997 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:33:17,997 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:33:17,997 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:33:17,997 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:33:17,997 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:33:17,998 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:33:17,998 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:33:17,998 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:33:17,998 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:33:17,998 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:33:17,998 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:33:17,999 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:33:17,999 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:33:17,999 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:33:17,999 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:33:17,999 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:33:18,045 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:33:18,061 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:33:18,067 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:33:18,069 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:33:18,070 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:33:18,071 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/gauss_sum.i_3.bpl [2018-09-30 23:33:18,071 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/gauss_sum.i_3.bpl' [2018-09-30 23:33:18,118 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:33:18,121 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:33:18,122 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:33:18,122 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:33:18,122 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:33:18,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:33:18" (1/1) ... [2018-09-30 23:33:18,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:33:18" (1/1) ... [2018-09-30 23:33:18,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:33:18,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:33:18,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:33:18,162 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:33:18,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:33:18" (1/1) ... [2018-09-30 23:33:18,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:33:18" (1/1) ... [2018-09-30 23:33:18,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:33:18" (1/1) ... [2018-09-30 23:33:18,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:33:18" (1/1) ... [2018-09-30 23:33:18,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:33:18" (1/1) ... [2018-09-30 23:33:18,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:33:18" (1/1) ... [2018-09-30 23:33:18,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:33:18" (1/1) ... [2018-09-30 23:33:18,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:33:18,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:33:18,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:33:18,182 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:33:18,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:33:18" (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 [2018-09-30 23:33:18,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 23:33:18,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 23:33:18,498 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 23:33:18,499 INFO L202 PluginConnector]: Adding new model gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:33:18 BoogieIcfgContainer [2018-09-30 23:33:18,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:33:18,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:33:18,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:33:18,504 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:33:18,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:33:18" (1/2) ... [2018-09-30 23:33:18,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff97969 and model type gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:33:18, skipping insertion in model container [2018-09-30 23:33:18,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gauss_sum.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:33:18" (2/2) ... [2018-09-30 23:33:18,508 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum.i_3.bpl [2018-09-30 23:33:18,518 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:33:18,529 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:33:18,576 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:33:18,577 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:33:18,577 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:33:18,577 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:33:18,577 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:33:18,578 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:33:18,578 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:33:18,578 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:33:18,578 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:33:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 23:33:18,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 23:33:18,597 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:18,598 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 23:33:18,599 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:18,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:18,606 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 23:33:18,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:18,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:18,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:18,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:18,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:18,681 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:18,681 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:18,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:33:18,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:18,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:18,897 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:33:18,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 23:33:18,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:33:18,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:33:18,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:33:18,920 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 23:33:18,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:18,959 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 23:33:18,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:33:18,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 23:33:18,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:18,972 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:33:18,972 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 23:33:18,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:33:18,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 23:33:19,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 23:33:19,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 23:33:19,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 23:33:19,009 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 23:33:19,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:19,009 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 23:33:19,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:33:19,010 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 23:33:19,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:33:19,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:19,011 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 23:33:19,011 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:19,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:19,011 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-30 23:33:19,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:19,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:19,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:19,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:19,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:19,021 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:19,021 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:19,021 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 [2018-09-30 23:33:19,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:19,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:19,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:19,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-09-30 23:33:19,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:33:19,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:33:19,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:33:19,199 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-30 23:33:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:19,270 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 23:33:19,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:33:19,273 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 23:33:19,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:19,273 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:33:19,274 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 23:33:19,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:33:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 23:33:19,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 23:33:19,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 23:33:19,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 23:33:19,280 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 23:33:19,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:19,281 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 23:33:19,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:33:19,281 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 23:33:19,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:33:19,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:19,282 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-30 23:33:19,282 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:19,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:19,282 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-30 23:33:19,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:19,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:19,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:19,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:19,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:19,294 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:19,295 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:19,295 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:33:19,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:33:19,331 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:33:19,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:19,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:19,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:19,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-09-30 23:33:19,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:33:19,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:33:19,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:33:19,464 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-30 23:33:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:19,538 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 23:33:19,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:33:19,538 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 23:33:19,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:19,539 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:33:19,539 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 23:33:19,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:33:19,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 23:33:19,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 23:33:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:33:19,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 23:33:19,544 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 23:33:19,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:19,545 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 23:33:19,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:33:19,545 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 23:33:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:33:19,546 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:19,546 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-30 23:33:19,546 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:19,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:19,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-30 23:33:19,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:19,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:19,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:19,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:19,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:19,556 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:19,557 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:19,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:33:19,572 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:33:19,588 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 23:33:19,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:19,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:19,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:19,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-09-30 23:33:19,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:33:19,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:33:19,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:33:19,793 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-30 23:33:19,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:19,951 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 23:33:19,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:33:19,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 23:33:19,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:19,953 INFO L225 Difference]: With dead ends: 15 [2018-09-30 23:33:19,953 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 23:33:19,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:33:19,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 23:33:19,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 23:33:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 23:33:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 23:33:19,962 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 23:33:19,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:19,963 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 23:33:19,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:33:19,963 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 23:33:19,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:33:19,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:19,965 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-30 23:33:19,965 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:19,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:19,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-30 23:33:19,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:19,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:19,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:19,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:19,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:19,981 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:19,981 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:19,982 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 [2018-09-30 23:33:19,996 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:33:20,043 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:33:20,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:20,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:20,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:20,291 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-09-30 23:33:20,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:33:20,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:33:20,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:33:20,293 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-30 23:33:20,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:20,389 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 23:33:20,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:33:20,389 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-30 23:33:20,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:20,390 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:33:20,390 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 23:33:20,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:33:20,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 23:33:20,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 23:33:20,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 23:33:20,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 23:33:20,397 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 23:33:20,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:20,397 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 23:33:20,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:33:20,398 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 23:33:20,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:33:20,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:20,398 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-30 23:33:20,399 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:20,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:20,399 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-30 23:33:20,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:20,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:20,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:20,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:20,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:20,409 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:20,409 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:20,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:33:20,417 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:33:20,432 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 23:33:20,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:20,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:20,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:20,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-09-30 23:33:20,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:33:20,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:33:20,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:33:20,625 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-30 23:33:20,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:20,925 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 23:33:20,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:33:20,926 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 23:33:20,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:20,927 INFO L225 Difference]: With dead ends: 19 [2018-09-30 23:33:20,927 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 23:33:20,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:33:20,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 23:33:20,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 23:33:20,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 23:33:20,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 23:33:20,932 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 23:33:20,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:20,933 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 23:33:20,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:33:20,933 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 23:33:20,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:33:20,934 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:20,934 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-30 23:33:20,934 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:20,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:20,935 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-30 23:33:20,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:20,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:20,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:20,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:20,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:20,946 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:20,946 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:20,947 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 [2018-09-30 23:33:20,961 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:33:20,981 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:33:20,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:20,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:21,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:21,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-09-30 23:33:21,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:33:21,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:33:21,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:33:21,180 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-30 23:33:21,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:21,315 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 23:33:21,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:33:21,319 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 23:33:21,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:21,320 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:33:21,320 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:33:21,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:33:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:33:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 23:33:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:33:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 23:33:21,325 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 23:33:21,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:21,326 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 23:33:21,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:33:21,326 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 23:33:21,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:33:21,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:21,327 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-30 23:33:21,327 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:21,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:21,327 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-30 23:33:21,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:21,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:21,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:21,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:21,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:21,338 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:21,339 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:21,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:33:21,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:21,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:21,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:21,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-09-30 23:33:21,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:33:21,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:33:21,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:33:21,565 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-30 23:33:21,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:21,673 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 23:33:21,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:33:21,675 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 23:33:21,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:21,676 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:33:21,676 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:33:21,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:33:21,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:33:21,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 23:33:21,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:33:21,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 23:33:21,682 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-30 23:33:21,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:21,682 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 23:33:21,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:33:21,683 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 23:33:21,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:33:21,683 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:21,684 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-30 23:33:21,684 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:21,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:21,684 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-30 23:33:21,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:21,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:21,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:21,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:21,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:21,696 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:21,697 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:21,697 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 [2018-09-30 23:33:21,719 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:33:21,734 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:33:21,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:21,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:21,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:21,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-09-30 23:33:21,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:33:21,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:33:21,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:33:21,998 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-30 23:33:22,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:22,172 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 23:33:22,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:33:22,173 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-30 23:33:22,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:22,174 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:33:22,174 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:33:22,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:33:22,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:33:22,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 23:33:22,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:33:22,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 23:33:22,179 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-30 23:33:22,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:22,180 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 23:33:22,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:33:22,180 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 23:33:22,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:33:22,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:22,181 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-30 23:33:22,181 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:22,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:22,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-30 23:33:22,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:22,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:22,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:22,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:22,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:22,194 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:22,195 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:22,195 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 [2018-09-30 23:33:22,206 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:33:22,229 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 23:33:22,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:22,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:22,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:22,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-09-30 23:33:22,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:33:22,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:33:22,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:33:22,465 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-30 23:33:22,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:22,617 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 23:33:22,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:33:22,618 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-30 23:33:22,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:22,619 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:33:22,619 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:33:22,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:33:22,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:33:22,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 23:33:22,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:33:22,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 23:33:22,628 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-30 23:33:22,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:22,628 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 23:33:22,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:33:22,628 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 23:33:22,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:33:22,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:22,629 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-30 23:33:22,629 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:22,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:22,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-30 23:33:22,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:22,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:22,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:22,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:22,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:22,642 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:22,643 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:22,643 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 [2018-09-30 23:33:22,659 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:33:22,678 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:33:22,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:22,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:22,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:22,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-09-30 23:33:22,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:33:22,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:33:22,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:33:22,996 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-30 23:33:23,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:23,272 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 23:33:23,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:33:23,273 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-30 23:33:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:23,274 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:33:23,274 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:33:23,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:33:23,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:33:23,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 23:33:23,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:33:23,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 23:33:23,280 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-30 23:33:23,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:23,281 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 23:33:23,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:33:23,281 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 