java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:19:02,897 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:19:02,901 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:19:02,915 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:19:02,916 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:19:02,917 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:19:02,918 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:19:02,920 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:19:02,921 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:19:02,922 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:19:02,923 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 10:19:02,953 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 10:19:02,980 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:19:02,981 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:19:02,982 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:19:02,982 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:19:02,983 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:19:02,983 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:19:02,983 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:19:02,983 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:19:02,983 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:19:02,984 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:19:02,984 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:19:02,984 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:19:02,984 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:19:02,984 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:19:02,987 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:19:02,987 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:19:02,988 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:19:02,988 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:19:02,988 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:19:02,988 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:19:02,988 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:19:02,989 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:19:02,989 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:19:02,989 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:19:02,989 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:19:02,989 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:19:02,990 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:19:02,990 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:19:02,990 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:19:02,990 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:19:03,033 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:19:03,046 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:19:03,054 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:19:03,056 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:19:03,057 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:19:03,058 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-30 10:19:03,059 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl' [2018-09-30 10:19:03,117 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:19:03,120 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:19:03,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:19:03,122 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:19:03,122 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:19:03,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:19:03" (1/1) ... [2018-09-30 10:19:03,157 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:19:03" (1/1) ... [2018-09-30 10:19:03,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:19:03,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:19:03,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:19:03,165 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:19:03,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:19:03" (1/1) ... [2018-09-30 10:19:03,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:19:03" (1/1) ... [2018-09-30 10:19:03,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:19:03" (1/1) ... [2018-09-30 10:19:03,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:19:03" (1/1) ... [2018-09-30 10:19:03,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:19:03" (1/1) ... [2018-09-30 10:19:03,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:19:03" (1/1) ... [2018-09-30 10:19:03,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:19:03" (1/1) ... [2018-09-30 10:19:03,186 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:19:03,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:19:03,187 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:19:03,187 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:19:03,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:19:03" (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 10:19:03,254 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 10:19:03,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 10:19:03,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 10:19:03,476 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 10:19:03,477 INFO L202 PluginConnector]: Adding new model gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:19:03 BoogieIcfgContainer [2018-09-30 10:19:03,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:19:03,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:19:03,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:19:03,483 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:19:03,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:19:03" (1/2) ... [2018-09-30 10:19:03,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@420463f2 and model type gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:19:03, skipping insertion in model container [2018-09-30 10:19:03,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:19:03" (2/2) ... [2018-09-30 10:19:03,488 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-30 10:19:03,498 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:19:03,508 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:19:03,567 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:19:03,568 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:19:03,568 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:19:03,568 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:19:03,568 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:19:03,568 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:19:03,569 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:19:03,569 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:19:03,569 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:19:03,588 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 10:19:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 10:19:03,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:03,609 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 10:19:03,612 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:03,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:03,620 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-09-30 10:19:03,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:03,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:03,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:03,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:03,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:03,715 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:03,715 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:03,715 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 10:19:03,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:03,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:03,832 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 10:19:03,884 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:19:03,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 10:19:03,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:19:03,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:19:03,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:19:03,911 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 10:19:03,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:03,964 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-30 10:19:03,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:19:03,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 10:19:03,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:03,977 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:19:03,977 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 10:19:03,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:19:04,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 10:19:04,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 10:19:04,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 10:19:04,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 10:19:04,019 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 10:19:04,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:04,020 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 10:19:04,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:19:04,020 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 10:19:04,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 10:19:04,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:04,021 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 10:19:04,021 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:04,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:04,022 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-09-30 10:19:04,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:04,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:04,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:04,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:04,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:04,036 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:04,036 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:04,036 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 10:19:04,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:04,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:04,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:04,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-09-30 10:19:04,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:19:04,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:19:04,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:19:04,199 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-30 10:19:04,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:04,280 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 10:19:04,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:19:04,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-30 10:19:04,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:04,282 INFO L225 Difference]: With dead ends: 8 [2018-09-30 10:19:04,282 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 10:19:04,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:19:04,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 10:19:04,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 10:19:04,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 10:19:04,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 10:19:04,286 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 10:19:04,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:04,287 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 10:19:04,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:19:04,287 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 10:19:04,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:19:04,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:04,288 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 10:19:04,288 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:04,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:04,289 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2018-09-30 10:19:04,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:04,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:04,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:04,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:04,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:04,298 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:04,298 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:04,298 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 10:19:04,314 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:04,327 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:04,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:04,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:04,470 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:04,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-09-30 10:19:04,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:19:04,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:19:04,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:19:04,471 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-30 10:19:04,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:04,564 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 10:19:04,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:19:04,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 10:19:04,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:04,566 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:19:04,566 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:19:04,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:19:04,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:19:04,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 10:19:04,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 10:19:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 10:19:04,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 10:19:04,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:04,570 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 10:19:04,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:19:04,571 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 10:19:04,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 10:19:04,571 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:04,571 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-30 10:19:04,572 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:04,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:04,572 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2018-09-30 10:19:04,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:04,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:04,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:04,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:04,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:04,582 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:04,582 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:04,582 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 10:19:04,600 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:04,621 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 10:19:04,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:04,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:04,916 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 10:19:04,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:04,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-09-30 10:19:04,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:19:04,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:19:04,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:19:04,938 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-30 10:19:05,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:05,024 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 10:19:05,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:19:05,025 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-30 10:19:05,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:05,026 INFO L225 Difference]: With dead ends: 10 [2018-09-30 10:19:05,026 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 10:19:05,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:19:05,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 10:19:05,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 10:19:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 10:19:05,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 10:19:05,030 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 10:19:05,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:05,031 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 10:19:05,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:19:05,031 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 10:19:05,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:19:05,031 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:05,032 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-30 10:19:05,032 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:05,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:05,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2018-09-30 10:19:05,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:05,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:05,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:05,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:05,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:05,044 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:05,044 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:05,044 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 10:19:05,055 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:19:05,069 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:05,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:05,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:05,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:05,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-09-30 10:19:05,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:19:05,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:19:05,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:19:05,302 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-30 10:19:05,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:05,390 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 10:19:05,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:19:05,390 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 10:19:05,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:05,391 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:19:05,392 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 10:19:05,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:19:05,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 10:19:05,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 10:19:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 10:19:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 10:19:05,397 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 10:19:05,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:05,397 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 10:19:05,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:19:05,397 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 10:19:05,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:19:05,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:05,398 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-30 10:19:05,398 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:05,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:05,399 INFO L82 PathProgramCache]: Analyzing trace with hash 317188140, now seen corresponding path program 5 times [2018-09-30 10:19:05,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:05,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:05,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:05,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:05,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:05,409 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:05,410 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:05,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:19:05,424 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:05,437 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 10:19:05,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:05,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:05,632 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:05,632 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-09-30 10:19:05,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:19:05,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:19:05,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:19:05,634 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-30 10:19:05,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:05,934 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 10:19:05,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:19:05,935 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-30 10:19:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:05,936 INFO L225 Difference]: With dead ends: 12 [2018-09-30 10:19:05,936 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 10:19:05,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:19:05,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 10:19:05,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 10:19:05,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:19:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 10:19:05,940 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 10:19:05,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:05,941 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 10:19:05,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:19:05,941 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 10:19:05,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:19:05,942 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:05,942 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-30 10:19:05,942 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:05,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:05,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1242899555, now seen corresponding path program 6 times [2018-09-30 10:19:05,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:05,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:05,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:05,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:05,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:05,960 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:05,960 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:05,960 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 10:19:05,982 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:06,003 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 10:19:06,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:06,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:06,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:06,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-09-30 10:19:06,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:19:06,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:19:06,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:19:06,240 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-30 10:19:06,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:06,338 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 10:19:06,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:19:06,339 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-30 10:19:06,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:06,340 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:19:06,340 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 10:19:06,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 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 10:19:06,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 10:19:06,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 10:19:06,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 10:19:06,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 10:19:06,344 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 10:19:06,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:06,344 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 10:19:06,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:19:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 10:19:06,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:19:06,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:06,345 