23:33:23,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:33:23,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:23,282 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-30 23:33:23,282 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:23,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:23,283 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-30 23:33:23,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:23,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:23,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:23,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:23,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:23,294 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:23,294 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:23,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:33:23,304 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:33:23,326 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 23:33:23,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:23,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:23,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:23,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-09-30 23:33:23,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:33:23,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:33:23,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:33:23,817 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-30 23:33:23,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:23,960 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 23:33:23,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:33:23,961 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-30 23:33:23,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:23,962 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:33:23,962 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:33:23,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:33:23,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:33:23,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 23:33:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 23:33:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 23:33:23,968 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-30 23:33:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:23,969 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 23:33:23,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:33:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 23:33:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 23:33:23,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:23,970 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-30 23:33:23,970 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:23,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:23,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-30 23:33:23,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:23,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:23,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:23,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:23,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:23,982 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:23,983 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:23,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:33:24,000 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:33:24,032 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 23:33:24,032 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:24,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:24,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:24,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-09-30 23:33:24,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:33:24,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:33:24,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:33:24,279 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-30 23:33:24,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:24,681 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 23:33:24,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:33:24,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-30 23:33:24,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:24,683 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:33:24,683 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:33:24,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:33:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:33:24,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 23:33:24,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:33:24,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 23:33:24,690 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-30 23:33:24,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:24,691 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 23:33:24,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:33:24,691 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 23:33:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:33:24,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:24,692 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-30 23:33:24,692 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:24,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:24,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-30 23:33:24,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:24,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:24,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:24,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:24,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:24,704 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:24,704 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:24,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:33:24,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:24,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:26,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:26,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-09-30 23:33:26,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:33:26,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:33:26,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:33:26,116 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-30 23:33:26,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:26,406 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 23:33:26,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:33:26,407 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-30 23:33:26,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:26,407 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:33:26,407 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:33:26,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:33:26,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:33:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 23:33:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 23:33:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 23:33:26,415 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-30 23:33:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:26,415 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 23:33:26,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:33:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 23:33:26,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:33:26,418 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:26,418 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-30 23:33:26,419 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:26,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:26,419 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-30 23:33:26,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:26,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:26,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:26,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:26,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:26,442 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:26,443 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:26,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:33:26,465 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:33:26,489 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:33:26,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:26,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:27,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:27,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-09-30 23:33:27,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:33:27,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:33:27,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:33:27,016 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-30 23:33:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:27,285 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 23:33:27,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:33:27,286 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-30 23:33:27,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:27,289 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:33:27,289 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:33:27,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:33:27,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:33:27,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 23:33:27,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:33:27,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 23:33:27,294 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-30 23:33:27,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:27,295 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 23:33:27,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:33:27,295 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 23:33:27,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:33:27,296 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:27,296 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-30 23:33:27,296 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:27,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:27,296 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-30 23:33:27,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:27,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:27,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:27,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:27,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:27,308 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:27,308 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:27,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:33:27,332 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:33:27,386 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 23:33:27,386 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:27,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:27,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:27,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-09-30 23:33:27,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:33:27,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:33:27,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:33:27,731 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-30 23:33:27,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:27,956 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 23:33:27,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:33:27,959 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-30 23:33:27,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:27,959 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:33:27,959 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:33:27,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:33:27,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:33:27,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 23:33:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:33:27,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 23:33:27,965 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-30 23:33:27,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:27,966 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 23:33:27,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:33:27,966 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 23:33:27,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 23:33:27,967 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:27,967 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-30 23:33:27,967 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:27,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:27,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-30 23:33:27,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:27,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:27,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:27,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:27,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:27,979 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:27,979 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:27,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:33:28,000 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:33:28,028 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:33:28,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:28,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:28,381 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:28,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-09-30 23:33:28,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:33:28,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:33:28,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:33:28,382 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-30 23:33:28,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:28,648 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 23:33:28,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:33:28,649 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-30 23:33:28,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:28,650 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:33:28,650 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:33:28,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:33:28,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:33:28,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 23:33:28,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 23:33:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 23:33:28,657 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-30 23:33:28,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:28,657 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 23:33:28,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:33:28,657 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 23:33:28,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:33:28,658 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:28,658 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-30 23:33:28,658 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:28,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:28,659 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-30 23:33:28,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:28,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:28,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:28,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:28,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:28,669 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:28,669 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:28,669 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 [2018-09-30 23:33:28,685 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:33:28,721 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 23:33:28,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:28,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:29,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:29,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-09-30 23:33:29,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:33:29,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:33:29,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:33:29,174 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-30 23:33:29,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:29,644 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 23:33:29,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:33:29,644 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-30 23:33:29,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:29,645 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:33:29,645 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:33:29,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:33:29,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:33:29,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 23:33:29,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:33:29,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 23:33:29,652 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-30 23:33:29,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:29,652 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 23:33:29,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:33:29,652 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 23:33:29,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:33:29,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:29,653 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-30 23:33:29,653 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:29,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:29,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-30 23:33:29,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:29,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:29,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:29,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:29,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:29,663 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:29,663 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:29,663 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 [2018-09-30 23:33:29,677 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:33:29,728 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 23:33:29,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:29,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:30,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:30,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-09-30 23:33:30,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:33:30,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:33:30,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:33:30,073 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-30 23:33:30,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:30,850 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 23:33:30,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:33:30,851 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-30 23:33:30,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:30,852 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:33:30,852 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:33:30,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:33:30,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:33:30,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 23:33:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:33:30,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 23:33:30,858 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-30 23:33:30,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:30,859 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 23:33:30,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:33:30,859 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 23:33:30,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:33:30,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:30,860 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-30 23:33:30,860 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:30,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:30,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-30 23:33:30,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:30,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:30,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:30,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:30,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:30,870 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:30,870 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:30,870 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 [2018-09-30 23:33:30,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:30,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:31,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:31,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-09-30 23:33:31,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:33:31,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:33:31,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:33:31,342 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-30 23:33:31,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:31,847 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 23:33:31,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:33:31,847 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-30 23:33:31,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:31,848 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:33:31,848 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:33:31,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:33:31,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:33:31,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 23:33:31,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:33:31,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 23:33:31,858 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-30 23:33:31,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:31,859 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 23:33:31,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:33:31,859 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 23:33:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:33:31,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:31,860 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-30 23:33:31,860 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:31,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:31,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-30 23:33:31,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:31,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:31,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:31,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:31,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:31,869 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:31,869 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:31,870 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 [2018-09-30 23:33:31,894 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:33:31,924 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:33:31,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:31,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:32,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:32,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-09-30 23:33:32,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:33:32,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:33:32,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:33:32,262 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-30 23:33:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:32,664 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 23:33:32,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:33:32,665 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-30 23:33:32,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:32,665 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:33:32,666 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:33:32,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:33:32,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:33:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 23:33:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:33:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 23:33:32,673 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-30 23:33:32,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:32,673 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 23:33:32,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:33:32,673 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 23:33:32,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:33:32,674 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:32,674 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-30 23:33:32,675 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:32,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:32,675 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-30 23:33:32,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:32,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:32,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:32,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:32,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:32,684 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:32,685 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:32,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:33:32,706 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:33:32,880 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 23:33:32,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:32,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:33,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:33,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-09-30 23:33:33,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:33:33,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:33:33,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:33:33,452 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-30 23:33:33,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:33,820 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 23:33:33,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:33:33,823 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-30 23:33:33,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:33,824 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:33:33,824 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:33:33,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:33:33,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:33:33,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 23:33:33,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 23:33:33,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 23:33:33,829 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-30 23:33:33,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:33,829 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 23:33:33,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:33:33,830 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 23:33:33,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 23:33:33,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:33,830 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-30 23:33:33,830 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:33,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:33,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-30 23:33:33,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:33,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:33,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:33,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:33,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:33,840 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:33,840 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:33,840 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 [2018-09-30 23:33:33,863 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:33:33,903 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:33:33,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:33,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:34,338 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:34,338 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-09-30 23:33:34,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:33:34,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:33:34,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:33:34,339 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-30 23:33:34,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:34,766 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 23:33:34,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:33:34,766 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-30 23:33:34,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:34,767 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:33:34,767 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:33:34,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:33:34,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:33:34,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 23:33:34,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:33:34,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 23:33:34,775 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-30 23:33:34,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:34,775 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 23:33:34,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:33:34,775 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 23:33:34,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:33:34,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:34,776 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-30 23:33:34,776 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:34,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:34,777 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-30 23:33:34,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:34,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:34,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:34,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:34,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:34,785 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:34,785 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:34,785 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 [2018-09-30 23:33:34,797 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:33:34,845 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 23:33:34,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:34,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:35,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:35,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-09-30 23:33:35,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:33:35,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:33:35,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:33:35,265 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-30 23:33:35,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:35,774 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 23:33:35,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:33:35,775 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-30 23:33:35,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:35,775 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:33:35,776 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:33:35,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:33:35,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:33:35,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 23:33:35,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 23:33:35,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 23:33:35,781 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-30 23:33:35,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:35,781 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 23:33:35,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:33:35,781 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 23:33:35,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:33:35,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:35,782 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-30 23:33:35,782 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:35,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:35,782 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-30 23:33:35,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:35,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:35,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:35,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:35,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:35,789 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:35,790 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:35,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:33:35,805 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:33:35,895 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 23:33:35,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:35,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:36,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:36,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-09-30 23:33:36,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 23:33:36,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 23:33:36,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:33:36,482 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-30 23:33:37,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:37,082 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 23:33:37,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:33:37,083 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-30 23:33:37,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:37,083 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:33:37,083 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:33:37,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:33:37,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:33:37,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 23:33:37,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 23:33:37,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 23:33:37,091 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-30 23:33:37,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:37,092 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 23:33:37,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 23:33:37,092 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 23:33:37,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 23:33:37,093 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:37,093 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-30 23:33:37,093 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:37,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:37,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-30 23:33:37,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:37,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:37,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:37,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:37,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:37,108 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:37,108 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:37,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-09-30 23:33:37,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:33:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:37,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:37,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:37,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-09-30 23:33:37,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:33:37,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:33:37,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:33:37,646 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-30 23:33:38,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:38,209 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 23:33:38,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:33:38,209 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-30 23:33:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:38,210 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:33:38,210 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:33:38,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:33:38,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:33:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 23:33:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 23:33:38,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 23:33:38,216 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-30 23:33:38,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:38,216 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 23:33:38,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:33:38,216 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 23:33:38,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 23:33:38,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:38,216 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-30 23:33:38,217 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:38,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:38,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-30 23:33:38,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:38,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:38,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:38,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:38,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:38,224 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:38,225 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:38,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:33:38,242 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:33:38,284 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:33:38,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:38,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:38,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:38,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-09-30 23:33:38,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:33:38,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:33:38,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:33:38,773 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-30 23:33:39,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:39,451 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 23:33:39,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:33:39,451 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-30 23:33:39,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:39,452 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:33:39,452 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:33:39,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:33:39,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:33:39,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 23:33:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 23:33:39,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 23:33:39,458 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-30 23:33:39,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:39,459 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 23:33:39,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:33:39,459 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 23:33:39,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 23:33:39,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:39,459 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-30 23:33:39,460 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:39,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:39,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-30 23:33:39,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:39,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:39,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:39,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:39,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:39,467 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:39,467 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:39,468 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 [2018-09-30 23:33:39,481 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:33:39,795 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 23:33:39,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:39,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:40,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:40,366 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-09-30 23:33:40,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:33:40,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:33:40,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:33:40,367 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-30 23:33:41,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:41,100 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 23:33:41,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:33:41,100 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-30 23:33:41,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:41,101 INFO L225 Difference]: With dead ends: 63 [2018-09-30 23:33:41,101 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 23:33:41,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:33:41,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 23:33:41,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 23:33:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 23:33:41,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 23:33:41,106 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-30 23:33:41,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:41,107 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 23:33:41,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:33:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 23:33:41,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 23:33:41,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:41,107 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-30 23:33:41,108 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:41,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:41,108 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-30 23:33:41,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:41,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:41,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:41,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:41,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:41,115 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:41,116 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:41,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:33:41,126 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:33:41,184 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:33:41,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:41,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:41,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:41,709 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-09-30 23:33:41,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:33:41,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:33:41,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:33:41,710 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-30 23:33:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:42,410 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 23:33:42,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:33:42,410 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-30 23:33:42,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:42,411 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:33:42,412 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 23:33:42,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:33:42,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 23:33:42,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 23:33:42,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 23:33:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 23:33:42,418 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-30 23:33:42,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:42,418 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 23:33:42,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:33:42,419 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 23:33:42,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 23:33:42,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:42,419 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-30 23:33:42,420 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:42,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:42,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-30 23:33:42,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:42,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:42,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:42,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:42,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:42,428 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:42,428 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:42,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:33:42,442 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:33:42,516 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 23:33:42,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:42,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:43,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:43,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-09-30 23:33:43,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:33:43,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:33:43,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:33:43,136 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-09-30 23:33:43,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:43,901 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 23:33:43,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:33:43,901 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-30 23:33:43,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:43,902 INFO L225 Difference]: With dead ends: 67 [2018-09-30 23:33:43,902 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 23:33:43,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:33:43,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 23:33:43,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 23:33:43,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 23:33:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 23:33:43,909 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-30 23:33:43,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:43,909 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 23:33:43,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:33:43,910 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 23:33:43,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 23:33:43,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:43,910 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-09-30 23:33:43,910 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:43,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:43,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-09-30 23:33:43,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:43,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:43,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:43,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:43,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:43,918 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:43,918 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:43,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:33:43,928 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:33:44,257 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 23:33:44,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:44,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:44,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:44,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-09-30 23:33:44,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 23:33:44,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 23:33:44,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:33:44,881 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-09-30 23:33:45,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:45,681 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 23:33:45,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:33:45,682 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-30 23:33:45,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:45,683 INFO L225 Difference]: With dead ends: 69 [2018-09-30 23:33:45,683 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 23:33:45,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:33:45,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 23:33:45,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 23:33:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 23:33:45,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 23:33:45,690 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-30 23:33:45,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:45,690 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 23:33:45,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 23:33:45,690 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 23:33:45,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 23:33:45,691 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:45,691 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-30 23:33:45,691 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:45,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:45,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-09-30 23:33:45,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:45,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:45,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:45,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:45,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:45,699 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:45,699 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:45,699 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 [2018-09-30 23:33:45,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:45,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:46,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:46,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-09-30 23:33:46,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:33:46,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:33:46,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:33:46,693 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-09-30 23:33:47,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:47,620 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 23:33:47,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:33:47,620 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-30 23:33:47,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:47,621 INFO L225 Difference]: With dead ends: 71 [2018-09-30 23:33:47,621 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 23:33:47,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:33:47,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 23:33:47,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 23:33:47,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 23:33:47,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 23:33:47,627 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-30 23:33:47,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:47,627 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 23:33:47,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:33:47,627 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 23:33:47,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 23:33:47,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:47,628 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-09-30 23:33:47,628 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:47,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:47,629 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-09-30 23:33:47,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:47,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:47,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:47,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:47,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:47,636 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:47,636 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:47,636 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 [2018-09-30 23:33:47,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:33:47,729 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:33:47,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:47,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:49,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:49,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-09-30 23:33:49,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:33:49,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:33:49,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:33:49,264 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-09-30 23:33:50,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:50,120 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 23:33:50,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:33:50,120 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-30 23:33:50,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:50,121 INFO L225 Difference]: With dead ends: 73 [2018-09-30 23:33:50,121 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 23:33:50,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:33:50,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 23:33:50,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 23:33:50,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 23:33:50,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 23:33:50,127 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-30 23:33:50,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:50,128 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 23:33:50,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 23:33:50,128 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 23:33:50,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 23:33:50,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:50,129 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-30 23:33:50,129 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:50,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:50,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-09-30 23:33:50,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:50,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:50,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:50,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:50,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:50,137 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:50,137 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:50,138 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) [2018-09-30 23:33:50,152 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:33:50,843 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 23:33:50,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:50,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:51,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:51,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-09-30 23:33:51,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:33:51,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:33:51,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:33:51,929 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-09-30 23:33:52,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:52,774 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 23:33:52,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:33:52,775 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-30 23:33:52,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:52,776 INFO L225 Difference]: With dead ends: 75 [2018-09-30 23:33:52,776 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 23:33:52,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:33:52,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 23:33:52,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 23:33:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 23:33:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 23:33:52,782 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-30 23:33:52,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:52,782 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 23:33:52,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:33:52,783 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 23:33:52,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 23:33:52,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:52,783 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-09-30 23:33:52,783 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:52,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:52,784 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-09-30 23:33:52,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:52,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:52,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:52,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:52,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:52,791 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:52,791 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:52,791 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 [2018-09-30 23:33:52,800 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:33:52,860 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:33:52,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:52,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:53,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:53,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-09-30 23:33:53,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 23:33:53,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 23:33:53,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:33:53,560 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-09-30 23:33:54,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:54,462 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 23:33:54,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:33:54,462 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-30 23:33:54,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:54,463 INFO L225 Difference]: With dead ends: 77 [2018-09-30 23:33:54,464 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 23:33:54,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:33:54,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 23:33:54,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 23:33:54,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 23:33:54,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 23:33:54,471 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-30 23:33:54,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:54,471 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 23:33:54,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 23:33:54,471 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 23:33:54,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 23:33:54,472 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:54,472 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-30 23:33:54,472 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:54,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:54,472 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-09-30 23:33:54,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:54,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:54,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:54,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:54,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:54,479 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:54,479 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:54,480 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 [2018-09-30 23:33:54,489 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:33:54,573 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 23:33:54,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:54,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:55,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:55,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-09-30 23:33:55,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:33:55,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:33:55,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:33:55,838 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-09-30 23:33:56,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:56,961 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 23:33:56,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:33:56,961 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-30 23:33:56,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:56,962 INFO L225 Difference]: With dead ends: 79 [2018-09-30 23:33:56,962 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 23:33:56,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:33:56,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 23:33:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 23:33:56,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 23:33:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 23:33:56,969 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-30 23:33:56,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:56,969 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 23:33:56,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:33:56,969 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 23:33:56,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 23:33:56,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:56,970 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-09-30 23:33:56,970 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:56,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:56,970 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-09-30 23:33:56,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:56,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:56,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:56,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:56,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:56,978 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:56,978 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:56,978 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 [2018-09-30 23:33:56,993 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:33:57,254 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 23:33:57,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:57,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:58,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:33:58,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-09-30 23:33:58,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 23:33:58,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 23:33:58,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:33:58,139 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-09-30 23:33:59,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:59,177 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 23:33:59,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:33:59,177 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-30 23:33:59,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:59,179 INFO L225 Difference]: With dead ends: 81 [2018-09-30 23:33:59,179 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 23:33:59,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:33:59,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 23:33:59,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 23:33:59,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 23:33:59,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 