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-30 10:19:06,345 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:06,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:06,346 INFO L82 PathProgramCache]: Analyzing trace with hash -124817652, now seen corresponding path program 7 times [2018-09-30 10:19:06,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:06,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:06,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:06,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:06,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:06,357 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:06,357 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:06,357 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 10:19:06,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:06,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:06,590 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:06,614 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:06,614 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-09-30 10:19:06,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:19:06,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:19:06,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:19:06,615 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-30 10:19:06,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:06,704 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 10:19:06,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:19:06,704 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-30 10:19:06,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:06,706 INFO L225 Difference]: With dead ends: 14 [2018-09-30 10:19:06,706 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 10:19:06,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:19:06,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 10:19:06,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 10:19:06,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:19:06,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 10:19:06,710 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 10:19:06,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:06,711 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 10:19:06,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:19:06,711 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 10:19:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:19:06,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:06,712 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-30 10:19:06,712 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:06,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:06,712 INFO L82 PathProgramCache]: Analyzing trace with hash 425621891, now seen corresponding path program 8 times [2018-09-30 10:19:06,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:06,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:06,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:06,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:06,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:06,722 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:06,723 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:06,723 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 10:19:06,735 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:06,750 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:06,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:06,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:06,976 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:06,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-09-30 10:19:06,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:19:06,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:19:06,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:19:06,978 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-30 10:19:07,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:07,137 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 10:19:07,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:19:07,137 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-30 10:19:07,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:07,138 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:19:07,139 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 10:19:07,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:19:07,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 10:19:07,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 10:19:07,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 10:19:07,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 10:19:07,144 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 10:19:07,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:07,144 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 10:19:07,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:19:07,144 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 10:19:07,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 10:19:07,145 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:07,145 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-30 10:19:07,145 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:07,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:07,145 INFO L82 PathProgramCache]: Analyzing trace with hash 309378540, now seen corresponding path program 9 times [2018-09-30 10:19:07,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:07,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:07,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:07,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:07,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:07,156 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:07,157 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:07,157 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 10:19:07,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:07,194 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:19:07,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:07,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:07,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:07,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-09-30 10:19:07,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:19:07,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:19:07,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:19:07,388 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-30 10:19:07,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:07,530 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 10:19:07,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:19:07,530 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-30 10:19:07,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:07,531 INFO L225 Difference]: With dead ends: 16 [2018-09-30 10:19:07,532 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 10:19:07,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:19:07,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 10:19:07,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 10:19:07,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:19:07,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 10:19:07,537 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 10:19:07,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:07,537 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 10:19:07,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:19:07,537 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 10:19:07,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:19:07,538 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:07,538 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-30 10:19:07,538 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:07,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:07,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1000801955, now seen corresponding path program 10 times [2018-09-30 10:19:07,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:07,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:07,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:07,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:07,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:07,550 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:07,550 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:07,550 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:19:07,563 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:19:07,580 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:07,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:07,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:07,785 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:07,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-09-30 10:19:07,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:19:07,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:19:07,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:19:07,787 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-30 10:19:07,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:07,924 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 10:19:07,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:19:07,924 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 10:19:07,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:07,925 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:19:07,925 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 10:19:07,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:19:07,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 10:19:07,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 10:19:07,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 10:19:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 10:19:07,933 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 10:19:07,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:07,933 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 10:19:07,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:19:07,934 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 10:19:07,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:19:07,934 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:07,934 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-30 10:19:07,935 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:07,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:07,935 INFO L82 PathProgramCache]: Analyzing trace with hash 960091340, now seen corresponding path program 11 times [2018-09-30 10:19:07,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:07,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:07,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:07,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:07,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:07,955 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:07,955 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:07,955 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 10:19:07,969 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:07,989 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:19:07,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:07,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:08,504 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:08,505 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-09-30 10:19:08,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:19:08,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:19:08,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:19:08,506 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-30 10:19:08,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:08,673 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 10:19:08,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:19:08,674 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 10:19:08,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:08,675 INFO L225 Difference]: With dead ends: 18 [2018-09-30 10:19:08,675 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 10:19:08,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:19:08,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 10:19:08,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 10:19:08,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:19:08,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 10:19:08,679 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 10:19:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:08,680 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 10:19:08,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:19:08,680 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 10:19:08,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:19:08,681 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:08,681 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-30 10:19:08,681 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:08,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:08,681 INFO L82 PathProgramCache]: Analyzing trace with hash -301937725, now seen corresponding path program 12 times [2018-09-30 10:19:08,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:08,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:08,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:08,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:08,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:08,692 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:08,693 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:08,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:19:08,713 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:08,737 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:19:08,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:08,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:09,254 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:09,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-09-30 10:19:09,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:19:09,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:19:09,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:19:09,256 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-30 10:19:09,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:09,518 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 10:19:09,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:19:09,522 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 10:19:09,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:09,522 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:19:09,523 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:19:09,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:19:09,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:19:09,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 10:19:09,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 10:19:09,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 10:19:09,530 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 10:19:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:09,530 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 10:19:09,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:19:09,531 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 10:19:09,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:19:09,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:09,531 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-30 10:19:09,532 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:09,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:09,532 INFO L82 PathProgramCache]: Analyzing trace with hash -770133076, now seen corresponding path program 13 times [2018-09-30 10:19:09,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:09,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:09,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:09,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:09,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:09,558 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:09,558 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:09,558 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 10:19:09,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:09,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:09,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:09,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-09-30 10:19:09,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:19:09,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:19:09,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:19:09,976 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-30 10:19:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:10,194 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 10:19:10,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:19:10,194 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-30 10:19:10,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:10,195 INFO L225 Difference]: With dead ends: 20 [2018-09-30 10:19:10,195 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 10:19:10,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:19:10,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 10:19:10,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 10:19:10,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:19:10,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 10:19:10,200 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 10:19:10,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:10,201 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 10:19:10,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:19:10,201 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 10:19:10,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:19:10,201 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:10,202 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-30 10:19:10,202 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:10,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:10,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1895680227, now seen corresponding path program 14 times [2018-09-30 10:19:10,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:10,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:10,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:10,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:10,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:10,212 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:10,212 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:10,212 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 10:19:10,224 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:10,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:10,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:10,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:10,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:10,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-09-30 10:19:10,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:19:10,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:19:10,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:19:10,795 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-30 10:19:11,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:11,034 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 10:19:11,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:19:11,036 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-30 10:19:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:11,037 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:19:11,037 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:19:11,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:19:11,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:19:11,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 10:19:11,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 10:19:11,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 10:19:11,041 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 10:19:11,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:11,042 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 10:19:11,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:19:11,042 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 10:19:11,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:19:11,042 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:11,042 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-30 10:19:11,043 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:11,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:11,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1363453300, now seen corresponding path program 15 times [2018-09-30 10:19:11,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:11,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:11,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:11,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:11,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:11,053 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:11,053 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:11,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:19:11,065 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:11,112 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:19:11,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:11,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:11,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:11,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-09-30 10:19:11,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:19:11,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:19:11,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:19:11,370 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-30 10:19:11,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:11,624 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 10:19:11,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:19:11,632 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-30 10:19:11,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:11,632 INFO L225 Difference]: With dead ends: 22 [2018-09-30 10:19:11,633 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 10:19:11,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:19:11,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 10:19:11,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 10:19:11,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:19:11,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 10:19:11,644 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 10:19:11,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:11,644 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 10:19:11,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:19:11,644 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 10:19:11,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:19:11,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:11,645 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-30 10:19:11,645 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:11,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:11,646 INFO L82 PathProgramCache]: Analyzing trace with hash 682622467, now seen corresponding path program 16 times [2018-09-30 10:19:11,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:11,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:11,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:11,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:11,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:11,663 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:11,663 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:11,663 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:19:11,674 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:19:11,703 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:11,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:11,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:13,220 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:13,241 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:13,241 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-09-30 10:19:13,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:19:13,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:19:13,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:19:13,242 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-30 10:19:13,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:13,654 