23:33:59,185 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-30 23:33:59,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:59,185 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 23:33:59,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 23:33:59,185 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 23:33:59,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 23:33:59,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:59,186 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-30 23:33:59,186 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:59,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:59,186 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-09-30 23:33:59,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:59,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:59,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:59,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:59,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:59,194 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:33:59,194 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:33:59,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:33:59,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:33:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:59,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:00,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:34:00,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-09-30 23:34:00,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:34:00,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:34:00,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:34:00,072 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-09-30 23:34:01,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:01,126 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 23:34:01,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:34:01,127 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-30 23:34:01,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:01,128 INFO L225 Difference]: With dead ends: 83 [2018-09-30 23:34:01,128 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 23:34:01,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:34:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 23:34:01,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 23:34:01,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 23:34:01,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 23:34:01,134 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-30 23:34:01,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:01,134 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 23:34:01,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:34:01,134 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 23:34:01,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 23:34:01,135 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:01,135 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-09-30 23:34:01,135 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:01,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:01,136 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-09-30 23:34:01,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:01,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:01,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:01,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:34:01,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:01,143 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:34:01,144 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:34:01,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:34:01,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:34:01,237 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:34:01,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:01,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:02,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:34:02,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-09-30 23:34:02,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:34:02,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:34:02,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:34:02,612 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-09-30 23:34:03,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:03,719 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 23:34:03,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:34:03,720 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-30 23:34:03,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:03,721 INFO L225 Difference]: With dead ends: 85 [2018-09-30 23:34:03,721 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 23:34:03,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:34:03,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 23:34:03,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 23:34:03,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 23:34:03,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 23:34:03,727 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-30 23:34:03,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:03,728 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 23:34:03,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:34:03,728 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 23:34:03,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 23:34:03,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:03,729 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-30 23:34:03,729 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:03,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:03,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-09-30 23:34:03,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:03,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:03,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:03,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:03,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:03,737 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:34:03,737 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:34:03,737 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 [2018-09-30 23:34:03,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:34:05,146 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 23:34:05,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:05,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:06,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:34:06,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-09-30 23:34:06,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:34:06,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:34:06,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:34:06,094 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-09-30 23:34:07,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:07,412 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 23:34:07,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:34:07,412 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-30 23:34:07,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:07,413 INFO L225 Difference]: With dead ends: 87 [2018-09-30 23:34:07,414 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 23:34:07,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:34:07,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 23:34:07,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 23:34:07,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 23:34:07,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 23:34:07,420 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-30 23:34:07,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:07,420 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 23:34:07,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:34:07,420 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 23:34:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 23:34:07,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:07,420 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-09-30 23:34:07,421 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:07,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:07,421 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-09-30 23:34:07,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:07,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:07,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:07,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:07,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:07,428 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:34:07,428 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:34:07,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:34:07,443 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:34:07,541 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:34:07,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:07,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:08,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:34:08,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-09-30 23:34:08,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 23:34:08,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 23:34:08,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:34:08,598 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-09-30 23:34:09,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:09,817 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 23:34:09,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:34:09,817 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-30 23:34:09,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:09,819 INFO L225 Difference]: With dead ends: 89 [2018-09-30 23:34:09,819 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 23:34:09,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:34:09,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 23:34:09,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 23:34:09,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 23:34:09,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 23:34:09,826 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-30 23:34:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:09,827 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 23:34:09,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 23:34:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 23:34:09,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 23:34:09,827 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:09,827 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-30 23:34:09,828 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:09,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:09,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-09-30 23:34:09,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:09,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:09,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:09,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:09,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:09,835 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:34:09,836 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:34:09,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:34:09,848 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:34:09,965 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 23:34:09,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:09,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:11,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:34:11,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-09-30 23:34:11,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:34:11,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:34:11,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:34:11,752 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-09-30 23:34:13,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:13,151 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 23:34:13,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:34:13,152 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-30 23:34:13,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:13,153 INFO L225 Difference]: With dead ends: 91 [2018-09-30 23:34:13,165 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 23:34:13,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:34:13,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 23:34:13,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 23:34:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 23:34:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 23:34:13,170 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-30 23:34:13,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:13,170 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 23:34:13,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:34:13,170 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 23:34:13,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 23:34:13,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:13,171 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-09-30 23:34:13,171 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:13,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:13,171 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-09-30 23:34:13,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:13,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:13,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:13,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:13,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:13,178 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:34:13,178 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:34:13,179 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 [2018-09-30 23:34:13,194 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:34:13,605 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 23:34:13,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:13,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:14,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:34:14,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-09-30 23:34:14,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 23:34:14,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 23:34:14,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:34:14,626 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-09-30 23:34:16,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:16,047 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 23:34:16,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:34:16,048 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-30 23:34:16,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:16,049 INFO L225 Difference]: With dead ends: 93 [2018-09-30 23:34:16,049 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 23:34:16,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:34:16,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 23:34:16,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 23:34:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 23:34:16,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 23:34:16,056 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-30 23:34:16,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:16,056 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 23:34:16,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 23:34:16,056 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 23:34:16,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 23:34:16,056 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:16,056 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-30 23:34:16,057 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:16,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:16,057 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-09-30 23:34:16,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:16,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:16,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:16,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:16,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:16,063 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:34:16,063 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:34:16,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:34:16,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:34:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:16,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:17,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:34:17,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-09-30 23:34:17,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:34:17,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:34:17,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:34:17,503 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-09-30 23:34:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:18,910 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 23:34:18,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:34:18,910 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-30 23:34:18,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:18,912 INFO L225 Difference]: With dead ends: 95 [2018-09-30 23:34:18,912 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 23:34:18,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:34:18,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 23:34:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 23:34:18,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 23:34:18,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 23:34:18,918 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-30 23:34:18,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:18,918 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 23:34:18,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:34:18,918 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 23:34:18,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 23:34:18,918 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:18,918 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-09-30 23:34:18,919 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:18,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:18,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-09-30 23:34:18,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:18,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:18,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:18,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:34:18,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:18,925 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:34:18,925 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:34:18,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:34:18,933 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:34:19,043 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:34:19,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:19,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:20,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:34:20,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-09-30 23:34:20,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:34:20,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:34:20,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:34:20,132 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-09-30 23:34:21,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:21,594 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 23:34:21,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:34:21,594 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-30 23:34:21,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:21,595 INFO L225 Difference]: With dead ends: 97 [2018-09-30 23:34:21,595 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 23:34:21,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:34:21,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 23:34:21,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 23:34:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 23:34:21,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 23:34:21,603 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-30 23:34:21,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:21,603 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 23:34:21,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:34:21,603 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 23:34:21,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 23:34:21,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:21,604 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-30 23:34:21,604 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:21,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:21,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-09-30 23:34:21,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:21,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:21,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:21,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:21,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:21,611 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:34:21,611 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:34:21,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:34:21,623 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:34:24,225 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 23:34:24,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:24,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:25,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:34:25,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-09-30 23:34:25,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:34:25,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:34:25,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:34:25,377 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-09-30 23:34:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:26,957 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 23:34:26,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:34:26,957 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-30 23:34:26,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:26,958 INFO L225 Difference]: With dead ends: 99 [2018-09-30 23:34:26,958 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 23:34:26,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:34:26,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 23:34:26,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 23:34:26,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 23:34:26,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 23:34:26,964 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-30 23:34:26,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:26,964 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 23:34:26,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:34:26,964 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 23:34:26,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 23:34:26,965 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:26,965 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-09-30 23:34:26,965 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:26,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:26,965 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-09-30 23:34:26,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:26,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:26,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:26,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:26,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:26,972 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:34:26,972 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:34:26,972 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 [2018-09-30 23:34:26,983 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:34:27,102 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:34:27,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:27,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:29,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:29,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:34:29,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-09-30 23:34:29,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 23:34:29,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 23:34:29,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:34:29,023 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-09-30 23:34:30,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:30,665 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 23:34:30,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:34:30,666 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-30 23:34:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:30,667 INFO L225 Difference]: With dead ends: 101 [2018-09-30 23:34:30,667 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 23:34:30,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:34:30,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 23:34:30,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 23:34:30,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 23:34:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 23:34:30,674 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-30 23:34:30,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:30,675 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 23:34:30,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 23:34:30,675 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 23:34:30,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 23:34:30,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:30,675 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-30 23:34:30,676 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:30,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:30,676 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-09-30 23:34:30,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:30,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:30,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:30,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:30,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:30,685 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:34:30,685 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:34:30,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:34:30,694 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:34:30,849 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 23:34:30,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:30,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:32,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:34:32,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-09-30 23:34:32,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:34:32,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:34:32,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:34:32,529 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-09-30 23:34:34,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:34,206 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 23:34:34,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:34:34,206 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-30 23:34:34,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:34,207 INFO L225 Difference]: With dead ends: 103 [2018-09-30 23:34:34,207 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 23:34:34,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:34:34,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 23:34:34,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 23:34:34,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 23:34:34,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 23:34:34,215 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-30 23:34:34,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:34,215 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 23:34:34,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:34:34,215 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 23:34:34,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 23:34:34,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:34,216 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-09-30 23:34:34,216 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:34,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:34,217 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-09-30 23:34:34,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:34,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:34,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:34,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:34,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:34,225 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:34:34,225 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:34:34,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:34:34,241 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:34:36,301 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 23:34:36,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:36,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:37,736 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:34:37,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-09-30 23:34:37,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 23:34:37,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 23:34:37,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:34:37,737 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-09-30 23:34:39,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:39,535 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 23:34:39,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:34:39,535 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-30 23:34:39,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:39,536 INFO L225 Difference]: With dead ends: 105 [2018-09-30 23:34:39,536 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 23:34:39,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:34:39,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 23:34:39,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 23:34:39,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 23:34:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 23:34:39,543 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-30 23:34:39,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:39,543 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 23:34:39,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 23:34:39,544 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 23:34:39,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 23:34:39,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:39,544 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-30 23:34:39,544 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:39,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:39,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-09-30 23:34:39,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:39,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:39,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:39,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:39,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:39,552 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:34:39,552 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:34:39,552 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 [2018-09-30 23:34:39,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:34:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:34:39,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:41,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:34:41,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-09-30 23:34:41,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:34:41,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:34:41,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:34:41,012 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-09-30 23:34:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:42,968 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 23:34:42,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:34:42,969 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-30 23:34:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:42,970 INFO L225 Difference]: With dead ends: 107 [2018-09-30 23:34:42,970 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 23:34:42,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:34:42,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 23:34:42,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 23:34:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 23:34:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 23:34:42,978 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-30 23:34:42,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:42,979 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 23:34:42,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:34:42,979 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 23:34:42,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 23:34:42,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:42,980 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-09-30 23:34:42,980 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:42,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:42,980 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-09-30 23:34:42,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:42,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:42,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:42,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:34:42,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:42,988 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:34:42,989 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:34:42,989 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 [2018-09-30 23:34:43,004 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:34:43,150 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:34:43,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:43,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:44,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:34:44,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-09-30 23:34:44,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:34:44,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:34:44,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:34:44,841 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-09-30 23:34:46,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:46,773 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 23:34:46,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:34:46,773 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-30 23:34:46,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:46,774 INFO L225 Difference]: With dead ends: 109 [2018-09-30 23:34:46,774 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 23:34:46,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:34:46,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 23:34:46,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 23:34:46,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 23:34:46,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 23:34:46,781 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-09-30 23:34:46,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:46,782 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 23:34:46,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:34:46,782 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 23:34:46,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 23:34:46,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:46,783 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-30 23:34:46,783 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:46,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:46,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-09-30 23:34:46,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:46,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:46,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:46,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:46,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:46,792 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:34:46,792 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:34:46,792 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 [2018-09-30 23:34:46,807 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:34:51,338 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 23:34:51,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:51,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:53,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:34:53,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-09-30 23:34:53,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:34:53,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:34:53,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:34:53,003 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-09-30 23:34:55,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:55,024 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 23:34:55,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:34:55,025 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-30 23:34:55,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:55,026 INFO L225 Difference]: With dead ends: 111 [2018-09-30 23:34:55,026 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 23:34:55,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:34:55,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 23:34:55,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 23:34:55,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 23:34:55,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 23:34:55,034 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-09-30 23:34:55,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:55,034 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 23:34:55,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:34:55,034 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 23:34:55,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 23:34:55,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:55,035 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-09-30 23:34:55,035 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:55,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:55,035 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-09-30 23:34:55,035 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:55,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:55,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:55,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:55,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:55,042 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:34:55,043 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:34:55,043 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 [2018-09-30 23:34:55,054 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:34:55,174 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:34:55,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:55,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:34:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:34:56,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:34:56,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-09-30 23:34:56,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 23:34:56,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 23:34:56,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:34:56,738 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-09-30 23:34:58,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:34:58,919 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 23:34:58,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:34:58,920 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-30 23:34:58,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:34:58,921 INFO L225 Difference]: With dead ends: 113 [2018-09-30 23:34:58,921 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 23:34:58,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:34:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 23:34:58,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 23:34:58,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 23:34:58,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 23:34:58,929 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-09-30 23:34:58,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:34:58,929 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 23:34:58,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 23:34:58,930 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 23:34:58,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 23:34:58,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:34:58,930 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-30 23:34:58,931 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:34:58,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:34:58,931 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-09-30 23:34:58,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:34:58,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:34:58,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:58,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:34:58,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:34:58,939 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:34:58,939 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:34:58,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:34:58,954 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:34:59,136 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 23:34:59,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:34:59,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:00,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:35:00,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-09-30 23:35:00,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:35:00,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:35:00,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:35:00,745 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-09-30 23:35:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:03,073 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 23:35:03,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:35:03,074 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-30 23:35:03,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:03,075 INFO L225 Difference]: With dead ends: 115 [2018-09-30 23:35:03,075 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 23:35:03,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:35:03,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 23:35:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 23:35:03,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 23:35:03,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-30 23:35:03,082 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-09-30 23:35:03,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:03,082 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-30 23:35:03,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:35:03,083 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-30 23:35:03,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 23:35:03,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:03,083 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-09-30 23:35:03,084 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:03,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:03,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-09-30 23:35:03,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:03,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:03,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:03,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:03,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:03,093 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:35:03,093 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:35:03,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:35:03,107 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:35:05,744 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 23:35:05,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:05,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:07,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:35:07,325 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-09-30 23:35:07,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 23:35:07,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 23:35:07,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:35:07,326 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-09-30 23:35:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:09,710 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 23:35:09,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:35:09,711 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-30 23:35:09,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:09,712 INFO L225 Difference]: With dead ends: 117 [2018-09-30 23:35:09,713 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 23:35:09,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:35:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 23:35:09,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 23:35:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 23:35:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 23:35:09,720 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-09-30 23:35:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:09,721 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 23:35:09,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 23:35:09,721 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 23:35:09,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 23:35:09,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:09,722 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-30 23:35:09,722 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:09,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:09,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-09-30 23:35:09,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:09,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:09,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:09,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:09,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:09,731 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:35:09,731 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:35:09,731 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:35:09,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:35:09,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:09,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:11,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:35:11,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-09-30 23:35:11,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:35:11,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:35:11,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:35:11,598 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-09-30 23:35:14,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:14,039 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 23:35:14,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:35:14,040 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-30 23:35:14,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:14,041 INFO L225 Difference]: With dead ends: 119 [2018-09-30 23:35:14,041 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 23:35:14,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:35:14,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 23:35:14,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 23:35:14,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 23:35:14,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-30 23:35:14,049 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-09-30 23:35:14,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:14,049 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-30 23:35:14,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:35:14,049 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-30 23:35:14,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 23:35:14,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:14,050 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-09-30 23:35:14,050 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:14,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:14,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-09-30 23:35:14,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:14,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:14,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:14,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:35:14,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:14,058 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:35:14,059 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:35:14,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:35:14,073 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:35:14,223 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:35:14,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:14,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:17,306 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:35:17,306 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-09-30 23:35:17,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:35:17,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:35:17,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:35:17,307 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-09-30 23:35:19,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:19,819 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 23:35:19,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:35:19,820 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-30 23:35:19,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:19,821 INFO L225 Difference]: With dead ends: 121 [2018-09-30 23:35:19,821 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 23:35:19,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:35:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 23:35:19,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 23:35:19,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 23:35:19,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 23:35:19,828 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-09-30 23:35:19,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:19,828 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 23:35:19,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:35:19,828 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 23:35:19,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 23:35:19,829 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:19,829 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-30 23:35:19,829 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:19,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:19,829 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-09-30 23:35:19,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:19,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:19,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:19,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:19,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:19,837 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:35:19,837 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:35:19,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:35:19,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:35:27,553 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-30 23:35:27,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:27,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:29,859 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:35:29,859 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-09-30 23:35:29,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:35:29,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:35:29,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:35:29,860 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-09-30 23:35:32,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:32,321 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 23:35:32,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:35:32,322 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-30 23:35:32,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:32,323 INFO L225 Difference]: With dead ends: 123 [2018-09-30 23:35:32,323 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 23:35:32,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:35:32,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 23:35:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 23:35:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 23:35:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-30 23:35:32,329 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-09-30 23:35:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:32,329 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-30 23:35:32,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:35:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-30 23:35:32,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 23:35:32,330 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:32,330 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-09-30 23:35:32,330 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:32,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:32,330 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-09-30 23:35:32,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:32,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:32,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:32,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:32,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:32,338 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:35:32,338 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:35:32,338 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 [2018-09-30 23:35:32,353 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:35:32,502 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:35:32,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:32,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:34,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:35:34,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-09-30 23:35:34,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 23:35:34,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 23:35:34,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:35:34,650 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-09-30 23:35:37,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:37,141 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 23:35:37,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:35:37,141 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-09-30 23:35:37,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:37,143 INFO L225 Difference]: With dead ends: 125 [2018-09-30 23:35:37,143 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 23:35:37,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:35:37,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 23:35:37,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 23:35:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 23:35:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 23:35:37,151 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-09-30 23:35:37,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:37,151 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 23:35:37,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 23:35:37,151 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 23:35:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 23:35:37,152 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:37,152 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-30 23:35:37,153 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:37,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:37,153 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-09-30 23:35:37,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:37,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:37,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:37,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:37,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:37,160 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:35:37,161 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:35:37,161 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) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:35:37,175 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:35:37,409 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-30 23:35:37,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:37,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:39,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:35:39,527 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-09-30 23:35:39,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:35:39,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:35:39,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:35:39,528 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-09-30 23:35:42,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:42,822 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 23:35:42,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:35:42,823 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-30 23:35:42,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:42,824 INFO L225 Difference]: With dead ends: 127 [2018-09-30 23:35:42,824 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 23:35:42,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:35:42,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 23:35:42,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 23:35:42,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 23:35:42,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-30 23:35:42,832 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-09-30 23:35:42,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:42,832 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-30 23:35:42,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:35:42,832 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-30 23:35:42,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 23:35:42,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:42,833 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-09-30 23:35:42,833 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:42,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:42,834 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-09-30 23:35:42,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:42,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:42,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:42,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:42,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:42,841 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:35:42,841 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:35:42,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:35:42,856 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:35:44,387 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 23:35:44,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:44,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:46,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:35:46,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-09-30 23:35:46,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 23:35:46,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 23:35:46,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:35:46,224 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-09-30 23:35:48,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:48,968 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 23:35:48,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:35:48,969 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-09-30 23:35:48,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:48,970 INFO L225 Difference]: With dead ends: 129 [2018-09-30 23:35:48,970 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 23:35:48,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:35:48,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 23:35:48,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 23:35:48,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 23:35:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-30 23:35:48,978 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-09-30 23:35:48,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:48,978 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-30 23:35:48,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 23:35:48,978 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-30 23:35:48,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 23:35:48,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:48,979 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-30 23:35:48,979 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:48,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:48,980 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-09-30 23:35:48,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:48,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:48,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:48,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:35:48,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:48,987 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:35:48,987 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:35:48,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:35:48,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:35:49,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:35:49,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:51,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:35:51,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-09-30 23:35:51,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:35:51,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:35:51,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:35:51,072 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-09-30 23:35:54,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:35:54,601 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 23:35:54,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 23:35:54,602 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-30 23:35:54,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:35:54,603 INFO L225 Difference]: With dead ends: 131 [2018-09-30 23:35:54,603 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 23:35:54,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:35:54,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 23:35:54,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-30 23:35:54,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 23:35:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-30 23:35:54,609 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-09-30 23:35:54,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:35:54,610 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-30 23:35:54,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:35:54,610 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-30 23:35:54,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 23:35:54,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:35:54,610 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-09-30 23:35:54,611 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:35:54,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:35:54,611 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-09-30 23:35:54,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:35:54,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:35:54,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:54,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:35:54,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:35:54,618 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:35:54,618 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:35:54,618 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 [2018-09-30 23:35:54,626 