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 10:19:13,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:19:13,656 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-30 10:19:13,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:13,656 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:19:13,656 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:19:13,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:19:13,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:19:13,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 10:19:13,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 10:19:13,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 10:19:13,660 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 10:19:13,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:13,660 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 10:19:13,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:19:13,661 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 10:19:13,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:19:13,661 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:13,661 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-30 10:19:13,661 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:13,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:13,662 INFO L82 PathProgramCache]: Analyzing trace with hash -313538196, now seen corresponding path program 17 times [2018-09-30 10:19:13,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:13,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:13,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:13,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:13,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:13,672 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:13,672 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:13,672 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:19:13,685 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:13,712 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 10:19:13,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:13,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:14,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:14,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-09-30 10:19:14,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:19:14,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:19:14,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:19:14,052 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-30 10:19:14,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:14,556 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 10:19:14,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:19:14,557 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-30 10:19:14,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:14,558 INFO L225 Difference]: With dead ends: 24 [2018-09-30 10:19:14,558 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 10:19:14,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:19:14,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 10:19:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 10:19:14,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:19:14,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 10:19:14,567 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 10:19:14,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:14,567 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 10:19:14,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:19:14,567 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 10:19:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:19:14,568 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:14,568 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-30 10:19:14,568 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:14,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:14,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1129747677, now seen corresponding path program 18 times [2018-09-30 10:19:14,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:14,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:14,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:14,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:14,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:14,587 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:14,590 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:14,590 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 10:19:14,599 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:14,637 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 10:19:14,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:14,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:15,034 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:15,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-09-30 10:19:15,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:19:15,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:19:15,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:19:15,036 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-30 10:19:15,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:15,436 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 10:19:15,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:19:15,437 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-30 10:19:15,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:15,438 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:19:15,438 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:19:15,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 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 10:19:15,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:19:15,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 10:19:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 10:19:15,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 10:19:15,444 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 10:19:15,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:15,444 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 10:19:15,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:19:15,444 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 10:19:15,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:19:15,445 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:15,445 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-30 10:19:15,445 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:15,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:15,446 INFO L82 PathProgramCache]: Analyzing trace with hash -662437812, now seen corresponding path program 19 times [2018-09-30 10:19:15,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:15,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:15,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:15,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:15,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:15,454 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:15,455 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:15,455 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 10:19:15,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:15,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:15,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:15,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-09-30 10:19:15,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:19:15,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:19:15,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:19:15,871 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-30 10:19:16,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:16,249 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 10:19:16,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:19:16,249 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-30 10:19:16,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:16,250 INFO L225 Difference]: With dead ends: 26 [2018-09-30 10:19:16,251 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 10:19:16,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:19:16,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 10:19:16,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 10:19:16,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:19:16,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 10:19:16,257 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 10:19:16,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:16,258 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 10:19:16,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:19:16,258 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 10:19:16,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 10:19:16,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:16,259 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-30 10:19:16,259 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:16,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:16,259 INFO L82 PathProgramCache]: Analyzing trace with hash 939266115, now seen corresponding path program 20 times [2018-09-30 10:19:16,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:16,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:16,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:16,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:16,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:16,271 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:16,272 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:16,272 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 10:19:16,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:16,316 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:16,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:16,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:16,724 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 10:19:16,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:16,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-09-30 10:19:16,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:19:16,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:19:16,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:19:16,748 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-30 10:19:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:17,255 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 10:19:17,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:19:17,256 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-30 10:19:17,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:17,256 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:19:17,256 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:19:17,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:19:17,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:19:17,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 10:19:17,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 10:19:17,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 10:19:17,262 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 10:19:17,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:17,262 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 10:19:17,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:19:17,262 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 10:19:17,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:19:17,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:17,263 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-30 10:19:17,263 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:17,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:17,264 INFO L82 PathProgramCache]: Analyzing trace with hash -947519700, now seen corresponding path program 21 times [2018-09-30 10:19:17,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:17,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:17,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:17,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:17,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:17,271 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:17,271 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:17,271 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 10:19:17,279 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:17,406 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 10:19:17,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:17,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:17,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:17,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-09-30 10:19:17,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:19:17,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:19:17,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:19:17,851 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-30 10:19:18,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:18,231 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 10:19:18,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:19:18,233 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-30 10:19:18,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:18,234 INFO L225 Difference]: With dead ends: 28 [2018-09-30 10:19:18,234 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 10:19:18,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:19:18,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 10:19:18,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 10:19:18,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:19:18,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 10:19:18,238 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 10:19:18,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:18,239 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 10:19:18,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:19:18,239 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 10:19:18,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 10:19:18,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:18,240 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-30 10:19:18,240 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:18,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:18,240 INFO L82 PathProgramCache]: Analyzing trace with hash 691662179, now seen corresponding path program 22 times [2018-09-30 10:19:18,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:18,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:18,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:18,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:18,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:18,248 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:18,249 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:18,249 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 10:19:18,274 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:19:18,319 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:18,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:18,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:18,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:18,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-09-30 10:19:18,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 10:19:18,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 10:19:18,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:19:18,881 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-30 10:19:19,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:19,672 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 10:19:19,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:19:19,674 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-30 10:19:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:19,674 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:19:19,674 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:19:19,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:19:19,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:19:19,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 10:19:19,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 10:19:19,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 10:19:19,679 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 10:19:19,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:19,680 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 10:19:19,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 10:19:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 10:19:19,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:19:19,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:19,681 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-30 10:19:19,681 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:19,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:19,681 INFO L82 PathProgramCache]: Analyzing trace with hash -33307124, now seen corresponding path program 23 times [2018-09-30 10:19:19,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:19,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:19,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:19,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:19,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:19,688 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:19,689 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:19,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:19:19,712 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:19,750 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 10:19:19,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:19,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:20,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:20,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-09-30 10:19:20,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:19:20,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:19:20,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:19:20,388 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-30 10:19:20,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:20,980 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 10:19:20,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:19:20,981 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-30 10:19:20,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:20,981 INFO L225 Difference]: With dead ends: 30 [2018-09-30 10:19:20,982 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 10:19:20,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:19:20,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 10:19:20,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 10:19:20,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:19:20,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 10:19:20,988 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 10:19:20,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:20,988 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 10:19:20,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:19:20,989 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 10:19:20,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 10:19:20,989 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:20,989 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-30 10:19:20,990 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:20,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:20,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1032519037, now seen corresponding path program 24 times [2018-09-30 10:19:20,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:20,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:20,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:20,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:20,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:20,998 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:20,998 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:20,998 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 10:19:21,020 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:21,081 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 10:19:21,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:21,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:21,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:21,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-09-30 10:19:21,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 10:19:21,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 10:19:21,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:19:21,559 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-30 10:19:22,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:22,072 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 10:19:22,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:19:22,072 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-30 10:19:22,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:22,073 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:19:22,073 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:19:22,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:19:22,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:19:22,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 10:19:22,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 10:19:22,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 10:19:22,080 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 10:19:22,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:22,080 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 10:19:22,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 10:19:22,080 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 10:19:22,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 10:19:22,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:22,081 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-30 10:19:22,082 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:22,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:22,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1943317268, now seen corresponding path program 25 times [2018-09-30 10:19:22,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:22,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:22,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:22,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:22,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:22,091 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:22,091 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:22,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 10:19:22,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:22,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:22,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:22,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-09-30 10:19:22,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:19:22,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:19:22,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:19:22,665 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-30 10:19:23,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:23,163 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 10:19:23,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:19:23,164 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-30 10:19:23,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:23,164 INFO L225 Difference]: With dead ends: 32 [2018-09-30 10:19:23,164 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 10:19:23,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 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 10:19:23,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 10:19:23,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 10:19:23,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:19:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 10:19:23,170 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 10:19:23,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:23,170 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 10:19:23,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:19:23,170 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 10:19:23,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 10:19:23,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:23,171 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-30 10:19:23,171 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:23,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:23,172 INFO L82 PathProgramCache]: Analyzing trace with hash -113291357, now seen corresponding path program 26 times [2018-09-30 10:19:23,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:23,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:23,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:23,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:23,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:23,180 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:23,180 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:23,180 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 10:19:23,196 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:23,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:23,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:23,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:23,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:23,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-09-30 10:19:23,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:19:23,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:19:23,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:19:23,862 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-30 10:19:24,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:24,542 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 10:19:24,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:19:24,543 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-30 10:19:24,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:24,543 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:19:24,543 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:19:24,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:19:24,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:19:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 10:19:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 10:19:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 10:19:24,549 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 10:19:24,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:24,549 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 10:19:24,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:19:24,550 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 10:19:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 10:19:24,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:24,550 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-30 10:19:24,550 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:24,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:24,551 INFO L82 PathProgramCache]: Analyzing trace with hash 782937036, now seen corresponding path program 27 times [2018-09-30 10:19:24,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:24,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:24,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:24,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:24,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:24,558 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:24,558 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:24,558 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 10:19:24,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:24,869 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 10:19:24,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:24,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:25,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:25,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-09-30 10:19:25,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:19:25,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:19:25,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:19:25,465 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-30 10:19:26,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:26,074 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 10:19:26,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:19:26,075 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-30 10:19:26,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:26,075 INFO L225 Difference]: With dead ends: 34 [2018-09-30 10:19:26,075 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 10:19:26,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:19:26,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 10:19:26,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 10:19:26,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:19:26,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 10:19:26,082 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 10:19:26,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:26,083 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 10:19:26,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:19:26,083 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 10:19:26,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 10:19:26,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:26,084 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-30 10:19:26,084 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:26,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:26,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1498753853, now seen corresponding path program 28 times [2018-09-30 10:19:26,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:26,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:26,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:26,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:26,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:26,092 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:26,092 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:26,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-09-30 10:19:26,114 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 10:19:26,160 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:26,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:26,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:26,753 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:26,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-09-30 10:19:26,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 10:19:26,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 10:19:26,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:19:26,754 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-30 10:19:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:27,383 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 10:19:27,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:19:27,384 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-30 10:19:27,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:27,384 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:19:27,385 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:19:27,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:19:27,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:19:27,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 10:19:27,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 10:19:27,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 10:19:27,390 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 10:19:27,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:27,391 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 10:19:27,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 10:19:27,391 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 10:19:27,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:19:27,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:27,392 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-30 10:19:27,392 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:27,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:27,392 INFO L82 PathProgramCache]: Analyzing trace with hash 783272620, now seen corresponding path program 29 times [2018-09-30 10:19:27,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:27,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:27,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:27,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:27,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:27,400 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:27,400 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:27,400 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 10:19:27,417 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:27,486 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 10:19:27,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:27,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:28,194 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:28,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-09-30 10:19:28,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:19:28,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:19:28,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:19:28,196 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-30 10:19:28,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:28,856 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 10:19:28,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:19:28,857 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-30 10:19:28,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:28,858 INFO L225 Difference]: With dead ends: 36 [2018-09-30 10:19:28,858 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 10:19:28,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:19:28,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 10:19:28,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 10:19:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:19:28,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 10:19:28,862 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 10:19:28,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:28,863 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 10:19:28,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:19:28,863 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 10:19:28,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:19:28,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:28,863 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-30 10:19:28,864 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:28,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:28,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1488350749, now seen corresponding path program 30 times [2018-09-30 10:19:28,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:28,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:28,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:28,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:28,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:28,871 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:28,871 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:28,872 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 10:19:28,894 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:29,080 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 10:19:29,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:29,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:30,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:30,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-09-30 10:19:30,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 10:19:30,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 10:19:30,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:19:30,427 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-30 10:19:31,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:31,134 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 10:19:31,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:19:31,134 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-30 10:19:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:31,135 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:19:31,135 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:19:31,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:19:31,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:19:31,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 10:19:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 10:19:31,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 10:19:31,139 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 10:19:31,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:31,140 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 10:19:31,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 10:19:31,140 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 10:19:31,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 10:19:31,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:31,141 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-30 10:19:31,141 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:31,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:31,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1105768844, now seen corresponding path program 31 times [2018-09-30 10:19:31,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:31,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:31,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:31,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:31,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:31,149 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:31,149 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:31,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:19:31,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:31,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:31,872 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:31,872 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-09-30 10:19:31,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:19:31,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:19:31,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:19:31,873 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-30 10:19:32,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:32,627 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 10:19:32,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:19:32,627 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-30 10:19:32,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:32,628 INFO L225 Difference]: With dead ends: 38 [2018-09-30 10:19:32,628 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 10:19:32,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:19:32,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 10:19:32,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 10:19:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 10:19:32,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 10:19:32,634 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 10:19:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:32,634 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 10:19:32,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:19:32,634 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 10:19:32,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 10:19:32,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:32,635 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-30 10:19:32,635 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:32,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:32,635 INFO L82 PathProgramCache]: Analyzing trace with hash -80902397, now seen corresponding path program 32 times [2018-09-30 10:19:32,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:32,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:32,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:32,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:32,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:32,643 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:32,643 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:32,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:19:32,658 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:32,713 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:32,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:32,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:33,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:33,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-09-30 10:19:33,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:19:33,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:19:33,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:19:33,426 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-30 10:19:34,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:34,321 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 10:19:34,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:19:34,321 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-30 10:19:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:34,322 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:19:34,322 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:19:34,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:19:34,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:19:34,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 10:19:34,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 10:19:34,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 10:19:34,328 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 10:19:34,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:34,328 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 10:19:34,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:19:34,329 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 10:19:34,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 10:19:34,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:34,329 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-30 10:19:34,330 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:34,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:34,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1786994796, now seen corresponding path program 33 times [2018-09-30 10:19:34,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:34,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:34,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:34,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:34,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:34,338 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:34,338 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:34,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 10:19:34,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:35,014 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 10:19:35,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:35,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:35,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:35,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-09-30 10:19:35,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:19:35,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:19:35,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:19:35,895 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-30 10:19:36,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:36,737 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 10:19:36,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:19:36,738 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-30 10:19:36,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:36,738 INFO L225 Difference]: With dead ends: 40 [2018-09-30 10:19:36,739 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 10:19:36,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:19:36,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 10:19:36,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 10:19:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 10:19:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 10:19:36,744 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 10:19:36,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:36,744 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 10:19:36,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:19:36,744 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 10:19:36,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 10:19:36,745 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:36,745 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-30 10:19:36,745 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:36,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:36,745 INFO L82 PathProgramCache]: Analyzing trace with hash -437734365, now seen corresponding path program 34 times [2018-09-30 10:19:36,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:36,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:36,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:36,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:36,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:36,753 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:36,753 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:36,753 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 10:19:36,763 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:19:36,826 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:36,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:36,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:37,567 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:37,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-09-30 10:19:37,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 10:19:37,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 10:19:37,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:19:37,569 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-30 10:19:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:38,464 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 10:19:38,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:19:38,464 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-30 10:19:38,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:38,465 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:19:38,465 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:19:38,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:19:38,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:19:38,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 10:19:38,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 10:19:38,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 10:19:38,470 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 10:19:38,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:38,470 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 10:19:38,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 10:19:38,471 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 10:19:38,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 10:19:38,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:38,471 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-30 10:19:38,472 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:38,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:38,472 INFO L82 PathProgramCache]: Analyzing trace with hash -684861620, now seen corresponding path program 35 times [2018-09-30 10:19:38,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:38,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:38,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:38,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:38,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:38,480 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:38,480 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:38,480 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 10:19:38,496 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:38,563 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 10:19:38,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:38,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:39,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:39,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-09-30 10:19:39,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:19:39,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:19:39,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:19:39,430 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-30 10:19:40,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:40,663 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 10:19:40,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:19:40,664 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-30 10:19:40,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:40,665 INFO L225 Difference]: With dead ends: 42 [2018-09-30 10:19:40,665 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 10:19:40,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:19:40,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 10:19:40,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 10:19:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 10:19:40,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 10:19:40,670 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 10:19:40,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:40,670 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 10:19:40,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:19:40,670 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 10:19:40,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 10:19:40,671 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:40,671 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-30 10:19:40,671 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:40,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:40,672 INFO L82 PathProgramCache]: Analyzing trace with hash 244128067, now seen corresponding path program 36 times [2018-09-30 10:19:40,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:40,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:40,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:40,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:40,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:40,679 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:40,679 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:40,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-09-30 10:19:40,693 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 10:19:40,903 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 10:19:40,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:40,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:41,752 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:41,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-09-30 10:19:41,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 10:19:41,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 10:19:41,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:19:41,754 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-30 10:19:42,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:42,843 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 10:19:42,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:19:42,843 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-30 10:19:42,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:42,844 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:19:42,844 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:19:42,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:19:42,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:19:42,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 10:19:42,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 10:19:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 10:19:42,849 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 10:19:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:42,849 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 10:19:42,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 10:19:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 10:19:42,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 10:19:42,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:42,850 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-30 10:19:42,850 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:42,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:42,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1021962708, now seen corresponding path program 37 times [2018-09-30 10:19:42,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:42,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:42,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:42,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:42,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:42,858 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:42,858 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:42,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:19:42,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:42,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:43,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:43,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-09-30 10:19:43,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:19:43,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:19:43,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:19:43,821 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-30 10:19:44,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:44,987 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 10:19:44,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:19:44,987 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-30 10:19:44,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:44,988 INFO L225 Difference]: With dead ends: 44 [2018-09-30 10:19:44,988 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 10:19:44,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:19:44,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 10:19:44,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 10:19:44,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 10:19:44,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 10:19:44,992 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 10:19:44,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:44,992 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 10:19:44,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:19:44,992 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 10:19:44,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 10:19:44,993 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:44,993 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-30 10:19:44,993 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:44,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:44,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1616071069, now seen corresponding path program 38 times [2018-09-30 10:19:44,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:44,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:44,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:44,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:44,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:45,001 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:45,001 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:45,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:19:45,010 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:45,074 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:45,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:45,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:45,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:45,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-09-30 10:19:45,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:19:45,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:19:45,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:19:45,995 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-30 10:19:47,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:47,082 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 10:19:47,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:19:47,082 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-30 10:19:47,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:47,083 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:19:47,083 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:19:47,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:19:47,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:19:47,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 10:19:47,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 10:19:47,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 10:19:47,088 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 10:19:47,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:47,088 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 10:19:47,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:19:47,088 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 10:19:47,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 10:19:47,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:47,088 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-30 10:19:47,089 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:47,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:47,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1441406220, now seen corresponding path program 39 times [2018-09-30 10:19:47,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:47,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:47,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:47,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:47,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:47,096 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:47,096 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:47,096 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 10:19:47,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:48,536 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 10:19:48,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:48,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:49,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:49,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-09-30 10:19:49,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:19:49,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:19:49,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:19:49,397 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-30 10:19:50,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:50,763 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 10:19:50,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:19:50,764 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-30 10:19:50,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:50,765 INFO L225 Difference]: With dead ends: 46 [2018-09-30 10:19:50,765 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 10:19:50,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:19:50,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 10:19:50,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 10:19:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 10:19:50,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 10:19:50,770 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 10:19:50,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:50,770 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 10:19:50,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:19:50,770 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 10:19:50,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 10:19:50,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:50,771 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-30 10:19:50,771 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:50,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:50,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1733921667, now seen corresponding path program 40 times [2018-09-30 10:19:50,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:50,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:50,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:50,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:50,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:50,795 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:50,796 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:50,796 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:19:50,807 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:19:50,904 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:50,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:50,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:52,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:52,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-09-30 10:19:52,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 10:19:52,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 10:19:52,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:19:52,229 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-30 10:19:53,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:53,566 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 10:19:53,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:19:53,566 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-30 10:19:53,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:53,567 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:19:53,567 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:19:53,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:19:53,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:19:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 10:19:53,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 10:19:53,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 10:19:53,572 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 10:19:53,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:53,572 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 10:19:53,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 10:19:53,572 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 10:19:53,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 10:19:53,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:53,573 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-30 10:19:53,573 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:53,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:53,573 INFO L82 PathProgramCache]: Analyzing trace with hash -2083001364, now seen corresponding path program 41 times [2018-09-30 10:19:53,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:53,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:53,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:53,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:53,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:53,581 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:53,581 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:53,581 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 10:19:53,595 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:53,717 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 10:19:53,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:53,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:54,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:54,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-09-30 10:19:54,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:19:54,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:19:54,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:19:54,878 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-30 10:19:56,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:56,307 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 10:19:56,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:19:56,308 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-30 10:19:56,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:56,308 INFO L225 Difference]: With dead ends: 48 [2018-09-30 10:19:56,308 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 10:19:56,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:19:56,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 10:19:56,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 10:19:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 10:19:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 10:19:56,313 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 10:19:56,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:56,314 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 10:19:56,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:19:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 10:19:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 10:19:56,314 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:56,314 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-30 10:19:56,314 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:56,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:56,315 INFO L82 PathProgramCache]: Analyzing trace with hash -148531037, now seen corresponding path program 42 times [2018-09-30 10:19:56,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:56,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:56,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:56,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:56,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:56,321 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:19:56,321 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:19:56,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:19:56,336 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:56,814 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 10:19:56,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:56,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:59,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:19:59,007 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-09-30 10:19:59,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 10:19:59,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 10:19:59,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:19:59,008 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-30 10:20:00,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:00,564 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 10:20:00,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:20:00,564 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-30 10:20:00,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:00,565 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:20:00,565 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:20:00,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:20:00,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:20:00,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 10:20:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 10:20:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 10:20:00,571 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-30 10:20:00,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:00,571 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 10:20:00,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 10:20:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 10:20:00,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 10:20:00,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:00,572 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-30 10:20:00,572 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:00,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:00,573 INFO L82 PathProgramCache]: Analyzing trace with hash -309493044, now seen corresponding path program 43 times [2018-09-30 10:20:00,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:00,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:00,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:00,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:00,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:00,580 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:20:00,580 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:20:00,580 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 10:20:00,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:00,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:01,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:20:01,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-09-30 10:20:01,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:20:01,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:20:01,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:20:01,854 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-30 10:20:03,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:03,433 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 10:20:03,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:20:03,433 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-30 10:20:03,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:03,434 INFO L225 Difference]: With dead ends: 50 [2018-09-30 10:20:03,434 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 10:20:03,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:20:03,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 10:20:03,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 10:20:03,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 10:20:03,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 10:20:03,439 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-30 10:20:03,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:03,439 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 10:20:03,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:20:03,439 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 10:20:03,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 10:20:03,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:03,440 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-30 10:20:03,440 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:03,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:03,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1004347965, now seen corresponding path program 44 times [2018-09-30 10:20:03,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:03,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:03,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:03,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:03,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:03,448 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:20:03,448 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:20:03,448 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 10:20:03,461 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:20:03,568 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:20:03,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:03,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:04,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:20:04,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-09-30 10:20:04,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:20:04,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:20:04,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:20:04,651 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-30 10:20:06,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:06,300 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 10:20:06,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:20:06,301 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-30 10:20:06,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:06,302 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:20:06,302 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:20:06,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:20:06,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:20:06,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 10:20:06,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 10:20:06,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 10:20:06,307 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-30 10:20:06,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:06,307 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 10:20:06,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:20:06,308 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 10:20:06,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 10:20:06,308 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:06,308 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-30 10:20:06,309 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:06,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:06,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1070014036, now seen corresponding path program 45 times [2018-09-30 10:20:06,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:06,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:06,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:06,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:06,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:06,317 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:20:06,317 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:20:06,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:20:06,333 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:20:08,904 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 10:20:08,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:08,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:10,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:20:10,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-09-30 10:20:10,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:20:10,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:20:10,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:20:10,275 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-30 10:20:11,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:11,962 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 10:20:11,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:20:11,962 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-30 10:20:11,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:11,963 INFO L225 Difference]: With dead ends: 52 [2018-09-30 10:20:11,963 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 10:20:11,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:20:11,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 10:20:11,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 10:20:11,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 10:20:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 10:20:11,968 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-30 10:20:11,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:11,968 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 10:20:11,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:20:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 10:20:11,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 10:20:11,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:11,969 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-30 10:20:11,969 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:11,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:11,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1189305059, now seen corresponding path program 46 times [2018-09-30 10:20:11,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:11,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:11,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:11,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:11,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:11,977 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:20:11,978 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:20:11,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:20:11,992 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:20:12,117 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:20:12,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:12,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:13,795 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:20:13,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-09-30 10:20:13,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 10:20:13,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 10:20:13,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:20:13,797 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-30 10:20:15,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:15,432 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 10:20:15,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:20:15,433 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-30 10:20:15,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:15,433 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:20:15,434 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:20:15,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:20:15,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:20:15,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 10:20:15,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 10:20:15,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 10:20:15,438 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-30 10:20:15,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:15,438 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 10:20:15,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 10:20:15,438 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 10:20:15,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 10:20:15,439 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:15,439 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-30 10:20:15,439 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:15,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:15,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1786247028, now seen corresponding path program 47 times [2018-09-30 10:20:15,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:15,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:15,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:15,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:15,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:15,447 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:20:15,447 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:20:15,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:20:15,454 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:20:15,578 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 10:20:15,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:15,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:16,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:20:16,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-09-30 10:20:16,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:20:16,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:20:16,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:20:16,889 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-30 10:20:18,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:18,561 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 10:20:18,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:20:18,562 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-30 10:20:18,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:18,563 INFO L225 Difference]: With dead ends: 54 [2018-09-30 10:20:18,563 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 10:20:18,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:20:18,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 10:20:18,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 10:20:18,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 10:20:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 10:20:18,569 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-30 10:20:18,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:18,569 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 10:20:18,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:20:18,569 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 10:20:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 10:20:18,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:18,570 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-30 10:20:18,570 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:18,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:18,570 INFO L82 PathProgramCache]: Analyzing trace with hash 460918787, now seen corresponding path program 48 times [2018-09-30 10:20:18,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:18,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:18,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:18,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:18,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:18,578 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:20:18,578 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:20:18,578 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 10:20:18,585 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:20:19,284 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 10:20:19,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:19,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:20,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:20:20,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-09-30 10:20:20,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 10:20:20,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 10:20:20,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:20:20,543 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-30 10:20:22,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:22,411 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 10:20:22,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:20:22,412 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-30 10:20:22,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:22,413 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:20:22,413 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:20:22,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:20:22,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:20:22,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 10:20:22,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 10:20:22,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 10:20:22,418 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-30 10:20:22,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:22,419 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 10:20:22,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 10:20:22,419 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 10:20:22,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 10:20:22,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:22,419 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-30 10:20:22,420 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:22,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:22,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1403582316, now seen corresponding path program 49 times [2018-09-30 10:20:22,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:22,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:22,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:22,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:22,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:22,428 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:20:22,428 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:20:22,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:20:22,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:22,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:23,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:20:23,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-09-30 10:20:23,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:20:23,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:20:23,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:20:23,883 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-30 10:20:25,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:25,785 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-30 10:20:25,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:20:25,786 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-30 10:20:25,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:25,786 INFO L225 Difference]: With dead ends: 56 [2018-09-30 10:20:25,786 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 10:20:25,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 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 10:20:25,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 10:20:25,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 10:20:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 10:20:25,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 10:20:25,790 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-30 10:20:25,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:25,790 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 10:20:25,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:20:25,790 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 10:20:25,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 10:20:25,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:25,791 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-30 10:20:25,791 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:25,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:25,791 INFO L82 PathProgramCache]: Analyzing trace with hash 561380643, now seen corresponding path program 50 times [2018-09-30 10:20:25,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:25,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:25,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:25,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:25,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:25,800 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:20:25,800 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:20:25,800 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 10:20:25,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:20:25,946 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:20:25,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:25,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:27,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:20:27,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-09-30 10:20:27,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:20:27,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:20:27,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:20:27,936 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-30 10:20:29,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:29,918 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 10:20:29,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:20:29,919 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-30 10:20:29,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:29,920 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:20:29,920 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:20:29,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:20:29,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:20:29,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 10:20:29,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 10:20:29,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 10:20:29,924 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-30 10:20:29,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:29,924 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 10:20:29,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:20:29,925 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 10:20:29,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 10:20:29,925 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:29,925 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-30 10:20:29,925 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:29,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:29,926 INFO L82 PathProgramCache]: Analyzing trace with hash 222932556, now seen corresponding path program 51 times [2018-09-30 10:20:29,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:29,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:29,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:29,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:29,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:29,934 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:20:29,934 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:20:29,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:20:29,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:20:34,370 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 10:20:34,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:34,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:35,855 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:20:35,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-09-30 10:20:35,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:20:35,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:20:35,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:20:35,857 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-30 10:20:37,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:37,983 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-30 10:20:37,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:20:37,983 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-30 10:20:37,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:37,984 INFO L225 Difference]: With dead ends: 58 [2018-09-30 10:20:37,984 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 10:20:37,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:20:37,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 10:20:37,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 10:20:37,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 10:20:37,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 10:20:37,990 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-30 10:20:37,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:37,990 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 10:20:37,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:20:37,991 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 10:20:37,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 10:20:37,991 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:37,991 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-30 10:20:37,991 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:37,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:37,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1679023549, now seen corresponding path program 52 times [2018-09-30 10:20:37,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:37,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:37,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:37,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:37,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:37,999 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:20:37,999 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:20:38,000 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:20:38,017 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:20:38,131 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:20:38,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:38,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:39,590 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:20:39,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-09-30 10:20:39,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 10:20:39,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 10:20:39,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:20:39,592 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-30 10:20:41,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:41,838 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 10:20:41,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:20:41,839 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-30 10:20:41,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:41,840 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:20:41,840 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:20:41,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:20:41,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:20:41,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 10:20:41,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 10:20:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 10:20:41,845 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-30 10:20:41,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:41,845 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 10:20:41,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 10:20:41,845 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 10:20:41,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 10:20:41,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:41,846 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-30 10:20:41,846 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:41,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:41,846 INFO L82 PathProgramCache]: Analyzing trace with hash -510120660, now seen corresponding path program 53 times [2018-09-30 10:20:41,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:41,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:41,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:41,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:41,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:41,855 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:20:41,855 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:20:41,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:20:41,869 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:20:42,081 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 10:20:42,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:42,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:43,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:20:43,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-09-30 10:20:43,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:20:43,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:20:43,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:20:43,723 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-30 10:20:45,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:45,844 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-30 10:20:45,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:20:45,844 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-30 10:20:45,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:45,845 INFO L225 Difference]: With dead ends: 60 [2018-09-30 10:20:45,845 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 10:20:45,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:20:45,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 10:20:45,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 10:20:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 10:20:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 10:20:45,851 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-30 10:20:45,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:45,851 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 10:20:45,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:20:45,851 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 10:20:45,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 10:20:45,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:45,852 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-30 10:20:45,852 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:45,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:45,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1366130531, now seen corresponding path program 54 times [2018-09-30 10:20:45,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:45,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:45,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:45,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:45,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:45,859 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:20:45,860 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:20:45,860 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 10:20:45,869 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:20:47,224 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 10:20:47,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:47,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:48,820 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:20:48,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-09-30 10:20:48,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 10:20:48,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 10:20:48,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:20:48,821 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-30 10:20:50,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:50,989 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 10:20:50,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:20:50,990 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-30 10:20:50,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:50,991 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:20:50,991 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:20:50,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:20:50,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:20:50,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 10:20:50,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 10:20:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 10:20:50,996 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-30 10:20:50,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:50,996 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 10:20:50,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 10:20:50,996 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 10:20:50,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 10:20:50,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:50,997 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-30 10:20:50,997 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:50,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:50,998 INFO L82 PathProgramCache]: Analyzing trace with hash -599624692, now seen corresponding path program 55 times [2018-09-30 10:20:50,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:50,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:50,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:50,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:50,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:51,005 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:20:51,005 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:20:51,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:20:51,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:51,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:53,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:20:53,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-09-30 10:20:53,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:20:53,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:20:53,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:20:53,050 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-30 10:20:55,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:55,289 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-30 10:20:55,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:20:55,290 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-30 10:20:55,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:55,291 INFO L225 Difference]: With dead ends: 62 [2018-09-30 10:20:55,291 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 10:20:55,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:20:55,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 10:20:55,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 10:20:55,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 10:20:55,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 10:20:55,296 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-30 10:20:55,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:55,296 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 10:20:55,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:20:55,296 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 10:20:55,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 10:20:55,297 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:55,297 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-30 10:20:55,297 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:55,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:55,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1408494461, now seen corresponding path program 56 times [2018-09-30 10:20:55,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:55,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:55,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:55,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:55,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:55,305 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:20:55,306 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:20:55,306 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 10:20:55,319 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:20:55,447 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:20:55,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:55,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:20:57,427 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:20:57,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-09-30 10:20:57,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:20:57,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:20:57,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:20:57,429 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-30 10:20:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:59,767 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 10:20:59,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:20:59,768 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-30 10:20:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:59,768 INFO L225 Difference]: With dead ends: 63 [2018-09-30 10:20:59,769 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 10:20:59,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:20:59,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 10:20:59,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 10:20:59,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 10:20:59,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 10:20:59,774 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-30 10:20:59,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:59,774 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 10:20:59,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:20:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 10:20:59,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 10:20:59,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:59,775 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-30 10:20:59,775 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:59,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:59,776 INFO L82 PathProgramCache]: Analyzing trace with hash -713653524, now seen corresponding path program 57 times [2018-09-30 10:20:59,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:59,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:59,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:59,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:59,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:59,783 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:20:59,783 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:20:59,784 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 10:20:59,801 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:21:07,511 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 10:21:07,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:07,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:21:09,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:21:09,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-09-30 10:21:09,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:21:09,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:21:09,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:21:09,263 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-30 10:21:11,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:11,703 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-30 10:21:11,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 10:21:11,704 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-30 10:21:11,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:11,704 INFO L225 Difference]: With dead ends: 64 [2018-09-30 10:21:11,705 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 10:21:11,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:21:11,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 10:21:11,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 10:21:11,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 10:21:11,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 10:21:11,710 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-30 10:21:11,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:11,711 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 10:21:11,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:21:11,711 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 10:21:11,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 10:21:11,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:11,712 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-30 10:21:11,712 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:11,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:11,712 INFO L82 PathProgramCache]: Analyzing trace with hash -648420957, now seen corresponding path program 58 times [2018-09-30 10:21:11,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:11,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:11,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:11,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:11,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:11,720 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:21:11,720 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:21:11,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:21:11,733 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:21:11,881 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:21:11,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:11,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:21:13,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:21:13,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-09-30 10:21:13,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 10:21:13,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 10:21:13,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 10:21:13,978 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-30 10:21:16,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:16,476 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 10:21:16,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 10:21:16,477 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-30 10:21:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:16,478 INFO L225 Difference]: With dead ends: 65 [2018-09-30 10:21:16,478 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 10:21:16,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 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 10:21:16,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 10:21:16,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 10:21:16,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 10:21:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 10:21:16,483 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-30 10:21:16,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:16,483 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 10:21:16,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 10:21:16,483 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 10:21:16,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 10:21:16,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:16,484 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-30 10:21:16,484 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:16,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:16,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1373788620, now seen corresponding path program 59 times [2018-09-30 10:21:16,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:16,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:16,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:16,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:16,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:16,493 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:21:16,493 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:21:16,493 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 10:21:16,510 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:21:16,708 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 10:21:16,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:16,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:21:19,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:21:19,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-09-30 10:21:19,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 10:21:19,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 10:21:19,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:21:19,782 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-30 10:21:22,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:22,524 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-30 10:21:22,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 10:21:22,524 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-30 10:21:22,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:22,525 INFO L225 Difference]: With dead ends: 66 [2018-09-30 10:21:22,525 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 10:21:22,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:21:22,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 10:21:22,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 10:21:22,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 10:21:22,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 10:21:22,529 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-30 10:21:22,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:22,530 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 10:21:22,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 10:21:22,530 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 10:21:22,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 10:21:22,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:22,530 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-30 10:21:22,530 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:22,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:22,531 INFO L82 PathProgramCache]: Analyzing trace with hash -362223933, now seen corresponding path program 60 times [2018-09-30 10:21:22,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:22,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:22,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:22,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:22,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:22,537 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:21:22,537 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:21:22,537 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 10:21:22,546 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:21:24,434 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 10:21:24,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:24,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:21:26,306 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:21:26,306 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-09-30 10:21:26,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 10:21:26,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 10:21:26,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:21:26,307 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-30 10:21:29,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:29,076 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 10:21:29,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 10:21:29,076 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-30 10:21:29,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:29,077 INFO L225 Difference]: With dead ends: 67 [2018-09-30 10:21:29,077 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 10:21:29,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:21:29,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 10:21:29,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 10:21:29,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 10:21:29,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 10:21:29,082 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-30 10:21:29,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:29,082 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 10:21:29,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 10:21:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 10:21:29,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 10:21:29,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:29,082 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-30 10:21:29,083 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:29,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:29,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1655961772, now seen corresponding path program 61 times [2018-09-30 10:21:29,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:29,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:29,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:29,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:29,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:29,089 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:21:29,089 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:21:29,089 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 10:21:29,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:21:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:29,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:21:31,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:21:31,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-09-30 10:21:31,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 10:21:31,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 10:21:31,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:21:31,177 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-30 10:21:34,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:34,098 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-30 10:21:34,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 10:21:34,098 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-30 10:21:34,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:34,099 INFO L225 Difference]: With dead ends: 68 [2018-09-30 10:21:34,099 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 10:21:34,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 1 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 10:21:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 10:21:34,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 10:21:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 10:21:34,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 10:21:34,105 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-30 10:21:34,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:34,105 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 10:21:34,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 10:21:34,105 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 10:21:34,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 10:21:34,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:34,106 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-30 10:21:34,106 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:34,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:34,106 INFO L82 PathProgramCache]: Analyzing trace with hash -204790813, now seen corresponding path program 62 times [2018-09-30 10:21:34,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:34,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:34,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:34,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:21:34,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:34,113 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:21:34,113 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:21:34,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:21:34,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:21:34,285 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:21:34,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:34,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:21:36,343 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:21:36,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-09-30 10:21:36,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 10:21:36,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 10:21:36,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:21:36,345 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-30 10:21:39,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:39,269 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 10:21:39,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:21:39,270 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-30 10:21:39,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:39,271 INFO L225 Difference]: With dead ends: 69 [2018-09-30 10:21:39,271 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 10:21:39,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:21:39,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 10:21:39,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 10:21:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 10:21:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 10:21:39,276 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-30 10:21:39,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:39,276 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 10:21:39,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 10:21:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 10:21:39,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 10:21:39,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:39,277 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-30 10:21:39,277 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:39,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:39,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2053546100, now seen corresponding path program 63 times [2018-09-30 10:21:39,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:39,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:39,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:39,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:39,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:39,286 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:21:39,286 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:21:39,286 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 10:21:39,300 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:21:52,134 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 10:21:52,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:52,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:21:54,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:21:54,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-09-30 10:21:54,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 10:21:54,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 10:21:54,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:21:54,526 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-30 10:21:57,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:57,589 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-30 10:21:57,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 10:21:57,590 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-30 10:21:57,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:57,591 INFO L225 Difference]: With dead ends: 70 [2018-09-30 10:21:57,591 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 10:21:57,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 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 10:21:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 10:21:57,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 10:21:57,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 10:21:57,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 10:21:57,597 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-30 10:21:57,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:57,598 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 10:21:57,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 10:21:57,598 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 10:21:57,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 10:21:57,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:57,598 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-30 10:21:57,599 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:57,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:57,599 INFO L82 PathProgramCache]: Analyzing trace with hash 764582147, now seen corresponding path program 64 times [2018-09-30 10:21:57,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:57,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:57,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:57,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:57,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:57,608 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:21:57,608 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:21:57,608 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 10:21:57,623 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:21:57,927 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:21:57,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:57,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:22:00,670 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:22:00,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-09-30 10:22:00,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 10:22:00,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 10:22:00,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:22:00,672 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-30 10:22:03,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:03,820 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 10:22:03,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 10:22:03,820 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-30 10:22:03,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:03,821 INFO L225 Difference]: With dead ends: 71 [2018-09-30 10:22:03,821 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 10:22:03,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:22:03,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 10:22:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 10:22:03,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 10:22:03,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 10:22:03,826 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-30 10:22:03,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:03,827 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 10:22:03,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 10:22:03,827 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 10:22:03,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 10:22:03,827 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:03,827 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-30 10:22:03,827 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:03,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:03,828 INFO L82 PathProgramCache]: Analyzing trace with hash -2067755412, now seen corresponding path program 65 times [2018-09-30 10:22:03,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:03,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:03,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:03,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:03,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:03,835 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:22:03,835 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:22:03,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:22:03,843 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:22:04,110 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 10:22:04,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:04,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:22:06,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:22:06,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-09-30 10:22:06,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 10:22:06,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 10:22:06,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:22:06,338 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-30 10:22:09,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:09,580 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-30 10:22:09,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 10:22:09,581 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-30 10:22:09,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:09,582 INFO L225 Difference]: With dead ends: 72 [2018-09-30 10:22:09,582 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 10:22:09,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:22:09,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 10:22:09,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 10:22:09,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 10:22:09,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 10:22:09,588 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-30 10:22:09,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:09,589 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 10:22:09,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 10:22:09,589 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 10:22:09,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 10:22:09,589 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:09,589 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-30 10:22:09,590 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:09,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:09,590 INFO L82 PathProgramCache]: Analyzing trace with hash 324093475, now seen corresponding path program 66 times [2018-09-30 10:22:09,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:09,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:09,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:09,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:09,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:09,598 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:22:09,598 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:22:09,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:22:09,605 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:22:12,983 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 10:22:12,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:12,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:22:17,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:22:17,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-09-30 10:22:17,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 10:22:17,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 10:22:17,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:22:17,539 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-30 10:22:20,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:20,910 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 10:22:20,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 10:22:20,911 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-30 10:22:20,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:20,912 INFO L225 Difference]: With dead ends: 73 [2018-09-30 10:22:20,912 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 10:22:20,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:22:20,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 10:22:20,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 10:22:20,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 10:22:20,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 10:22:20,918 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-30 10:22:20,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:20,918 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 10:22:20,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 10:22:20,918 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 10:22:20,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 10:22:20,918 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:20,918 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-30 10:22:20,919 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:20,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:20,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1456964940, now seen corresponding path program 67 times [2018-09-30 10:22:20,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:20,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:20,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:20,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:20,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:20,926 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:22:20,926 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:22:20,926 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 10:22:20,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:21,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:22:23,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:22:23,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-09-30 10:22:23,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 10:22:23,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 10:22:23,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:22:23,935 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-30 10:22:28,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:28,449 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-30 10:22:28,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 10:22:28,457 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-30 10:22:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:28,458 INFO L225 Difference]: With dead ends: 74 [2018-09-30 10:22:28,458 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 10:22:28,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:22:28,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 10:22:28,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 10:22:28,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 10:22:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 10:22:28,462 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-30 10:22:28,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:28,462 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 10:22:28,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 10:22:28,463 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 10:22:28,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 10:22:28,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:28,463 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-30 10:22:28,463 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:28,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:28,464 INFO L82 PathProgramCache]: Analyzing trace with hash -2078725309, now seen corresponding path program 68 times [2018-09-30 10:22:28,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:28,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:28,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:28,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:28,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:28,472 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:22:28,472 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:22:28,472 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 10:22:28,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:22:28,716 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:22:28,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:28,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:22:31,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:22:31,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-09-30 10:22:31,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 10:22:31,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 10:22:31,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:22:31,303 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-30 10:22:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:34,870 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 10:22:34,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:22:34,871 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-30 10:22:34,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:34,871 INFO L225 Difference]: With dead ends: 75 [2018-09-30 10:22:34,872 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 10:22:34,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 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 10:22:34,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 10:22:34,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 10:22:34,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 10:22:34,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 10:22:34,876 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-30 10:22:34,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:34,876 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 10:22:34,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 10:22:34,876 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 10:22:34,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 10:22:34,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:34,877 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-30 10:22:34,877 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:34,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:34,878 INFO L82 PathProgramCache]: Analyzing trace with hash -15973332, now seen corresponding path program 69 times [2018-09-30 10:22:34,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:34,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:34,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:34,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:34,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:34,885 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:22:34,885 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:22:34,885 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 10:22:34,897 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:22:54,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 10:22:54,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:54,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:22:57,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:22:57,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-09-30 10:22:57,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 10:22:57,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 10:22:57,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:22:57,126 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-30 10:23:00,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:00,974 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-30 10:23:00,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 10:23:00,974 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-30 10:23:00,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:00,975 INFO L225 Difference]: With dead ends: 76 [2018-09-30 10:23:00,975 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 10:23:00,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:23:00,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 10:23:00,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 10:23:00,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 10:23:00,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 10:23:00,982 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-30 10:23:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:00,982 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 10:23:00,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 10:23:00,982 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 10:23:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 10:23:00,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:00,983 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-30 10:23:00,983 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:00,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:00,983 INFO L82 PathProgramCache]: Analyzing trace with hash -495171485, now seen corresponding path program 70 times [2018-09-30 10:23:00,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:00,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:00,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:00,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:00,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:00,992 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:23:00,992 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:23:00,992 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 10:23:01,007 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:23:01,375 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:23:01,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:01,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:03,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:23:03,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-09-30 10:23:03,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 10:23:03,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 10:23:03,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 10:23:03,837 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-30 10:23:07,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:07,520 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 10:23:07,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 10:23:07,520 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-30 10:23:07,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:07,521 INFO L225 Difference]: With dead ends: 77 [2018-09-30 10:23:07,521 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 10:23:07,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 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 10:23:07,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 10:23:07,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 10:23:07,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 10:23:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 10:23:07,527 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-30 10:23:07,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:07,528 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 10:23:07,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 10:23:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 10:23:07,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 10:23:07,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:07,529 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-30 10:23:07,529 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:07,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:07,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1829554956, now seen corresponding path program 71 times [2018-09-30 10:23:07,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:07,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:07,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:07,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:07,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:07,537 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:23:07,537 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:23:07,537 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 10:23:07,554 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:23:08,041 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 10:23:08,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:08,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:23:10,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-09-30 10:23:10,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-09-30 10:23:10,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 10:23:10,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 10:23:10,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:23:10,870 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-30 10:23:14,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:23:14,600 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-30 10:23:14,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 10:23:14,601 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-30 10:23:14,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:23:14,602 INFO L225 Difference]: With dead ends: 78 [2018-09-30 10:23:14,602 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 10:23:14,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:23:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 10:23:14,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 10:23:14,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 10:23:14,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 10:23:14,609 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-30 10:23:14,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:23:14,609 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 10:23:14,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 10:23:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 10:23:14,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 10:23:14,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:23:14,610 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-30 10:23:14,610 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:23:14,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:23:14,610 INFO L82 PathProgramCache]: Analyzing trace with hash 881630595, now seen corresponding path program 72 times [2018-09-30 10:23:14,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:23:14,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:23:14,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:14,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:23:14,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:23:14,618 ERROR L236 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-09-30 10:23:14,619 INFO L259 seRefinementStrategy]: Advancing trace checker [2018-09-30 10:23:14,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 10:23:14,633 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... [2018-09-30 10:23:19,030 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 10:23:19,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:23:19,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:23:19,038 WARN L186 SmtUtils]: Removed 1 from assertion stack [2018-09-30 10:23:19,038 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-30 10:23:19,239 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-09-30 10:23:19,239 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:23:19,245 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:23:19,245 INFO L202 PluginConnector]: Adding new model gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:23:19 BoogieIcfgContainer [2018-09-30 10:23:19,245 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:23:19,246 INFO L168 Benchmark]: Toolchain (without parser) took 256128.37 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 58.7 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 218.3 MB). Peak memory consumption was 277.0 MB. Max. memory is 7.1 GB. [2018-09-30 10:23:19,247 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:23:19,247 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:23:19,248 INFO L168 Benchmark]: Boogie Preprocessor took 21.44 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:23:19,248 INFO L168 Benchmark]: RCFGBuilder took 290.92 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:23:19,249 INFO L168 Benchmark]: TraceAbstraction took 255765.43 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 58.7 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 197.1 MB). Peak memory consumption was 255.8 MB. Max. memory is 7.1 GB. [2018-09-30 10:23:19,251 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.44 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 290.92 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 255765.43 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 58.7 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 197.1 MB). Peak memory consumption was 255.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 46). Cancelled while BasicCegarLoop was analyzing trace of length 76 with TraceHistMax 72, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 7. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 255.6s OverallTime, 73 OverallIterations, 72 TraceHistogramMax, 100.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 216 SDtfs, 0 SDslu, 2628 SDs, 0 SdLazy, 132276 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 84.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2700 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2628 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=72, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 72 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 62.6s SatisfiabilityAnalysisTime, 83.6s InterpolantComputationTime, 2772 NumberOfCodeBlocks, 2772 NumberOfCodeBlocksAsserted, 750 NumberOfCheckSat, 2700 ConstructedInterpolants, 0 QuantifiedInterpolants, 919171 SizeOfPredicates, 215 NumberOfNonLiveVariables, 14148 ConjunctsInSsa, 10653 ConjunctsInUnsatCore, 72 InterpolantComputations, 1 PerfectInterpolantSequences, 0/62196 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-23-19-265.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-23-19-265.csv Completed graceful shutdown