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:35:54,786 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:35:54,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:35:54,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:35:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:35:56,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:35:56,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-09-30 23:35:56,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:35:56,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:35:56,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:35:56,730 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-09-30 23:36:00,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:00,576 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 23:36:00,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:36:00,576 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-09-30 23:36:00,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:00,577 INFO L225 Difference]: With dead ends: 133 [2018-09-30 23:36:00,578 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 23:36:00,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:36:00,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 23:36:00,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 23:36:00,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 23:36:00,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-30 23:36:00,584 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-09-30 23:36:00,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:00,584 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-30 23:36:00,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:36:00,585 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-30 23:36:00,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 23:36:00,585 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:00,585 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-30 23:36:00,585 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:00,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:00,586 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-09-30 23:36:00,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:00,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:00,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:00,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:00,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:00,594 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:36:00,594 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:36:00,594 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 [2018-09-30 23:36:00,612 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:36:13,231 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-30 23:36:13,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:13,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:15,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:36:15,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-09-30 23:36:15,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:36:15,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:36:15,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:36:15,647 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-09-30 23:36:18,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:18,590 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 23:36:18,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:36:18,591 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-30 23:36:18,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:18,592 INFO L225 Difference]: With dead ends: 135 [2018-09-30 23:36:18,592 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 23:36:18,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:36:18,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 23:36:18,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 23:36:18,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 23:36:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-30 23:36:18,600 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-09-30 23:36:18,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:18,600 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-30 23:36:18,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:36:18,600 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-30 23:36:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 23:36:18,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:18,601 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-09-30 23:36:18,601 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:18,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:18,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-09-30 23:36:18,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:18,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:18,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:18,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:18,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:18,610 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:36:18,610 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:36:18,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:36:18,624 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:36:18,825 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:36:18,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:18,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:21,149 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:36:21,149 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-09-30 23:36:21,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 23:36:21,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 23:36:21,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:36:21,150 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-09-30 23:36:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:24,661 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 23:36:24,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:36:24,661 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-09-30 23:36:24,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:24,662 INFO L225 Difference]: With dead ends: 137 [2018-09-30 23:36:24,662 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 23:36:24,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:36:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 23:36:24,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 23:36:24,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 23:36:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-30 23:36:24,668 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-09-30 23:36:24,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:24,668 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-30 23:36:24,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 23:36:24,669 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-30 23:36:24,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 23:36:24,669 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:24,669 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-30 23:36:24,669 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:24,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:24,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-09-30 23:36:24,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:24,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:24,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:24,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:24,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:24,678 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:36:24,678 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:36:24,679 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 [2018-09-30 23:36:24,689 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:36:25,000 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-30 23:36:25,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:25,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:27,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:36:27,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-09-30 23:36:27,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:36:27,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:36:27,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:36:27,160 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-09-30 23:36:30,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:30,404 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 23:36:30,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 23:36:30,404 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-30 23:36:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:30,405 INFO L225 Difference]: With dead ends: 139 [2018-09-30 23:36:30,405 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 23:36:30,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:36:30,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 23:36:30,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 23:36:30,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 23:36:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-30 23:36:30,412 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-09-30 23:36:30,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:30,412 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-30 23:36:30,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:36:30,413 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-30 23:36:30,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 23:36:30,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:30,413 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-09-30 23:36:30,413 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:30,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:30,414 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-09-30 23:36:30,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:30,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:30,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:30,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:30,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:30,420 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:36:30,420 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:36:30,420 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 [2018-09-30 23:36:30,432 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:36:31,777 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 23:36:31,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:31,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:33,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:36:33,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-09-30 23:36:33,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 23:36:33,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 23:36:33,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:36:33,992 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-09-30 23:36:37,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:37,386 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 23:36:37,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:36:37,387 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-09-30 23:36:37,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:37,388 INFO L225 Difference]: With dead ends: 141 [2018-09-30 23:36:37,388 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 23:36:37,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:36:37,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 23:36:37,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 23:36:37,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 23:36:37,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-30 23:36:37,395 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-09-30 23:36:37,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:37,395 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-30 23:36:37,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 23:36:37,395 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-30 23:36:37,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 23:36:37,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:37,396 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-30 23:36:37,396 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:37,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:37,396 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-09-30 23:36:37,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:37,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:37,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:37,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:37,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:37,404 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:36:37,404 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:36:37,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:36:37,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:36:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:36:37,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:39,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:36:39,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-09-30 23:36:39,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 23:36:39,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 23:36:39,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:36:39,940 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-09-30 23:36:43,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:43,451 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 23:36:43,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:36:43,452 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-30 23:36:43,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:43,453 INFO L225 Difference]: With dead ends: 143 [2018-09-30 23:36:43,453 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 23:36:43,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:36:43,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 23:36:43,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 23:36:43,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 23:36:43,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-30 23:36:43,461 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-09-30 23:36:43,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:43,461 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-30 23:36:43,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 23:36:43,461 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-30 23:36:43,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 23:36:43,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:43,462 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-09-30 23:36:43,462 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:43,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:43,462 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-09-30 23:36:43,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:43,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:43,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:43,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:36:43,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:43,470 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:36:43,470 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:36:43,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:36:43,479 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:36:43,699 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:36:43,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:36:43,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:36:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:36:46,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:36:46,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-09-30 23:36:46,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:36:46,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:36:46,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:36:46,289 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-09-30 23:36:50,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:36:50,502 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 23:36:50,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:36:50,503 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-09-30 23:36:50,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:36:50,503 INFO L225 Difference]: With dead ends: 145 [2018-09-30 23:36:50,503 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 23:36:50,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:36:50,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 23:36:50,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 23:36:50,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 23:36:50,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-30 23:36:50,509 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-09-30 23:36:50,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:36:50,509 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-30 23:36:50,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:36:50,509 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-30 23:36:50,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 23:36:50,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:36:50,510 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-30 23:36:50,510 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:36:50,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:36:50,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-09-30 23:36:50,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:36:50,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:36:50,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:50,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:36:50,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:36:50,519 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:36:50,519 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:36:50,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:36:50,533 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:37:10,559 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 23:37:10,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:10,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:13,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:13,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:37:13,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-09-30 23:37:13,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 23:37:13,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 23:37:13,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:37:13,240 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-09-30 23:37:17,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:17,694 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 23:37:17,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 23:37:17,695 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-30 23:37:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:17,696 INFO L225 Difference]: With dead ends: 147 [2018-09-30 23:37:17,696 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 23:37:17,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:37:17,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 23:37:17,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 23:37:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 23:37:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-30 23:37:17,703 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-09-30 23:37:17,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:17,703 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-30 23:37:17,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 23:37:17,703 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-30 23:37:17,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 23:37:17,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:17,704 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-09-30 23:37:17,704 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:17,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:17,704 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-09-30 23:37:17,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:17,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:17,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:17,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:17,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:17,713 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:37:17,713 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:37:17,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:37:17,723 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:37:17,965 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:37:17,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:17,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:20,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:37:20,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-09-30 23:37:20,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 23:37:20,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 23:37:20,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:37:20,457 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-09-30 23:37:24,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:24,973 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 23:37:24,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 23:37:24,973 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-09-30 23:37:24,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:24,975 INFO L225 Difference]: With dead ends: 149 [2018-09-30 23:37:24,975 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 23:37:24,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:37:24,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 23:37:24,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 23:37:24,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 23:37:24,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-30 23:37:24,981 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-09-30 23:37:24,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:24,981 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-30 23:37:24,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 23:37:24,981 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-30 23:37:24,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 23:37:24,982 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:24,982 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-30 23:37:24,982 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:24,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:24,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-09-30 23:37:24,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:24,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:24,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:24,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:24,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:24,991 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:37:24,991 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:37:24,991 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 [2018-09-30 23:37:24,998 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:37:25,396 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-30 23:37:25,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:25,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:28,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:37:28,168 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-09-30 23:37:28,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:37:28,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:37:28,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:37:28,169 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-09-30 23:37:32,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:32,356 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 23:37:32,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:37:32,357 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-30 23:37:32,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:32,359 INFO L225 Difference]: With dead ends: 151 [2018-09-30 23:37:32,359 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 23:37:32,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:37:32,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 23:37:32,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 23:37:32,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 23:37:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-30 23:37:32,367 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-09-30 23:37:32,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:32,368 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-30 23:37:32,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:37:32,368 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-30 23:37:32,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 23:37:32,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:32,369 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-09-30 23:37:32,369 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:32,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:32,369 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-09-30 23:37:32,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:32,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:32,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:32,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:32,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:32,377 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:37:32,378 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:37:32,378 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 [2018-09-30 23:37:32,392 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:37:35,454 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 23:37:35,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:35,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:38,459 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:37:38,459 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2018-09-30 23:37:38,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 23:37:38,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 23:37:38,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:37:38,460 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-09-30 23:37:43,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:43,214 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 23:37:43,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 23:37:43,215 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-09-30 23:37:43,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:43,217 INFO L225 Difference]: With dead ends: 153 [2018-09-30 23:37:43,217 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 23:37:43,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:37:43,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 23:37:43,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 23:37:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 23:37:43,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-30 23:37:43,225 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-09-30 23:37:43,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:43,226 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-30 23:37:43,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 23:37:43,226 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-30 23:37:43,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 23:37:43,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:43,227 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-30 23:37:43,227 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:43,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:43,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-09-30 23:37:43,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:43,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:43,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:43,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:43,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:43,236 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:37:43,236 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:37:43,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:37:43,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:37:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:37:43,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:46,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:37:46,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2018-09-30 23:37:46,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 23:37:46,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 23:37:46,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:37:46,176 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-09-30 23:37:50,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:50,290 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 23:37:50,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 23:37:50,290 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-30 23:37:50,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:50,291 INFO L225 Difference]: With dead ends: 155 [2018-09-30 23:37:50,291 INFO L226 Difference]: Without dead ends: 153 [2018-09-30 23:37:50,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:37:50,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-30 23:37:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-30 23:37:50,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 23:37:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-30 23:37:50,298 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-09-30 23:37:50,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:50,298 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-30 23:37:50,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 23:37:50,298 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-30 23:37:50,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 23:37:50,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:50,299 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-09-30 23:37:50,299 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:50,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:50,300 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-09-30 23:37:50,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:50,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:50,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:50,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:37:50,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:50,307 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:37:50,308 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:37:50,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:37:50,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:37:50,588 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:37:50,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:37:50,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:37:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:37:53,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:37:53,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2018-09-30 23:37:53,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:37:53,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:37:53,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:37:53,927 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-09-30 23:37:58,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:37:58,092 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 23:37:58,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:37:58,092 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-09-30 23:37:58,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:37:58,094 INFO L225 Difference]: With dead ends: 157 [2018-09-30 23:37:58,094 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 23:37:58,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:37:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 23:37:58,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 23:37:58,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 23:37:58,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-30 23:37:58,101 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-09-30 23:37:58,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:37:58,102 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-30 23:37:58,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:37:58,102 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-30 23:37:58,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 23:37:58,102 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:37:58,102 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-30 23:37:58,103 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:37:58,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:37:58,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-09-30 23:37:58,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:37:58,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:37:58,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:58,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:37:58,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:37:58,109 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:37:58,109 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:37:58,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:37:58,117 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:38:26,279 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-30 23:38:26,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:38:26,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:29,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:38:29,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2018-09-30 23:38:29,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 23:38:29,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 23:38:29,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:38:29,311 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-09-30 23:38:34,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:34,373 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 23:38:34,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 23:38:34,374 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-30 23:38:34,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:34,375 INFO L225 Difference]: With dead ends: 159 [2018-09-30 23:38:34,375 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 23:38:34,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:38:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 23:38:34,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 23:38:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 23:38:34,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-30 23:38:34,382 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-09-30 23:38:34,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:34,382 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-30 23:38:34,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 23:38:34,382 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-30 23:38:34,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 23:38:34,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:34,383 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-09-30 23:38:34,383 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:34,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:34,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-09-30 23:38:34,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:34,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:34,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:34,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:38:34,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:34,390 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:38:34,390 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:38:34,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:38:34,398 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:38:34,698 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:38:34,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:38:34,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:37,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:38:37,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2018-09-30 23:38:37,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 23:38:37,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 23:38:37,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:38:37,531 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-09-30 23:38:41,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:41,936 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 23:38:41,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 23:38:41,937 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-09-30 23:38:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:41,938 INFO L225 Difference]: With dead ends: 161 [2018-09-30 23:38:41,938 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 23:38:41,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:38:41,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 23:38:41,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-30 23:38:41,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-30 23:38:41,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-30 23:38:41,946 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-09-30 23:38:41,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:41,946 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-30 23:38:41,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 23:38:41,946 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-30 23:38:41,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 23:38:41,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:41,947 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-09-30 23:38:41,947 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:41,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:41,947 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-09-30 23:38:41,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:41,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:41,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:41,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:38:41,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:41,955 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:38:41,956 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:38:41,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:38:41,962 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:38:42,442 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-30 23:38:42,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:38:42,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:38:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:38:45,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:38:45,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2018-09-30 23:38:45,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:38:45,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:38:45,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:38:45,715 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-09-30 23:38:50,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:38:50,202 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 23:38:50,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 23:38:50,202 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-30 23:38:50,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:38:50,204 INFO L225 Difference]: With dead ends: 163 [2018-09-30 23:38:50,204 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 23:38:50,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:38:50,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 23:38:50,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-30 23:38:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 23:38:50,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-30 23:38:50,213 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-09-30 23:38:50,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:38:50,214 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-30 23:38:50,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:38:50,214 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-30 23:38:50,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 23:38:50,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:38:50,215 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-09-30 23:38:50,215 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:38:50,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:38:50,215 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-09-30 23:38:50,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:38:50,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:38:50,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:50,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:38:50,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:38:50,224 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:38:50,224 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:38:50,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:38:50,235 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:38:59,360 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 23:38:59,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:38:59,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:39:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:02,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:39:02,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2018-09-30 23:39:02,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 23:39:02,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 23:39:02,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:39:02,398 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-09-30 23:39:07,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:39:07,061 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 23:39:07,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:39:07,061 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-09-30 23:39:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:39:07,063 INFO L225 Difference]: With dead ends: 165 [2018-09-30 23:39:07,063 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 23:39:07,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:39:07,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 23:39:07,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 23:39:07,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 23:39:07,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-30 23:39:07,073 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-09-30 23:39:07,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:39:07,073 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-30 23:39:07,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 23:39:07,073 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-30 23:39:07,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 23:39:07,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:39:07,074 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-09-30 23:39:07,074 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:39:07,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:39:07,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-09-30 23:39:07,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:39:07,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:39:07,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:07,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:39:07,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:07,083 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:39:07,083 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:39:07,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:39:07,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:39:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:39:07,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:39:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:10,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:39:10,868 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2018-09-30 23:39:10,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 23:39:10,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 23:39:10,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:39:10,869 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-09-30 23:39:16,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:39:16,396 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-30 23:39:16,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 23:39:16,396 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-30 23:39:16,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:39:16,398 INFO L225 Difference]: With dead ends: 167 [2018-09-30 23:39:16,398 INFO L226 Difference]: Without dead ends: 165 [2018-09-30 23:39:16,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:39:16,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-30 23:39:16,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-30 23:39:16,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 23:39:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-30 23:39:16,405 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-09-30 23:39:16,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:39:16,405 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-30 23:39:16,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 23:39:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-30 23:39:16,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 23:39:16,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:39:16,406 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-09-30 23:39:16,407 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:39:16,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:39:16,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-09-30 23:39:16,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:39:16,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:39:16,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:16,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:39:16,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:16,416 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:39:16,417 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:39:16,417 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:39:16,432 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:39:16,785 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:39:16,785 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:39:16,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:39:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:39:20,285 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:39:20,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2018-09-30 23:39:20,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:39:20,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:39:20,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:39:20,286 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-09-30 23:39:25,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:39:25,112 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-30 23:39:25,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:39:25,113 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-09-30 23:39:25,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:39:25,114 INFO L225 Difference]: With dead ends: 169 [2018-09-30 23:39:25,114 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 23:39:25,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:39:25,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 23:39:25,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-30 23:39:25,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 23:39:25,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-30 23:39:25,121 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-09-30 23:39:25,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:39:25,121 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-30 23:39:25,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:39:25,122 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-30 23:39:25,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 23:39:25,122 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:39:25,122 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-09-30 23:39:25,122 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:39:25,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:39:25,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-09-30 23:39:25,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:39:25,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:39:25,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:25,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:39:25,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:39:25,131 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:39:25,131 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:39:25,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-09-30 23:39:25,146 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:40:06,258 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-30 23:40:06,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:40:06,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:40:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:10,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:40:10,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2018-09-30 23:40:10,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 23:40:10,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 23:40:10,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:40:10,367 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-09-30 23:40:15,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:40:15,277 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-30 23:40:15,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 23:40:15,277 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-30 23:40:15,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:40:15,278 INFO L225 Difference]: With dead ends: 171 [2018-09-30 23:40:15,278 INFO L226 Difference]: Without dead ends: 169 [2018-09-30 23:40:15,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:40:15,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-30 23:40:15,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-30 23:40:15,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 23:40:15,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-30 23:40:15,284 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-09-30 23:40:15,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:40:15,284 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-30 23:40:15,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 23:40:15,284 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-30 23:40:15,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 23:40:15,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:40:15,285 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-09-30 23:40:15,285 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:40:15,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:40:15,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-09-30 23:40:15,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:40:15,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:40:15,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:15,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:40:15,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:15,292 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:40:15,292 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:40:15,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:40:15,299 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:40:15,669 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:40:15,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:40:15,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:40:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:18,955 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:40:18,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2018-09-30 23:40:18,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 23:40:18,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 23:40:18,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:40:18,956 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-09-30 23:40:24,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:40:24,755 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-30 23:40:24,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 23:40:24,755 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-09-30 23:40:24,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:40:24,757 INFO L225 Difference]: With dead ends: 173 [2018-09-30 23:40:24,757 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 23:40:24,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:40:24,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 23:40:24,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 23:40:24,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 23:40:24,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-30 23:40:24,765 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-09-30 23:40:24,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:40:24,765 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-30 23:40:24,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 23:40:24,765 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-30 23:40:24,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 23:40:24,765 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:40:24,766 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-09-30 23:40:24,766 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:40:24,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:40:24,766 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-09-30 23:40:24,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:40:24,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:40:24,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:24,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:40:24,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:24,774 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:40:24,774 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:40:24,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:40:24,790 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:40:25,374 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-30 23:40:25,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:40:25,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:40:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:28,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:40:28,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2018-09-30 23:40:28,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 23:40:28,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 23:40:28,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:40:28,881 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-09-30 23:40:34,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:40:34,097 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-30 23:40:34,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 23:40:34,097 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-30 23:40:34,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:40:34,098 INFO L225 Difference]: With dead ends: 175 [2018-09-30 23:40:34,098 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 23:40:34,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:40:34,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 23:40:34,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 23:40:34,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 23:40:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-09-30 23:40:34,106 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-09-30 23:40:34,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:40:34,107 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-09-30 23:40:34,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 23:40:34,107 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-09-30 23:40:34,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 23:40:34,108 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:40:34,108 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-09-30 23:40:34,108 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:40:34,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:40:34,108 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-09-30 23:40:34,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:40:34,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:40:34,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:34,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:40:34,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:34,118 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:40:34,118 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:40:34,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:40:34,134 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:40:40,266 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-30 23:40:40,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:40:40,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:40:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:44,021 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:40:44,021 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2018-09-30 23:40:44,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 23:40:44,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 23:40:44,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:40:44,022 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-09-30 23:40:50,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:40:50,061 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-30 23:40:50,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 23:40:50,061 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-09-30 23:40:50,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:40:50,063 INFO L225 Difference]: With dead ends: 177 [2018-09-30 23:40:50,063 INFO L226 Difference]: Without dead ends: 175 [2018-09-30 23:40:50,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:40:50,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-30 23:40:50,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-30 23:40:50,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 23:40:50,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-30 23:40:50,072 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-09-30 23:40:50,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:40:50,073 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-30 23:40:50,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 23:40:50,073 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-30 23:40:50,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-30 23:40:50,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:40:50,074 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-09-30 23:40:50,074 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:40:50,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:40:50,074 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-09-30 23:40:50,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:40:50,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:40:50,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:50,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:40:50,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:40:50,083 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:40:50,083 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:40:50,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-09-30 23:40:50,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:40:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:40:50,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:40:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:40:54,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:40:54,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2018-09-30 23:40:54,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 23:40:54,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 23:40:54,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:40:54,342 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-09-30 23:41:00,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:41:00,562 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-30 23:41:00,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 23:41:00,563 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-30 23:41:00,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:41:00,564 INFO L225 Difference]: With dead ends: 179 [2018-09-30 23:41:00,564 INFO L226 Difference]: Without dead ends: 177 [2018-09-30 23:41:00,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:41:00,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-30 23:41:00,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-30 23:41:00,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-30 23:41:00,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-09-30 23:41:00,574 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-09-30 23:41:00,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:41:00,574 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-09-30 23:41:00,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 23:41:00,574 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-09-30 23:41:00,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 23:41:00,575 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:41:00,575 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-09-30 23:41:00,576 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:41:00,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:41:00,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-09-30 23:41:00,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:41:00,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:41:00,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:00,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:41:00,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:00,585 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:41:00,585 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:41:00,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:41:00,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:41:00,990 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:41:00,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:41:00,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:41:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:41:04,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:41:04,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2018-09-30 23:41:04,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 23:41:04,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 23:41:04,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:41:04,885 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-09-30 23:41:10,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:41:10,470 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-30 23:41:10,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 23:41:10,471 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-09-30 23:41:10,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:41:10,472 INFO L225 Difference]: With dead ends: 181 [2018-09-30 23:41:10,472 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 23:41:10,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:41:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 23:41:10,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-30 23:41:10,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-30 23:41:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-30 23:41:10,480 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-09-30 23:41:10,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:41:10,480 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-30 23:41:10,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 23:41:10,481 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-30 23:41:10,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 23:41:10,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:41:10,481 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-09-30 23:41:10,481 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:41:10,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:41:10,482 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-09-30 23:41:10,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:41:10,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:41:10,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:10,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:41:10,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:41:10,491 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:41:10,491 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:41:10,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-09-30 23:41:10,504 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:42:10,235 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-30 23:42:10,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:42:10,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:42:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:14,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:42:14,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2018-09-30 23:42:14,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 23:42:14,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 23:42:14,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:42:14,224 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-09-30 23:42:20,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:42:20,699 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-30 23:42:20,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 23:42:20,700 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-30 23:42:20,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:42:20,701 INFO L225 Difference]: With dead ends: 183 [2018-09-30 23:42:20,701 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 23:42:20,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:42:20,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 23:42:20,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 23:42:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 23:42:20,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-09-30 23:42:20,709 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-09-30 23:42:20,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:42:20,709 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-09-30 23:42:20,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 23:42:20,709 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-09-30 23:42:20,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-30 23:42:20,710 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:42:20,710 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-09-30 23:42:20,710 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:42:20,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:42:20,710 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-09-30 23:42:20,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:42:20,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:42:20,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:20,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:42:20,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:20,717 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:42:20,717 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:42:20,717 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:42:20,724 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:42:21,169 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:42:21,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:42:21,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:42:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:25,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:42:25,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2018-09-30 23:42:25,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 23:42:25,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 23:42:25,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:42:25,269 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-09-30 23:42:31,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:42:31,067 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-30 23:42:31,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 23:42:31,068 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-09-30 23:42:31,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:42:31,069 INFO L225 Difference]: With dead ends: 185 [2018-09-30 23:42:31,069 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 23:42:31,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:42:31,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 23:42:31,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-30 23:42:31,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-30 23:42:31,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-30 23:42:31,078 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-09-30 23:42:31,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:42:31,078 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-30 23:42:31,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 23:42:31,078 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-30 23:42:31,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 23:42:31,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:42:31,079 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-09-30 23:42:31,079 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:42:31,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:42:31,079 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-09-30 23:42:31,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:42:31,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:42:31,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:31,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:42:31,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:31,086 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:42:31,086 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:42:31,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:42:31,103 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:42:31,788 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-30 23:42:31,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:42:31,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:42:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:35,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:42:35,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2018-09-30 23:42:35,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 23:42:35,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 23:42:35,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:42:35,933 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-09-30 23:42:41,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:42:41,862 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-30 23:42:41,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 23:42:41,863 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-30 23:42:41,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:42:41,864 INFO L225 Difference]: With dead ends: 187 [2018-09-30 23:42:41,864 INFO L226 Difference]: Without dead ends: 185 [2018-09-30 23:42:41,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:42:41,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-30 23:42:41,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-30 23:42:41,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 23:42:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-09-30 23:42:41,872 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-09-30 23:42:41,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:42:41,873 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-09-30 23:42:41,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 23:42:41,873 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-09-30 23:42:41,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-30 23:42:41,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:42:41,874 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-09-30 23:42:41,874 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:42:41,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:42:41,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-09-30 23:42:41,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:42:41,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:42:41,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:41,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:42:41,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:41,883 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:42:41,883 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:42:41,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:42:41,900 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:42:49,257 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-30 23:42:49,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:42:49,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:42:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:42:53,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:42:53,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2018-09-30 23:42:53,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 23:42:53,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 23:42:53,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:42:53,217 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-09-30 23:42:59,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:42:59,480 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-30 23:42:59,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 23:42:59,481 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-09-30 23:42:59,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:42:59,482 INFO L225 Difference]: With dead ends: 189 [2018-09-30 23:42:59,482 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 23:42:59,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:42:59,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 23:42:59,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 23:42:59,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 23:42:59,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-30 23:42:59,493 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-09-30 23:42:59,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:42:59,494 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-30 23:42:59,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 23:42:59,494 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-30 23:42:59,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-30 23:42:59,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:42:59,495 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-09-30 23:42:59,495 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:42:59,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:42:59,495 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-09-30 23:42:59,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:42:59,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:42:59,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:59,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:42:59,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:42:59,504 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:42:59,505 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:42:59,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:42:59,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:42:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:42:59,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:04,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:43:04,029 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2018-09-30 23:43:04,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 23:43:04,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 23:43:04,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:43:04,030 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-09-30 23:43:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:10,397 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-30 23:43:10,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 23:43:10,397 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-30 23:43:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:10,398 INFO L225 Difference]: With dead ends: 191 [2018-09-30 23:43:10,398 INFO L226 Difference]: Without dead ends: 189 [2018-09-30 23:43:10,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:43:10,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-30 23:43:10,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-30 23:43:10,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-30 23:43:10,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-09-30 23:43:10,408 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-09-30 23:43:10,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:10,409 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-09-30 23:43:10,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 23:43:10,409 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-09-30 23:43:10,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 23:43:10,410 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:10,410 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-09-30 23:43:10,410 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:10,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:10,410 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-09-30 23:43:10,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:10,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:10,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:10,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:10,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:10,419 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:43:10,420 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:43:10,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:43:10,438 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:43:10,908 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:43:10,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:10,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:15,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:43:15,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2018-09-30 23:43:15,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 23:43:15,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 23:43:15,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:43:15,257 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-09-30 23:43:21,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:21,566 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-30 23:43:21,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 23:43:21,567 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-09-30 23:43:21,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:21,568 INFO L225 Difference]: With dead ends: 193 [2018-09-30 23:43:21,568 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 23:43:21,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:43:21,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 23:43:21,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-30 23:43:21,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 23:43:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-30 23:43:21,576 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-09-30 23:43:21,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:21,576 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-30 23:43:21,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 23:43:21,576 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-30 23:43:21,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-30 23:43:21,577 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:21,577 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-09-30 23:43:21,577 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:21,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:21,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-09-30 23:43:21,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:21,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:21,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:21,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:21,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:21,585 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:43:21,585 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:43:21,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:43:21,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:44:43,774 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-30 23:44:43,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:43,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:48,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:44:48,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2018-09-30 23:44:48,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 23:44:48,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 23:44:48,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:44:48,115 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-09-30 23:44:54,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:44:54,524 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-30 23:44:54,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 23:44:54,524 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-30 23:44:54,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:44:54,526 INFO L225 Difference]: With dead ends: 195 [2018-09-30 23:44:54,526 INFO L226 Difference]: Without dead ends: 193 [2018-09-30 23:44:54,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:44:54,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-30 23:44:54,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-30 23:44:54,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 23:44:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-09-30 23:44:54,533 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-09-30 23:44:54,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:44:54,533 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-09-30 23:44:54,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 23:44:54,533 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-09-30 23:44:54,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-30 23:44:54,534 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:44:54,534 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-09-30 23:44:54,534 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:44:54,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:44:54,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-09-30 23:44:54,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:44:54,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:44:54,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:54,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:44:54,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:44:54,541 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:44:54,542 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:44:54,542 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:44:54,561 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:44:55,057 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:44:55,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:44:55,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:44:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:44:59,470 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:44:59,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2018-09-30 23:44:59,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 23:44:59,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 23:44:59,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:44:59,471 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-09-30 23:45:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:06,091 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-30 23:45:06,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 23:45:06,091 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-09-30 23:45:06,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:06,093 INFO L225 Difference]: With dead ends: 197 [2018-09-30 23:45:06,093 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 23:45:06,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:45:06,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 23:45:06,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-30 23:45:06,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 23:45:06,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-30 23:45:06,102 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-09-30 23:45:06,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:06,102 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-30 23:45:06,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 23:45:06,102 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-30 23:45:06,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 23:45:06,102 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:06,103 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-09-30 23:45:06,103 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:06,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:06,103 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-09-30 23:45:06,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:06,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:06,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:06,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:06,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:06,110 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:45:06,110 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:45:06,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:45:06,118 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:45:06,892 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-30 23:45:06,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:06,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:11,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:45:11,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2018-09-30 23:45:11,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 23:45:11,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 23:45:11,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=9313, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:45:11,348 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-09-30 23:45:18,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:18,159 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-09-30 23:45:18,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 23:45:18,160 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-09-30 23:45:18,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:18,161 INFO L225 Difference]: With dead ends: 199 [2018-09-30 23:45:18,161 INFO L226 Difference]: Without dead ends: 197 [2018-09-30 23:45:18,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=193, Invalid=9313, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:45:18,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-30 23:45:18,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-30 23:45:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-30 23:45:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-09-30 23:45:18,170 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-09-30 23:45:18,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:18,170 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-09-30 23:45:18,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 23:45:18,170 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-09-30 23:45:18,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-30 23:45:18,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:18,171 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-09-30 23:45:18,171 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:18,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:18,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-09-30 23:45:18,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:18,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:18,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:18,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:18,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:18,182 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:45:18,182 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:45:18,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:45:18,197 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:45:26,483 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-30 23:45:26,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:26,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:31,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:45:31,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2018-09-30 23:45:31,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 23:45:31,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 23:45:31,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=9507, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:45:31,154 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-09-30 23:45:38,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:38,058 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-30 23:45:38,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 23:45:38,059 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-09-30 23:45:38,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:38,060 INFO L225 Difference]: With dead ends: 201 [2018-09-30 23:45:38,060 INFO L226 Difference]: Without dead ends: 199 [2018-09-30 23:45:38,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=195, Invalid=9507, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:45:38,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-30 23:45:38,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-30 23:45:38,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-30 23:45:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-09-30 23:45:38,068 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-09-30 23:45:38,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:38,068 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-09-30 23:45:38,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 23:45:38,068 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-09-30 23:45:38,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-30 23:45:38,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:38,069 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-09-30 23:45:38,069 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:38,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:38,069 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-09-30 23:45:38,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:38,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:38,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:38,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:38,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:38,081 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:45:38,082 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:45:38,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:45:38,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:45:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:38,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:43,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:45:43,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2018-09-30 23:45:43,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 23:45:43,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 23:45:43,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=9703, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:45:43,328 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-09-30 23:45:50,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:50,265 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-09-30 23:45:50,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 23:45:50,266 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-09-30 23:45:50,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:50,267 INFO L225 Difference]: With dead ends: 203 [2018-09-30 23:45:50,267 INFO L226 Difference]: Without dead ends: 201 [2018-09-30 23:45:50,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=197, Invalid=9703, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:45:50,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-30 23:45:50,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-30 23:45:50,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-30 23:45:50,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-09-30 23:45:50,275 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-09-30 23:45:50,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:50,275 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-09-30 23:45:50,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 23:45:50,275 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-09-30 23:45:50,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 23:45:50,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:50,276 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-09-30 23:45:50,276 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:50,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:50,276 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-09-30 23:45:50,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:50,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:50,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:50,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:45:50,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:50,284 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:45:50,285 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:45:50,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:45:50,292 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:45:50,826 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:45:50,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:50,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:55,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 23:45:55,631 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2018-09-30 23:45:55,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 23:45:55,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 23:45:55,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=9901, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:45:55,632 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-09-30 23:46:02,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:46:02,660 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-30 23:46:02,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 23:46:02,661 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-09-30 23:46:02,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:46:02,662 INFO L225 Difference]: With dead ends: 205 [2018-09-30 23:46:02,662 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 23:46:02,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=199, Invalid=9901, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:46:02,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 23:46:02,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-30 23:46:02,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 23:46:02,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-09-30 23:46:02,669 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-09-30 23:46:02,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:46:02,669 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-09-30 23:46:02,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 23:46:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-09-30 23:46:02,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 23:46:02,670 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:46:02,670 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-09-30 23:46:02,671 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:46:02,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:46:02,671 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-09-30 23:46:02,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:46:02,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:46:02,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:02,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:46:02,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:46:02,680 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 23:46:02,680 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 23:46:02,680 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 23:46:02,695 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown