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-c372c2b [2018-10-02 11:39:25,091 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:39:25,093 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:39:25,105 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 11:39:25,105 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 11:39:25,106 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 11:39:25,108 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 11:39:25,110 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 11:39:25,112 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 11:39:25,114 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 11:39:25,115 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-02 11:39:25,115 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-02 11:39:25,117 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-02 11:39:25,120 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-02 11:39:25,121 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-02 11:39:25,123 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-02 11:39:25,124 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-02 11:39:25,131 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-02 11:39:25,136 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-02 11:39:25,137 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-02 11:39:25,140 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-02 11:39:25,142 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-02 11:39:25,146 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-02 11:39:25,157 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-02 11:39:25,183 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:39:25,184 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:39:25,184 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:39:25,185 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:39:25,185 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:39:25,189 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:39:25,189 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:39:25,190 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:39:25,190 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:39:25,190 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:39:25,190 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:39:25,190 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:39:25,191 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:39:25,191 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:39:25,191 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:39:25,191 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:39:25,191 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:39:25,192 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:39:25,192 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:39:25,192 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:39:25,192 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:39:25,192 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:39:25,192 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:39:25,193 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:39:25,193 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:39:25,193 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:39:25,193 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:39:25,193 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:39:25,194 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:39:25,194 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:39:25,237 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:39:25,249 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:39:25,253 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:39:25,255 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:39:25,255 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:39:25,256 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-10-02 11:39:25,256 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl' [2018-10-02 11:39:25,312 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:39:25,316 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:39:25,317 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:39:25,317 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:39:25,317 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:39:25,339 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 02.10 11:39:25" (1/1) ... [2018-10-02 11:39:25,351 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 02.10 11:39:25" (1/1) ... [2018-10-02 11:39:25,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:39:25,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:39:25,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:39:25,358 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:39:25,368 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 02.10 11:39:25" (1/1) ... [2018-10-02 11:39:25,369 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 02.10 11:39:25" (1/1) ... [2018-10-02 11:39:25,369 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 02.10 11:39:25" (1/1) ... [2018-10-02 11:39:25,370 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 02.10 11:39:25" (1/1) ... [2018-10-02 11:39:25,372 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 02.10 11:39:25" (1/1) ... [2018-10-02 11:39:25,374 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 02.10 11:39:25" (1/1) ... [2018-10-02 11:39:25,375 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 02.10 11:39:25" (1/1) ... [2018-10-02 11:39:25,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:39:25,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:39:25,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:39:25,377 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:39:25,379 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 02.10 11:39:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:39:25,449 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-02 11:39:25,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 11:39:25,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 11:39:25,652 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 11:39:25,653 INFO L202 PluginConnector]: Adding new model gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:39:25 BoogieIcfgContainer [2018-10-02 11:39:25,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:39:25,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:39:25,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:39:25,657 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:39:25,657 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 02.10 11:39:25" (1/2) ... [2018-10-02 11:39:25,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db66182 and model type gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:39:25, skipping insertion in model container [2018-10-02 11:39:25,659 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 02.10 11:39:25" (2/2) ... [2018-10-02 11:39:25,661 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-10-02 11:39:25,671 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:39:25,680 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:39:25,729 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:39:25,729 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:39:25,730 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:39:25,730 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:39:25,730 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:39:25,730 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:39:25,731 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:39:25,731 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:39:25,731 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:39:25,747 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-02 11:39:25,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-02 11:39:25,754 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:25,755 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-02 11:39:25,756 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:25,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:25,763 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-10-02 11:39:25,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:25,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:25,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:25,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:25,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:25,843 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:25,843 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:25,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:25,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:25,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:26,018 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:39:26,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 11:39:26,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:39:26,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:39:26,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:39:26,044 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-02 11:39:26,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:26,075 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-10-02 11:39:26,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:39:26,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-02 11:39:26,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:26,088 INFO L225 Difference]: With dead ends: 9 [2018-10-02 11:39:26,088 INFO L226 Difference]: Without dead ends: 5 [2018-10-02 11:39:26,092 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 [2018-10-02 11:39:26,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-02 11:39:26,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-02 11:39:26,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-02 11:39:26,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-02 11:39:26,127 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-02 11:39:26,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:26,128 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-02 11:39:26,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:39:26,128 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-02 11:39:26,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-02 11:39:26,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:26,129 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-02 11:39:26,130 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:26,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:26,130 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-10-02 11:39:26,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:26,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:26,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:26,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:26,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:26,145 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:26,145 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:26,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:26,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:26,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:26,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:26,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-10-02 11:39:26,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:39:26,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:39:26,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:39:26,319 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-10-02 11:39:26,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:26,390 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-02 11:39:26,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:39:26,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-10-02 11:39:26,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:26,391 INFO L225 Difference]: With dead ends: 8 [2018-10-02 11:39:26,392 INFO L226 Difference]: Without dead ends: 6 [2018-10-02 11:39:26,393 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 [2018-10-02 11:39:26,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-02 11:39:26,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-02 11:39:26,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-02 11:39:26,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-02 11:39:26,396 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-02 11:39:26,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:26,396 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-02 11:39:26,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:39:26,396 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-02 11:39:26,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-02 11:39:26,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:26,397 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-02 11:39:26,397 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:26,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:26,398 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2018-10-02 11:39:26,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:26,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:26,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:26,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:26,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:26,411 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:26,411 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:26,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:26,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:39:26,445 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:39:26,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:26,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:26,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:26,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-10-02 11:39:26,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:39:26,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:39:26,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:39:26,573 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-02 11:39:26,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:26,698 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-02 11:39:26,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:39:26,699 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-02 11:39:26,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:26,700 INFO L225 Difference]: With dead ends: 9 [2018-10-02 11:39:26,700 INFO L226 Difference]: Without dead ends: 7 [2018-10-02 11:39:26,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:39:26,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-02 11:39:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-02 11:39:26,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-02 11:39:26,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-02 11:39:26,704 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-02 11:39:26,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:26,704 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-02 11:39:26,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:39:26,705 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-02 11:39:26,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 11:39:26,705 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:26,705 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-10-02 11:39:26,706 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:26,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:26,706 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2018-10-02 11:39:26,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:26,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:26,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:26,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:26,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:26,716 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:26,716 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:26,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:26,729 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:39:26,741 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-02 11:39:26,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:26,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:26,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:26,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:26,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-02 11:39:26,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:39:26,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:39:26,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:39:26,945 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-02 11:39:27,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:27,133 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-02 11:39:27,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:39:27,134 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-02 11:39:27,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:27,134 INFO L225 Difference]: With dead ends: 10 [2018-10-02 11:39:27,134 INFO L226 Difference]: Without dead ends: 8 [2018-10-02 11:39:27,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:39:27,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-02 11:39:27,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-02 11:39:27,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-02 11:39:27,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-02 11:39:27,143 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-02 11:39:27,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:27,144 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-02 11:39:27,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:39:27,144 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-02 11:39:27,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-02 11:39:27,145 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:27,145 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-10-02 11:39:27,145 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:27,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:27,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2018-10-02 11:39:27,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:27,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:27,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:27,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:27,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:27,156 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:27,157 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:27,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:27,166 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:39:27,180 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:39:27,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:27,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:27,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:27,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-10-02 11:39:27,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:39:27,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:39:27,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:39:27,403 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-02 11:39:27,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:27,467 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 11:39:27,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:39:27,469 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-02 11:39:27,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:27,470 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:39:27,470 INFO L226 Difference]: Without dead ends: 9 [2018-10-02 11:39:27,471 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 [2018-10-02 11:39:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-02 11:39:27,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-02 11:39:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 11:39:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-02 11:39:27,475 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-02 11:39:27,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:27,475 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-02 11:39:27,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:39:27,476 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-02 11:39:27,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 11:39:27,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:27,476 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-10-02 11:39:27,477 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:27,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:27,477 INFO L82 PathProgramCache]: Analyzing trace with hash 317188140, now seen corresponding path program 5 times [2018-10-02 11:39:27,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:27,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:27,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:27,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:27,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:27,488 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:27,488 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:27,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:27,498 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:39:27,513 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-02 11:39:27,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:27,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:27,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:27,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-02 11:39:27,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:39:27,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:39:27,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:39:27,685 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-02 11:39:27,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:27,992 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-02 11:39:27,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:39:27,993 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-02 11:39:27,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:27,994 INFO L225 Difference]: With dead ends: 12 [2018-10-02 11:39:27,994 INFO L226 Difference]: Without dead ends: 10 [2018-10-02 11:39:27,995 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 [2018-10-02 11:39:27,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-02 11:39:27,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-02 11:39:27,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-02 11:39:27,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-02 11:39:27,998 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-02 11:39:27,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:27,998 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-02 11:39:27,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:39:27,999 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-02 11:39:27,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 11:39:27,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:28,000 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-10-02 11:39:28,000 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:28,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:28,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1242899555, now seen corresponding path program 6 times [2018-10-02 11:39:28,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:28,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:28,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:28,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:28,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:28,011 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:28,011 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:28,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:28,031 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:39:28,048 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-02 11:39:28,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:28,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:28,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:28,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-10-02 11:39:28,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:39:28,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:39:28,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:39:28,426 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-02 11:39:28,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:28,515 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-02 11:39:28,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:39:28,517 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-02 11:39:28,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:28,518 INFO L225 Difference]: With dead ends: 13 [2018-10-02 11:39:28,518 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 11:39:28,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:39:28,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 11:39:28,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 11:39:28,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 11:39:28,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-02 11:39:28,522 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-02 11:39:28,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:28,522 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-02 11:39:28,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:39:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-02 11:39:28,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 11:39:28,523 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:28,523 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-10-02 11:39:28,524 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:28,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:28,524 INFO L82 PathProgramCache]: Analyzing trace with hash -124817652, now seen corresponding path program 7 times [2018-10-02 11:39:28,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:28,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:28,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:28,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:28,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:28,535 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:28,535 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:28,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:28,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:28,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:28,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:28,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-02 11:39:28,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:39:28,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:39:28,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:39:28,764 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-02 11:39:28,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:28,876 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-02 11:39:28,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:39:28,877 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-02 11:39:28,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:28,878 INFO L225 Difference]: With dead ends: 14 [2018-10-02 11:39:28,878 INFO L226 Difference]: Without dead ends: 12 [2018-10-02 11:39:28,879 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 [2018-10-02 11:39:28,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-02 11:39:28,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-02 11:39:28,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-02 11:39:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-02 11:39:28,883 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-02 11:39:28,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:28,883 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-02 11:39:28,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:39:28,884 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-02 11:39:28,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:39:28,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:28,884 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-10-02 11:39:28,884 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:28,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:28,885 INFO L82 PathProgramCache]: Analyzing trace with hash 425621891, now seen corresponding path program 8 times [2018-10-02 11:39:28,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:28,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:28,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:28,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:28,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:28,896 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:28,897 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:28,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:28,906 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:39:28,921 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:39:28,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:28,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:29,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:29,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-10-02 11:39:29,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:39:29,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:39:29,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:39:29,153 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-02 11:39:29,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:29,316 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-02 11:39:29,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:39:29,319 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-02 11:39:29,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:29,320 INFO L225 Difference]: With dead ends: 15 [2018-10-02 11:39:29,321 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 11:39:29,321 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 [2018-10-02 11:39:29,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 11:39:29,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-02 11:39:29,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 11:39:29,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-02 11:39:29,325 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-02 11:39:29,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:29,326 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-02 11:39:29,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:39:29,326 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-02 11:39:29,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 11:39:29,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:29,327 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-10-02 11:39:29,327 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:29,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:29,327 INFO L82 PathProgramCache]: Analyzing trace with hash 309378540, now seen corresponding path program 9 times [2018-10-02 11:39:29,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:29,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:29,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:29,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:29,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:29,338 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:29,339 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:29,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:29,348 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:39:29,368 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-02 11:39:29,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:29,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:29,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:29,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-02 11:39:29,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:39:29,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:39:29,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:39:29,567 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-02 11:39:29,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:29,710 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-02 11:39:29,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:39:29,711 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-02 11:39:29,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:29,711 INFO L225 Difference]: With dead ends: 16 [2018-10-02 11:39:29,712 INFO L226 Difference]: Without dead ends: 14 [2018-10-02 11:39:29,712 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 [2018-10-02 11:39:29,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-02 11:39:29,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-02 11:39:29,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 11:39:29,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-02 11:39:29,715 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-02 11:39:29,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:29,716 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-02 11:39:29,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:39:29,716 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-02 11:39:29,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:39:29,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:29,717 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-10-02 11:39:29,717 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:29,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:29,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1000801955, now seen corresponding path program 10 times [2018-10-02 11:39:29,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:29,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:29,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:29,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:29,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:29,726 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:29,727 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:29,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:29,735 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:39:29,753 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:39:29,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:29,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:29,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:29,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-10-02 11:39:29,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 11:39:29,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 11:39:29,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:39:29,966 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-02 11:39:30,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:30,093 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-02 11:39:30,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:39:30,099 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-02 11:39:30,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:30,100 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:39:30,100 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 11:39:30,100 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 [2018-10-02 11:39:30,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 11:39:30,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-02 11:39:30,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 11:39:30,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-02 11:39:30,104 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-02 11:39:30,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:30,105 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-02 11:39:30,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 11:39:30,105 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-02 11:39:30,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 11:39:30,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:30,106 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-10-02 11:39:30,106 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:30,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:30,106 INFO L82 PathProgramCache]: Analyzing trace with hash 960091340, now seen corresponding path program 11 times [2018-10-02 11:39:30,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:30,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:30,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:30,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:30,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:30,118 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:30,118 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:30,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:30,135 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:39:30,155 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:39:30,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:30,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:30,658 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:30,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:30,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-02 11:39:30,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:39:30,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:39:30,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:39:30,686 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-02 11:39:30,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:30,859 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-02 11:39:30,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:39:30,859 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-02 11:39:30,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:30,860 INFO L225 Difference]: With dead ends: 18 [2018-10-02 11:39:30,860 INFO L226 Difference]: Without dead ends: 16 [2018-10-02 11:39:30,861 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 [2018-10-02 11:39:30,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-02 11:39:30,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-02 11:39:30,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 11:39:30,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-02 11:39:30,866 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-02 11:39:30,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:30,866 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-02 11:39:30,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:39:30,866 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-02 11:39:30,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:39:30,867 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:30,867 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-10-02 11:39:30,867 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:30,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:30,868 INFO L82 PathProgramCache]: Analyzing trace with hash -301937725, now seen corresponding path program 12 times [2018-10-02 11:39:30,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:30,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:30,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:30,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:30,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:30,878 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:30,878 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:30,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:30,890 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:39:30,909 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:39:30,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:30,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:31,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:31,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-10-02 11:39:31,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 11:39:31,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 11:39:31,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:39:31,181 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-02 11:39:31,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:31,407 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-02 11:39:31,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:39:31,410 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-02 11:39:31,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:31,410 INFO L225 Difference]: With dead ends: 19 [2018-10-02 11:39:31,410 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 11:39:31,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:39:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 11:39:31,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-02 11:39:31,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 11:39:31,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-02 11:39:31,418 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-02 11:39:31,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:31,418 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-02 11:39:31,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 11:39:31,418 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-02 11:39:31,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 11:39:31,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:31,419 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-10-02 11:39:31,419 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:31,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:31,420 INFO L82 PathProgramCache]: Analyzing trace with hash -770133076, now seen corresponding path program 13 times [2018-10-02 11:39:31,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:31,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:31,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:31,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:31,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:31,443 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:31,444 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:31,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:31,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:31,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:31,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:31,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-02 11:39:31,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:39:31,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:39:31,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:39:31,900 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-02 11:39:32,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:32,118 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-02 11:39:32,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:39:32,119 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-02 11:39:32,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:32,119 INFO L225 Difference]: With dead ends: 20 [2018-10-02 11:39:32,120 INFO L226 Difference]: Without dead ends: 18 [2018-10-02 11:39:32,120 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 [2018-10-02 11:39:32,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-02 11:39:32,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-02 11:39:32,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:39:32,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-02 11:39:32,124 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-02 11:39:32,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:32,125 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-02 11:39:32,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:39:32,125 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-02 11:39:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:39:32,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:32,126 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-10-02 11:39:32,126 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:32,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:32,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1895680227, now seen corresponding path program 14 times [2018-10-02 11:39:32,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:32,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:32,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:32,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:32,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:32,136 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:32,136 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:32,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:32,151 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:39:32,173 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:39:32,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:32,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:32,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:32,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-02 11:39:32,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:39:32,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:39:32,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:39:32,825 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-02 11:39:33,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:33,071 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-02 11:39:33,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:39:33,073 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-02 11:39:33,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:33,073 INFO L225 Difference]: With dead ends: 21 [2018-10-02 11:39:33,073 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 11:39:33,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:39:33,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 11:39:33,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-02 11:39:33,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 11:39:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-02 11:39:33,078 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-02 11:39:33,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:33,078 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-02 11:39:33,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:39:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-02 11:39:33,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 11:39:33,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:33,079 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-10-02 11:39:33,079 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:33,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:33,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1363453300, now seen corresponding path program 15 times [2018-10-02 11:39:33,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:33,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:33,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:33,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:33,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:33,089 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:33,089 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:33,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:33,099 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:39:33,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:39:33,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:33,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:33,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:33,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-02 11:39:33,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:39:33,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:39:33,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:39:33,514 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-02 11:39:33,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:33,762 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-02 11:39:33,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:39:33,772 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-02 11:39:33,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:33,773 INFO L225 Difference]: With dead ends: 22 [2018-10-02 11:39:33,773 INFO L226 Difference]: Without dead ends: 20 [2018-10-02 11:39:33,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:39:33,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-02 11:39:33,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-02 11:39:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:39:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-02 11:39:33,785 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-02 11:39:33,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:33,785 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-02 11:39:33,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:39:33,785 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-02 11:39:33,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:39:33,786 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:33,786 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-10-02 11:39:33,786 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:33,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:33,787 INFO L82 PathProgramCache]: Analyzing trace with hash 682622467, now seen corresponding path program 16 times [2018-10-02 11:39:33,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:33,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:33,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:33,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:33,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:33,812 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:33,812 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:33,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:33,827 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:39:33,856 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:39:33,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:33,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:35,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:35,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-10-02 11:39:35,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 11:39:35,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 11:39:35,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:39:35,437 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-02 11:39:35,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:35,855 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-02 11:39:35,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:39:35,857 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-02 11:39:35,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:35,858 INFO L225 Difference]: With dead ends: 23 [2018-10-02 11:39:35,858 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 11:39:35,858 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 [2018-10-02 11:39:35,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 11:39:35,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-02 11:39:35,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-02 11:39:35,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-02 11:39:35,862 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-02 11:39:35,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:35,862 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-02 11:39:35,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 11:39:35,863 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-02 11:39:35,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 11:39:35,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:35,863 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-10-02 11:39:35,863 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:35,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:35,864 INFO L82 PathProgramCache]: Analyzing trace with hash -313538196, now seen corresponding path program 17 times [2018-10-02 11:39:35,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:35,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:35,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:35,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:35,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:35,873 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:35,873 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:35,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:35,886 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:39:35,916 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-02 11:39:35,916 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:35,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:36,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:36,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-02 11:39:36,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:39:36,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:39:36,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:39:36,246 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-02 11:39:36,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:36,634 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-02 11:39:36,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:39:36,635 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-02 11:39:36,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:36,636 INFO L225 Difference]: With dead ends: 24 [2018-10-02 11:39:36,636 INFO L226 Difference]: Without dead ends: 22 [2018-10-02 11:39:36,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:39:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-02 11:39:36,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-02 11:39:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:39:36,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-02 11:39:36,641 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-02 11:39:36,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:36,641 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-02 11:39:36,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:39:36,642 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-02 11:39:36,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-02 11:39:36,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:36,642 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-10-02 11:39:36,643 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:36,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:36,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1129747677, now seen corresponding path program 18 times [2018-10-02 11:39:36,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:36,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:36,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:36,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:36,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:36,651 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:36,652 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:36,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:36,667 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:39:36,705 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-02 11:39:36,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:36,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:37,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:37,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-02 11:39:37,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 11:39:37,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 11:39:37,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:39:37,064 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-02 11:39:37,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:37,372 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-02 11:39:37,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:39:37,373 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-02 11:39:37,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:37,374 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:39:37,374 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:39:37,375 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 [2018-10-02 11:39:37,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:39:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-02 11:39:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 11:39:37,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-02 11:39:37,380 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-02 11:39:37,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:37,380 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-02 11:39:37,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 11:39:37,380 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-02 11:39:37,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 11:39:37,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:37,381 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-10-02 11:39:37,381 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:37,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:37,382 INFO L82 PathProgramCache]: Analyzing trace with hash -662437812, now seen corresponding path program 19 times [2018-10-02 11:39:37,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:37,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:37,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:37,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:37,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:37,390 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:37,391 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:37,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:37,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:37,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:37,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:37,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-02 11:39:37,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:39:37,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:39:37,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:39:37,849 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-02 11:39:38,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:38,282 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-02 11:39:38,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:39:38,283 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-02 11:39:38,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:38,283 INFO L225 Difference]: With dead ends: 26 [2018-10-02 11:39:38,283 INFO L226 Difference]: Without dead ends: 24 [2018-10-02 11:39:38,284 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 [2018-10-02 11:39:38,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-02 11:39:38,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-02 11:39:38,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:39:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-02 11:39:38,288 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-02 11:39:38,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:38,288 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-02 11:39:38,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:39:38,289 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-02 11:39:38,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-02 11:39:38,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:38,289 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-10-02 11:39:38,290 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:38,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:38,290 INFO L82 PathProgramCache]: Analyzing trace with hash 939266115, now seen corresponding path program 20 times [2018-10-02 11:39:38,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:38,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:38,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:38,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:38,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:38,299 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:38,299 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:38,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:38,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:39:38,342 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:39:38,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:38,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:38,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:38,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-02 11:39:38,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 11:39:38,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 11:39:38,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:39:38,783 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-02 11:39:39,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:39,238 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-02 11:39:39,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:39:39,238 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-02 11:39:39,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:39,239 INFO L225 Difference]: With dead ends: 27 [2018-10-02 11:39:39,239 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 11:39:39,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:39:39,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 11:39:39,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-02 11:39:39,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 11:39:39,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-02 11:39:39,244 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-02 11:39:39,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:39,244 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-02 11:39:39,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 11:39:39,245 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-02 11:39:39,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 11:39:39,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:39,245 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-10-02 11:39:39,246 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:39,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:39,246 INFO L82 PathProgramCache]: Analyzing trace with hash -947519700, now seen corresponding path program 21 times [2018-10-02 11:39:39,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:39,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:39,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:39,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:39,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:39,254 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:39,254 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:39,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:39,268 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:39:39,390 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-02 11:39:39,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:39,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:39,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:39,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-02 11:39:39,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:39:39,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:39:39,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:39:39,769 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-02 11:39:40,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:40,209 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-02 11:39:40,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 11:39:40,212 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-02 11:39:40,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:40,213 INFO L225 Difference]: With dead ends: 28 [2018-10-02 11:39:40,213 INFO L226 Difference]: Without dead ends: 26 [2018-10-02 11:39:40,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:39:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-02 11:39:40,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-02 11:39:40,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:39:40,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-02 11:39:40,217 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-02 11:39:40,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:40,218 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-02 11:39:40,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:39:40,218 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-02 11:39:40,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-02 11:39:40,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:40,219 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-10-02 11:39:40,219 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:40,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:40,219 INFO L82 PathProgramCache]: Analyzing trace with hash 691662179, now seen corresponding path program 22 times [2018-10-02 11:39:40,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:40,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:40,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:40,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:40,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:40,228 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:40,228 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:40,228 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:40,260 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:39:40,302 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:39:40,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:40,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:40,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:40,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-02 11:39:40,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 11:39:40,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 11:39:40,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:39:40,866 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-02 11:39:41,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:41,650 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-02 11:39:41,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:39:41,650 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-02 11:39:41,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:41,651 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:39:41,651 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:39:41,652 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 [2018-10-02 11:39:41,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:39:41,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-02 11:39:41,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 11:39:41,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-02 11:39:41,656 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-02 11:39:41,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:41,657 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-02 11:39:41,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 11:39:41,657 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-02 11:39:41,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 11:39:41,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:41,658 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-10-02 11:39:41,658 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:41,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:41,658 INFO L82 PathProgramCache]: Analyzing trace with hash -33307124, now seen corresponding path program 23 times [2018-10-02 11:39:41,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:41,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:41,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:41,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:41,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:41,666 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:41,667 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:41,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:41,689 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:39:41,732 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-02 11:39:41,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:41,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:42,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:42,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-02 11:39:42,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:39:42,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:39:42,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:39:42,356 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-02 11:39:42,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:42,945 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-02 11:39:42,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:39:42,946 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-02 11:39:42,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:42,946 INFO L225 Difference]: With dead ends: 30 [2018-10-02 11:39:42,947 INFO L226 Difference]: Without dead ends: 28 [2018-10-02 11:39:42,948 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 [2018-10-02 11:39:42,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-02 11:39:42,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-02 11:39:42,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:39:42,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-02 11:39:42,953 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-02 11:39:42,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:42,953 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-02 11:39:42,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:39:42,954 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-02 11:39:42,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-02 11:39:42,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:42,954 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-10-02 11:39:42,955 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:42,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:42,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1032519037, now seen corresponding path program 24 times [2018-10-02 11:39:42,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:42,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:42,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:42,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:42,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:42,963 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:42,963 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:42,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:42,983 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:39:43,043 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 11:39:43,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:43,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:43,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:43,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-02 11:39:43,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 11:39:43,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 11:39:43,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:39:43,809 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-02 11:39:44,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:44,313 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-02 11:39:44,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:39:44,314 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-02 11:39:44,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:44,315 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:39:44,315 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:39:44,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:39:44,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:39:44,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-02 11:39:44,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 11:39:44,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-02 11:39:44,321 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-02 11:39:44,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:44,322 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-02 11:39:44,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 11:39:44,322 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-02 11:39:44,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 11:39:44,323 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:44,323 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-10-02 11:39:44,323 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:44,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:44,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1943317268, now seen corresponding path program 25 times [2018-10-02 11:39:44,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:44,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:44,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:44,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:44,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:44,332 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:44,333 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:44,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:44,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:44,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:44,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:44,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-02 11:39:44,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:39:44,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:39:44,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:39:44,922 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-02 11:39:45,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:45,439 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-02 11:39:45,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:39:45,439 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-02 11:39:45,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:45,440 INFO L225 Difference]: With dead ends: 32 [2018-10-02 11:39:45,440 INFO L226 Difference]: Without dead ends: 30 [2018-10-02 11:39:45,441 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 [2018-10-02 11:39:45,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-02 11:39:45,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-02 11:39:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:39:45,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-02 11:39:45,446 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-02 11:39:45,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:45,446 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-02 11:39:45,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:39:45,447 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-02 11:39:45,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-02 11:39:45,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:45,447 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-10-02 11:39:45,448 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:45,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:45,448 INFO L82 PathProgramCache]: Analyzing trace with hash -113291357, now seen corresponding path program 26 times [2018-10-02 11:39:45,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:45,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:45,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:45,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:45,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:45,456 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:45,456 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:45,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:45,473 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:39:45,523 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:39:45,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:45,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:46,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:46,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-02 11:39:46,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:39:46,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:39:46,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:39:46,109 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-02 11:39:46,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:46,722 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-02 11:39:46,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:39:46,722 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-02 11:39:46,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:46,723 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:39:46,723 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:39:46,724 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 [2018-10-02 11:39:46,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:39:46,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-02 11:39:46,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 11:39:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-02 11:39:46,728 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-02 11:39:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:46,728 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-02 11:39:46,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:39:46,729 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-02 11:39:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 11:39:46,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:46,729 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-10-02 11:39:46,729 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:46,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:46,729 INFO L82 PathProgramCache]: Analyzing trace with hash 782937036, now seen corresponding path program 27 times [2018-10-02 11:39:46,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:46,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:46,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:46,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:46,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:46,736 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:46,737 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:46,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:46,750 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:39:47,045 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-02 11:39:47,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:47,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:47,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:47,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-02 11:39:47,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:39:47,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:39:47,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:39:47,606 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-02 11:39:48,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:48,179 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-02 11:39:48,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 11:39:48,179 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-02 11:39:48,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:48,180 INFO L225 Difference]: With dead ends: 34 [2018-10-02 11:39:48,180 INFO L226 Difference]: Without dead ends: 32 [2018-10-02 11:39:48,181 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 [2018-10-02 11:39:48,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-02 11:39:48,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-02 11:39:48,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:39:48,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-02 11:39:48,186 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-02 11:39:48,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:48,186 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-02 11:39:48,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:39:48,186 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-02 11:39:48,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-02 11:39:48,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:48,187 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-10-02 11:39:48,187 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:48,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:48,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1498753853, now seen corresponding path program 28 times [2018-10-02 11:39:48,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:48,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:48,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:48,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:48,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:48,198 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:48,198 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:48,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:48,212 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:39:48,257 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:39:48,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:48,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:49,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:49,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-02 11:39:49,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 11:39:49,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 11:39:49,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:39:49,111 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-02 11:39:49,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:49,742 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-02 11:39:49,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:39:49,742 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-02 11:39:49,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:49,743 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:39:49,743 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:39:49,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:39:49,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:39:49,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-02 11:39:49,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-02 11:39:49,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-02 11:39:49,749 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-02 11:39:49,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:49,750 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-02 11:39:49,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 11:39:49,750 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-02 11:39:49,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 11:39:49,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:49,751 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-10-02 11:39:49,751 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:49,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:49,751 INFO L82 PathProgramCache]: Analyzing trace with hash 783272620, now seen corresponding path program 29 times [2018-10-02 11:39:49,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:49,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:49,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:49,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:49,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:49,759 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:49,759 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:49,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:49,773 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:39:49,835 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-02 11:39:49,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:49,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:50,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:50,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-02 11:39:50,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:39:50,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:39:50,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:39:50,496 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-02 11:39:51,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:51,186 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-02 11:39:51,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:39:51,187 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-02 11:39:51,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:51,188 INFO L225 Difference]: With dead ends: 36 [2018-10-02 11:39:51,188 INFO L226 Difference]: Without dead ends: 34 [2018-10-02 11:39:51,189 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 [2018-10-02 11:39:51,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-02 11:39:51,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-02 11:39:51,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:39:51,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-02 11:39:51,192 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-02 11:39:51,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:51,193 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-02 11:39:51,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:39:51,193 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-02 11:39:51,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-02 11:39:51,193 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:51,193 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-10-02 11:39:51,194 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:51,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:51,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1488350749, now seen corresponding path program 30 times [2018-10-02 11:39:51,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:51,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:51,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:51,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:51,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:51,201 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:51,201 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:51,201 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) [2018-10-02 11:39:51,223 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:51,366 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-02 11:39:51,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:51,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:52,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:52,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-02 11:39:52,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 11:39:52,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 11:39:52,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:39:52,099 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-02 11:39:52,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:52,806 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-02 11:39:52,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:39:52,806 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-02 11:39:52,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:52,807 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:39:52,807 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:39:52,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:39:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:39:52,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-02 11:39:52,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 11:39:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-02 11:39:52,813 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-02 11:39:52,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:52,813 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-02 11:39:52,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 11:39:52,813 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-02 11:39:52,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 11:39:52,814 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:52,814 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-10-02 11:39:52,814 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:52,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:52,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1105768844, now seen corresponding path program 31 times [2018-10-02 11:39:52,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:52,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:52,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:52,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:52,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:52,822 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:52,822 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:52,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:52,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:52,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:53,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:53,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-02 11:39:53,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:39:53,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:39:53,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:39:53,815 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-02 11:39:54,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:54,604 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-02 11:39:54,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:39:54,604 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-02 11:39:54,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:54,605 INFO L225 Difference]: With dead ends: 38 [2018-10-02 11:39:54,605 INFO L226 Difference]: Without dead ends: 36 [2018-10-02 11:39:54,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:39:54,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-02 11:39:54,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-02 11:39:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-02 11:39:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-02 11:39:54,611 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-02 11:39:54,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:54,611 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-02 11:39:54,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:39:54,612 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-02 11:39:54,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-02 11:39:54,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:54,612 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-10-02 11:39:54,613 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:54,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:54,613 INFO L82 PathProgramCache]: Analyzing trace with hash -80902397, now seen corresponding path program 32 times [2018-10-02 11:39:54,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:54,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:54,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:54,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:54,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:54,620 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:54,620 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:54,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:54,629 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:39:54,686 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:39:54,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:54,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:55,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:55,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-02 11:39:55,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 11:39:55,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 11:39:55,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:39:55,368 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-02 11:39:56,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:56,229 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-02 11:39:56,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:39:56,230 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-02 11:39:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:56,231 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:39:56,231 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:39:56,232 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 [2018-10-02 11:39:56,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:39:56,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-02 11:39:56,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-02 11:39:56,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-02 11:39:56,236 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-02 11:39:56,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:56,236 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-02 11:39:56,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 11:39:56,237 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-02 11:39:56,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-02 11:39:56,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:56,237 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-10-02 11:39:56,237 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:56,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:56,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1786994796, now seen corresponding path program 33 times [2018-10-02 11:39:56,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:56,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:56,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:56,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:56,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:56,244 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:56,244 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:56,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:56,257 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:39:56,910 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-02 11:39:56,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:56,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:57,793 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:57,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:57,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-02 11:39:57,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:39:57,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:39:57,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:39:57,814 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-02 11:39:58,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:58,698 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-02 11:39:58,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:39:58,698 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-02 11:39:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:58,699 INFO L225 Difference]: With dead ends: 40 [2018-10-02 11:39:58,699 INFO L226 Difference]: Without dead ends: 38 [2018-10-02 11:39:58,699 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 [2018-10-02 11:39:58,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-02 11:39:58,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-02 11:39:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-02 11:39:58,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-02 11:39:58,703 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-02 11:39:58,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:58,703 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-02 11:39:58,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:39:58,704 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-02 11:39:58,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-02 11:39:58,704 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:58,704 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-10-02 11:39:58,704 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:58,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:58,704 INFO L82 PathProgramCache]: Analyzing trace with hash -437734365, now seen corresponding path program 34 times [2018-10-02 11:39:58,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:58,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:58,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:58,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:58,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:58,711 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:39:58,712 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:39:58,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:39:58,721 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:39:58,778 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:39:58,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:58,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:59,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:39:59,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-02 11:39:59,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 11:39:59,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 11:39:59,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:39:59,672 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-02 11:40:00,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:00,567 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-02 11:40:00,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:40:00,568 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-02 11:40:00,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:00,568 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:40:00,569 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:40:00,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:40:00,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:40:00,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-02 11:40:00,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 11:40:00,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-02 11:40:00,574 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-02 11:40:00,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:00,574 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-02 11:40:00,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 11:40:00,574 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-02 11:40:00,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 11:40:00,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:00,575 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-10-02 11:40:00,575 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:00,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:00,575 INFO L82 PathProgramCache]: Analyzing trace with hash -684861620, now seen corresponding path program 35 times [2018-10-02 11:40:00,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:00,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:00,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:00,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:00,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:00,583 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:40:00,583 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:40:00,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:40:00,600 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:00,684 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-02 11:40:00,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:00,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:02,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:40:02,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-02 11:40:02,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:40:02,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:40:02,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:40:02,284 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-02 11:40:03,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:03,336 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-02 11:40:03,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:40:03,337 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-02 11:40:03,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:03,337 INFO L225 Difference]: With dead ends: 42 [2018-10-02 11:40:03,337 INFO L226 Difference]: Without dead ends: 40 [2018-10-02 11:40:03,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:40:03,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-02 11:40:03,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-02 11:40:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-02 11:40:03,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-02 11:40:03,342 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-02 11:40:03,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:03,343 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-02 11:40:03,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:40:03,343 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-02 11:40:03,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-02 11:40:03,343 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:03,343 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-10-02 11:40:03,344 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:03,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:03,344 INFO L82 PathProgramCache]: Analyzing trace with hash 244128067, now seen corresponding path program 36 times [2018-10-02 11:40:03,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:03,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:03,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:03,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:03,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:03,351 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:40:03,352 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:40:03,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:40:03,367 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:03,574 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 11:40:03,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:03,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:04,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:40:04,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-02 11:40:04,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 11:40:04,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 11:40:04,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:40:04,685 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-02 11:40:05,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:05,749 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-02 11:40:05,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:40:05,749 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-02 11:40:05,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:05,750 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:40:05,750 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:40:05,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:40:05,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:40:05,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-02 11:40:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-02 11:40:05,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-02 11:40:05,756 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-02 11:40:05,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:05,756 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-02 11:40:05,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 11:40:05,756 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-02 11:40:05,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-02 11:40:05,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:05,757 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-10-02 11:40:05,757 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:05,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:05,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1021962708, now seen corresponding path program 37 times [2018-10-02 11:40:05,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:05,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:05,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:05,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:05,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:05,765 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:40:05,765 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:40:05,766 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:40:05,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:05,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:06,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:40:06,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-02 11:40:06,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:40:06,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:40:06,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:40:06,711 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-02 11:40:07,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:07,773 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-02 11:40:07,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:40:07,773 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-02 11:40:07,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:07,774 INFO L225 Difference]: With dead ends: 44 [2018-10-02 11:40:07,774 INFO L226 Difference]: Without dead ends: 42 [2018-10-02 11:40:07,775 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 [2018-10-02 11:40:07,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-02 11:40:07,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-02 11:40:07,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-02 11:40:07,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-02 11:40:07,779 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-02 11:40:07,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:07,779 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-02 11:40:07,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:40:07,780 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-02 11:40:07,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-02 11:40:07,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:07,780 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-10-02 11:40:07,781 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:07,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:07,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1616071069, now seen corresponding path program 38 times [2018-10-02 11:40:07,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:07,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:07,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:07,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:07,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:07,788 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:40:07,788 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:40:07,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:40:07,805 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:07,865 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:07,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:07,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:08,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:40:08,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-02 11:40:08,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:40:08,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:40:08,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:40:08,712 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-02 11:40:09,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:09,992 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-02 11:40:09,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:40:09,992 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-02 11:40:09,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:09,993 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:40:09,993 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:40:09,994 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 [2018-10-02 11:40:09,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:40:09,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-02 11:40:09,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-02 11:40:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-02 11:40:09,998 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-02 11:40:09,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:09,998 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-02 11:40:09,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:40:09,998 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-02 11:40:09,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-02 11:40:09,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:09,999 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-10-02 11:40:09,999 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:09,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:09,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1441406220, now seen corresponding path program 39 times [2018-10-02 11:40:09,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:09,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:10,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:10,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:10,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:10,006 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:40:10,006 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:40:10,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:40:10,019 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:11,403 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-02 11:40:11,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:11,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:12,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:40:12,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-02 11:40:12,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:40:12,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:40:12,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:40:12,310 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-10-02 11:40:13,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:13,488 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-02 11:40:13,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:40:13,488 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-02 11:40:13,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:13,489 INFO L225 Difference]: With dead ends: 46 [2018-10-02 11:40:13,489 INFO L226 Difference]: Without dead ends: 44 [2018-10-02 11:40:13,490 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 [2018-10-02 11:40:13,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-02 11:40:13,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-02 11:40:13,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-02 11:40:13,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-02 11:40:13,493 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-02 11:40:13,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:13,494 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-02 11:40:13,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:40:13,494 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-02 11:40:13,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-02 11:40:13,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:13,494 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-10-02 11:40:13,494 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:13,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:13,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1733921667, now seen corresponding path program 40 times [2018-10-02 11:40:13,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:13,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:13,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:13,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:13,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:13,502 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:40:13,503 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:40:13,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:40:13,520 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:13,609 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:13,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:13,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:15,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:40:15,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-02 11:40:15,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 11:40:15,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 11:40:15,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:40:15,263 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-10-02 11:40:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:16,552 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-02 11:40:16,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:40:16,552 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-10-02 11:40:16,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:16,553 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:40:16,553 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:40:16,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:40:16,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:40:16,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-02 11:40:16,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-02 11:40:16,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-02 11:40:16,557 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-02 11:40:16,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:16,557 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-02 11:40:16,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 11:40:16,557 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-02 11:40:16,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 11:40:16,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:16,558 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-10-02 11:40:16,558 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:16,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:16,558 INFO L82 PathProgramCache]: Analyzing trace with hash -2083001364, now seen corresponding path program 41 times [2018-10-02 11:40:16,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:16,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:16,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:16,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:16,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:16,566 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:40:16,566 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:40:16,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:40:16,585 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:16,674 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-02 11:40:16,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:16,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:17,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:40:17,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-02 11:40:17,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:40:17,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:40:17,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:40:17,705 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-10-02 11:40:18,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:18,983 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-02 11:40:18,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:40:18,990 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-10-02 11:40:18,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:18,990 INFO L225 Difference]: With dead ends: 48 [2018-10-02 11:40:18,990 INFO L226 Difference]: Without dead ends: 46 [2018-10-02 11:40:18,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:40:18,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-02 11:40:18,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-02 11:40:18,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-02 11:40:18,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-02 11:40:18,995 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-02 11:40:18,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:18,995 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-02 11:40:18,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:40:18,995 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-02 11:40:18,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-02 11:40:18,996 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:18,996 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-10-02 11:40:18,996 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:18,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:18,996 INFO L82 PathProgramCache]: Analyzing trace with hash -148531037, now seen corresponding path program 42 times [2018-10-02 11:40:18,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:18,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:18,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:18,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:18,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:19,004 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:40:19,004 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:40:19,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:40:19,014 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:19,494 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-02 11:40:19,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:19,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:21,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:40:21,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-02 11:40:21,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-02 11:40:21,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-02 11:40:21,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:40:21,460 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-10-02 11:40:22,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:22,894 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-02 11:40:22,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:40:22,895 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-10-02 11:40:22,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:22,895 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:40:22,895 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:40:22,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:40:22,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:40:22,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-02 11:40:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-02 11:40:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-02 11:40:22,901 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-02 11:40:22,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:22,901 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-02 11:40:22,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-02 11:40:22,901 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-02 11:40:22,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-02 11:40:22,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:22,901 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-10-02 11:40:22,902 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:22,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:22,902 INFO L82 PathProgramCache]: Analyzing trace with hash -309493044, now seen corresponding path program 43 times [2018-10-02 11:40:22,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:22,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:22,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:22,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:22,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:22,909 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:40:22,909 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:40:22,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:40:22,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:23,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:24,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:40:24,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-02 11:40:24,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:40:24,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:40:24,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:40:24,081 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-10-02 11:40:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:25,737 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-02 11:40:25,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 11:40:25,737 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-02 11:40:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:25,738 INFO L225 Difference]: With dead ends: 50 [2018-10-02 11:40:25,738 INFO L226 Difference]: Without dead ends: 48 [2018-10-02 11:40:25,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:40:25,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-02 11:40:25,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-02 11:40:25,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-02 11:40:25,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-02 11:40:25,743 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-02 11:40:25,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:25,743 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-02 11:40:25,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:40:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-02 11:40:25,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-02 11:40:25,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:25,744 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-10-02 11:40:25,744 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:25,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:25,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1004347965, now seen corresponding path program 44 times [2018-10-02 11:40:25,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:25,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:25,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:25,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:25,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:25,752 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:40:25,752 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:40:25,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:40:25,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:25,872 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:25,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:25,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:26,963 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:40:26,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-02 11:40:26,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:40:26,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:40:26,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:40:26,965 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-10-02 11:40:28,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:28,413 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-02 11:40:28,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:40:28,414 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-10-02 11:40:28,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:28,415 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:40:28,415 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:40:28,416 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 [2018-10-02 11:40:28,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:40:28,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-02 11:40:28,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-02 11:40:28,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-02 11:40:28,420 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-02 11:40:28,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:28,420 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-02 11:40:28,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:40:28,421 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-02 11:40:28,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-02 11:40:28,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:28,421 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-10-02 11:40:28,421 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:28,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:28,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1070014036, now seen corresponding path program 45 times [2018-10-02 11:40:28,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:28,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:28,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:28,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:28,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:28,429 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:40:28,429 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:40:28,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:40:28,444 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:30,991 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-02 11:40:30,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:30,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:32,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:40:32,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-02 11:40:32,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:40:32,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:40:32,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:40:32,209 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-10-02 11:40:33,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:33,723 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-02 11:40:33,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:40:33,724 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-10-02 11:40:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:33,725 INFO L225 Difference]: With dead ends: 52 [2018-10-02 11:40:33,725 INFO L226 Difference]: Without dead ends: 50 [2018-10-02 11:40:33,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:40:33,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-02 11:40:33,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-02 11:40:33,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-02 11:40:33,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-02 11:40:33,729 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-02 11:40:33,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:33,729 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-02 11:40:33,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:40:33,729 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-02 11:40:33,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-02 11:40:33,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:33,730 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-10-02 11:40:33,730 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:33,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:33,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1189305059, now seen corresponding path program 46 times [2018-10-02 11:40:33,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:33,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:33,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:33,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:33,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:33,738 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:40:33,739 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:40:33,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:40:33,752 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:33,871 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:33,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:33,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:35,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:40:35,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-02 11:40:35,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-02 11:40:35,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-02 11:40:35,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:40:35,819 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-10-02 11:40:37,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:37,404 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-02 11:40:37,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:40:37,404 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-10-02 11:40:37,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:37,405 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:40:37,405 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:40:37,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:40:37,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:40:37,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-02 11:40:37,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-02 11:40:37,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-02 11:40:37,409 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-02 11:40:37,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:37,410 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-02 11:40:37,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-02 11:40:37,410 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-02 11:40:37,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-02 11:40:37,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:37,410 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-10-02 11:40:37,411 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:37,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:37,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1786247028, now seen corresponding path program 47 times [2018-10-02 11:40:37,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:37,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:37,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:37,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:37,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:37,419 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:40:37,419 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:40:37,419 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:40:37,432 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:37,553 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-02 11:40:37,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:37,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:38,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:40:38,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-02 11:40:38,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:40:38,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:40:38,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:40:38,769 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-10-02 11:40:40,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:40,631 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-02 11:40:40,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:40:40,631 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-02 11:40:40,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:40,632 INFO L225 Difference]: With dead ends: 54 [2018-10-02 11:40:40,633 INFO L226 Difference]: Without dead ends: 52 [2018-10-02 11:40:40,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:40:40,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-02 11:40:40,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-02 11:40:40,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-02 11:40:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-02 11:40:40,637 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-02 11:40:40,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:40,638 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-02 11:40:40,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:40:40,638 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-02 11:40:40,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-02 11:40:40,638 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:40,638 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-10-02 11:40:40,639 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:40,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:40,639 INFO L82 PathProgramCache]: Analyzing trace with hash 460918787, now seen corresponding path program 48 times [2018-10-02 11:40:40,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:40,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:40,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:40,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:40,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:40,646 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:40:40,646 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:40:40,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:40:40,653 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:41,325 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-02 11:40:41,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:41,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:42,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:40:42,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-02 11:40:42,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-02 11:40:42,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-02 11:40:42,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:40:42,583 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-10-02 11:40:44,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:44,301 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-02 11:40:44,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:40:44,301 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-10-02 11:40:44,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:44,302 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:40:44,303 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:40:44,303 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 [2018-10-02 11:40:44,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:40:44,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-02 11:40:44,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-02 11:40:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-02 11:40:44,307 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-02 11:40:44,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:44,308 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-02 11:40:44,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-02 11:40:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-02 11:40:44,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-02 11:40:44,308 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:44,308 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-10-02 11:40:44,309 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:44,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:44,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1403582316, now seen corresponding path program 49 times [2018-10-02 11:40:44,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:44,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:44,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:44,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:44,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:44,316 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:40:44,316 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:40:44,316 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:40:44,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:44,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:46,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:40:46,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-02 11:40:46,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 11:40:46,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 11:40:46,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:40:46,010 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-10-02 11:40:47,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:47,963 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-02 11:40:47,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:40:47,964 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-10-02 11:40:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:47,964 INFO L225 Difference]: With dead ends: 56 [2018-10-02 11:40:47,965 INFO L226 Difference]: Without dead ends: 54 [2018-10-02 11:40:47,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:40:47,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-02 11:40:47,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-02 11:40:47,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-02 11:40:47,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-02 11:40:47,971 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-02 11:40:47,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:47,971 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-02 11:40:47,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 11:40:47,971 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-02 11:40:47,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-02 11:40:47,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:47,972 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-10-02 11:40:47,972 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:47,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:47,973 INFO L82 PathProgramCache]: Analyzing trace with hash 561380643, now seen corresponding path program 50 times [2018-10-02 11:40:47,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:47,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:47,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:47,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:47,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:47,981 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:40:47,982 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:40:47,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:40:47,998 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:48,179 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:48,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:48,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:49,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:40:49,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-02 11:40:49,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 11:40:49,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 11:40:49,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:40:49,735 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-10-02 11:40:51,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:51,914 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-02 11:40:51,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:40:51,915 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-02 11:40:51,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:51,916 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:40:51,916 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:40:51,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:40:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:40:51,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-02 11:40:51,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-02 11:40:51,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-02 11:40:51,921 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-02 11:40:51,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:51,921 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-02 11:40:51,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 11:40:51,921 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-02 11:40:51,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-02 11:40:51,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:51,922 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-10-02 11:40:51,922 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:51,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:51,922 INFO L82 PathProgramCache]: Analyzing trace with hash 222932556, now seen corresponding path program 51 times [2018-10-02 11:40:51,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:51,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:51,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:51,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:51,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:51,930 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:40:51,931 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:40:51,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:40:51,951 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:56,301 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-02 11:40:56,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:56,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:40:57,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:40:57,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-02 11:40:57,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 11:40:57,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 11:40:57,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:40:57,722 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-10-02 11:40:59,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:59,661 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-02 11:40:59,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 11:40:59,662 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-02 11:40:59,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:59,662 INFO L225 Difference]: With dead ends: 58 [2018-10-02 11:40:59,663 INFO L226 Difference]: Without dead ends: 56 [2018-10-02 11:40:59,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:40:59,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-02 11:40:59,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-02 11:40:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-02 11:40:59,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-02 11:40:59,669 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-02 11:40:59,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:59,669 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-02 11:40:59,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 11:40:59,669 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-02 11:40:59,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-02 11:40:59,670 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:59,670 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-10-02 11:40:59,670 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:59,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:59,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1679023549, now seen corresponding path program 52 times [2018-10-02 11:40:59,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:59,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:59,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:59,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:59,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:59,678 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:40:59,678 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:40:59,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:40:59,689 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:59,799 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:59,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:59,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:01,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:41:01,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-02 11:41:01,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-02 11:41:01,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-02 11:41:01,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:41:01,458 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-10-02 11:41:03,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:03,525 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-02 11:41:03,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 11:41:03,526 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-10-02 11:41:03,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:03,527 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:41:03,527 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:41:03,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:41:03,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:41:03,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-02 11:41:03,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-02 11:41:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-02 11:41:03,533 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-02 11:41:03,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:03,534 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-02 11:41:03,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-02 11:41:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-02 11:41:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-02 11:41:03,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:03,534 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-10-02 11:41:03,535 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:03,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:03,535 INFO L82 PathProgramCache]: Analyzing trace with hash -510120660, now seen corresponding path program 53 times [2018-10-02 11:41:03,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:03,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:03,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:03,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:03,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:03,543 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:41:03,543 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:41:03,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:41:03,558 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:41:03,707 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-02 11:41:03,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:03,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:05,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:41:05,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-10-02 11:41:05,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 11:41:05,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 11:41:05,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:41:05,500 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-10-02 11:41:07,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:07,615 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-02 11:41:07,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 11:41:07,616 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-10-02 11:41:07,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:07,617 INFO L225 Difference]: With dead ends: 60 [2018-10-02 11:41:07,617 INFO L226 Difference]: Without dead ends: 58 [2018-10-02 11:41:07,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:41:07,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-02 11:41:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-02 11:41:07,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-02 11:41:07,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-02 11:41:07,621 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-02 11:41:07,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:07,621 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-02 11:41:07,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 11:41:07,621 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-02 11:41:07,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-02 11:41:07,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:07,622 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-10-02 11:41:07,622 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:07,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:07,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1366130531, now seen corresponding path program 54 times [2018-10-02 11:41:07,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:07,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:07,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:07,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:07,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:07,631 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:41:07,631 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:41:07,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:41:07,651 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:41:09,053 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-02 11:41:09,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:09,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:10,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:41:10,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-02 11:41:10,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-02 11:41:10,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-02 11:41:10,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:41:10,917 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-10-02 11:41:13,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:13,083 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-02 11:41:13,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 11:41:13,084 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-10-02 11:41:13,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:13,085 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:41:13,085 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:41:13,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:41:13,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:41:13,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-02 11:41:13,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 11:41:13,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-02 11:41:13,090 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-02 11:41:13,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:13,090 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-02 11:41:13,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-02 11:41:13,090 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-02 11:41:13,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 11:41:13,091 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:13,091 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-10-02 11:41:13,091 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:13,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:13,091 INFO L82 PathProgramCache]: Analyzing trace with hash -599624692, now seen corresponding path program 55 times [2018-10-02 11:41:13,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:13,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:13,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:13,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:13,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:13,099 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:41:13,100 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:41:13,100 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:41:13,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:13,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:14,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:41:14,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-02 11:41:14,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 11:41:14,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 11:41:14,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:41:14,900 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-10-02 11:41:17,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:17,324 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-02 11:41:17,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 11:41:17,325 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-02 11:41:17,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:17,326 INFO L225 Difference]: With dead ends: 62 [2018-10-02 11:41:17,326 INFO L226 Difference]: Without dead ends: 60 [2018-10-02 11:41:17,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:41:17,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-02 11:41:17,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-02 11:41:17,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-02 11:41:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-02 11:41:17,330 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-02 11:41:17,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:17,330 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-02 11:41:17,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 11:41:17,331 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-02 11:41:17,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-02 11:41:17,331 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:17,331 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-10-02 11:41:17,332 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:17,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:17,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1408494461, now seen corresponding path program 56 times [2018-10-02 11:41:17,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:17,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:17,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:17,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:17,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:17,341 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:41:17,341 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:41:17,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:41:17,356 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:41:17,480 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:41:17,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:17,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:19,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:41:19,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-02 11:41:19,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 11:41:19,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 11:41:19,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:41:19,236 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-10-02 11:41:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:21,765 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-02 11:41:21,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:41:21,765 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-10-02 11:41:21,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:21,766 INFO L225 Difference]: With dead ends: 63 [2018-10-02 11:41:21,766 INFO L226 Difference]: Without dead ends: 61 [2018-10-02 11:41:21,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:41:21,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-02 11:41:21,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-02 11:41:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-02 11:41:21,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-02 11:41:21,771 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-02 11:41:21,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:21,772 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-02 11:41:21,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 11:41:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-02 11:41:21,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-02 11:41:21,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:21,772 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-10-02 11:41:21,772 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:21,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:21,773 INFO L82 PathProgramCache]: Analyzing trace with hash -713653524, now seen corresponding path program 57 times [2018-10-02 11:41:21,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:21,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:21,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:21,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:21,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:21,779 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:41:21,779 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:41:21,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:41:21,797 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:41:29,426 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-02 11:41:29,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:29,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:31,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:41:31,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-10-02 11:41:31,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 11:41:31,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 11:41:31,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:41:31,457 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-10-02 11:41:33,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:33,900 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-02 11:41:33,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 11:41:33,901 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-10-02 11:41:33,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:33,901 INFO L225 Difference]: With dead ends: 64 [2018-10-02 11:41:33,902 INFO L226 Difference]: Without dead ends: 62 [2018-10-02 11:41:33,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:41:33,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-02 11:41:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-02 11:41:33,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-02 11:41:33,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-02 11:41:33,907 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-02 11:41:33,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:33,907 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-02 11:41:33,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 11:41:33,908 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-02 11:41:33,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-02 11:41:33,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:33,908 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-10-02 11:41:33,908 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:33,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:33,909 INFO L82 PathProgramCache]: Analyzing trace with hash -648420957, now seen corresponding path program 58 times [2018-10-02 11:41:33,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:33,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:33,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:33,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:33,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:33,916 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:41:33,917 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:41:33,917 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 [2018-10-02 11:41:33,933 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:41:34,076 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:41:34,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:34,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:36,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:41:36,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-02 11:41:36,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-02 11:41:36,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-02 11:41:36,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:41:36,323 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-10-02 11:41:38,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:38,811 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-02 11:41:38,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 11:41:38,812 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-10-02 11:41:38,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:38,813 INFO L225 Difference]: With dead ends: 65 [2018-10-02 11:41:38,813 INFO L226 Difference]: Without dead ends: 63 [2018-10-02 11:41:38,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:41:38,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-02 11:41:38,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-02 11:41:38,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-02 11:41:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-02 11:41:38,818 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-02 11:41:38,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:38,818 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-02 11:41:38,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-02 11:41:38,818 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-02 11:41:38,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 11:41:38,819 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:38,819 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-10-02 11:41:38,819 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:38,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:38,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1373788620, now seen corresponding path program 59 times [2018-10-02 11:41:38,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:38,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:38,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:38,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:38,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:38,827 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:41:38,827 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:41:38,827 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 [2018-10-02 11:41:38,838 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:41:39,032 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-02 11:41:39,032 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:39,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:42,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:41:42,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-02 11:41:42,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 11:41:42,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 11:41:42,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:41:42,375 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-10-02 11:41:44,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:44,951 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-02 11:41:44,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 11:41:44,951 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-02 11:41:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:44,952 INFO L225 Difference]: With dead ends: 66 [2018-10-02 11:41:44,952 INFO L226 Difference]: Without dead ends: 64 [2018-10-02 11:41:44,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:41:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-02 11:41:44,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-02 11:41:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-02 11:41:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-02 11:41:44,957 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-02 11:41:44,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:44,957 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-02 11:41:44,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 11:41:44,957 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-02 11:41:44,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-02 11:41:44,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:44,958 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-10-02 11:41:44,958 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:44,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:44,958 INFO L82 PathProgramCache]: Analyzing trace with hash -362223933, now seen corresponding path program 60 times [2018-10-02 11:41:44,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:44,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:44,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:44,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:44,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:44,964 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:41:44,964 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:41:44,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:41:44,974 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:41:46,836 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-02 11:41:46,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:46,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:48,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:41:48,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-02 11:41:48,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-02 11:41:48,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-02 11:41:48,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:41:48,748 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-10-02 11:41:51,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:51,526 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-02 11:41:51,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 11:41:51,527 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-10-02 11:41:51,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:51,527 INFO L225 Difference]: With dead ends: 67 [2018-10-02 11:41:51,527 INFO L226 Difference]: Without dead ends: 65 [2018-10-02 11:41:51,528 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 [2018-10-02 11:41:51,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-02 11:41:51,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-02 11:41:51,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-02 11:41:51,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-02 11:41:51,531 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-02 11:41:51,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:51,532 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-02 11:41:51,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-02 11:41:51,532 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-02 11:41:51,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-02 11:41:51,532 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:51,532 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-10-02 11:41:51,532 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:51,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:51,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1655961772, now seen corresponding path program 61 times [2018-10-02 11:41:51,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:51,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:51,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:51,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:51,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:51,540 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:41:51,540 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:41:51,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:41:51,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:51,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:53,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:41:53,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-10-02 11:41:53,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 11:41:53,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 11:41:53,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:41:53,643 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-10-02 11:41:56,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:56,413 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-02 11:41:56,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 11:41:56,414 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-10-02 11:41:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:56,414 INFO L225 Difference]: With dead ends: 68 [2018-10-02 11:41:56,415 INFO L226 Difference]: Without dead ends: 66 [2018-10-02 11:41:56,415 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 [2018-10-02 11:41:56,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-02 11:41:56,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-02 11:41:56,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-02 11:41:56,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-02 11:41:56,419 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-02 11:41:56,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:56,420 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-02 11:41:56,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 11:41:56,420 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-02 11:41:56,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-02 11:41:56,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:56,420 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-10-02 11:41:56,420 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:56,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:56,421 INFO L82 PathProgramCache]: Analyzing trace with hash -204790813, now seen corresponding path program 62 times [2018-10-02 11:41:56,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:56,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:56,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:56,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:56,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:56,428 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:41:56,428 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:41:56,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:41:56,440 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:41:56,595 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:41:56,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:56,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:41:58,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:41:58,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-02 11:41:58,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-02 11:41:58,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-02 11:41:58,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:41:58,670 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-10-02 11:42:01,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:01,547 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-02 11:42:01,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 11:42:01,547 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-10-02 11:42:01,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:01,548 INFO L225 Difference]: With dead ends: 69 [2018-10-02 11:42:01,548 INFO L226 Difference]: Without dead ends: 67 [2018-10-02 11:42:01,548 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 [2018-10-02 11:42:01,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-02 11:42:01,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-02 11:42:01,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-02 11:42:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-02 11:42:01,551 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-02 11:42:01,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:01,552 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-02 11:42:01,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-02 11:42:01,552 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-02 11:42:01,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-02 11:42:01,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:01,552 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-10-02 11:42:01,552 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:01,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:01,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2053546100, now seen corresponding path program 63 times [2018-10-02 11:42:01,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:01,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:01,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:01,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:01,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:01,560 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:42:01,560 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:42:01,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:42:01,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:42:14,139 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-02 11:42:14,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:14,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:16,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:42:16,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-02 11:42:16,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 11:42:16,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 11:42:16,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:42:16,274 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-10-02 11:42:19,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:19,520 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-02 11:42:19,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 11:42:19,520 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-02 11:42:19,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:19,521 INFO L225 Difference]: With dead ends: 70 [2018-10-02 11:42:19,521 INFO L226 Difference]: Without dead ends: 68 [2018-10-02 11:42:19,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:42:19,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-02 11:42:19,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-02 11:42:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-02 11:42:19,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-02 11:42:19,527 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-02 11:42:19,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:19,527 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-02 11:42:19,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 11:42:19,527 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-02 11:42:19,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-02 11:42:19,528 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:19,528 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-10-02 11:42:19,528 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:19,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:19,528 INFO L82 PathProgramCache]: Analyzing trace with hash 764582147, now seen corresponding path program 64 times [2018-10-02 11:42:19,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:19,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:19,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:19,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:19,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:19,536 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:42:19,536 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:42:19,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:42:19,545 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:42:19,742 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:42:19,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:19,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:21,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:42:21,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-02 11:42:21,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-02 11:42:21,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-02 11:42:21,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:42:21,955 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-10-02 11:42:25,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:25,141 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-02 11:42:25,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 11:42:25,142 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-10-02 11:42:25,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:25,143 INFO L225 Difference]: With dead ends: 71 [2018-10-02 11:42:25,143 INFO L226 Difference]: Without dead ends: 69 [2018-10-02 11:42:25,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:42:25,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-02 11:42:25,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-02 11:42:25,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-02 11:42:25,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-02 11:42:25,147 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-02 11:42:25,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:25,148 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-02 11:42:25,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-02 11:42:25,148 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-02 11:42:25,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-02 11:42:25,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:25,148 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-10-02 11:42:25,149 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:25,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:25,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2067755412, now seen corresponding path program 65 times [2018-10-02 11:42:25,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:25,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:25,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:25,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:25,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:25,156 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:42:25,156 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:42:25,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:42:25,166 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:42:25,432 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-02 11:42:25,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:25,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:27,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:42:27,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-10-02 11:42:27,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 11:42:27,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 11:42:27,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:42:27,946 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-10-02 11:42:31,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:31,071 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-02 11:42:31,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 11:42:31,072 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-10-02 11:42:31,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:31,073 INFO L225 Difference]: With dead ends: 72 [2018-10-02 11:42:31,073 INFO L226 Difference]: Without dead ends: 70 [2018-10-02 11:42:31,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:42:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-02 11:42:31,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-02 11:42:31,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-02 11:42:31,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-02 11:42:31,079 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-02 11:42:31,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:31,079 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-02 11:42:31,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 11:42:31,079 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-02 11:42:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-02 11:42:31,080 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:31,080 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-10-02 11:42:31,080 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:31,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:31,080 INFO L82 PathProgramCache]: Analyzing trace with hash 324093475, now seen corresponding path program 66 times [2018-10-02 11:42:31,081 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:31,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:31,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:31,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:31,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:31,088 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:42:31,088 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:42:31,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:42:31,101 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:42:34,442 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-02 11:42:34,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:34,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:38,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:42:38,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2018-10-02 11:42:38,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-02 11:42:38,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-02 11:42:38,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:42:38,948 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-10-02 11:42:42,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:42,159 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-02 11:42:42,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 11:42:42,160 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-10-02 11:42:42,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:42,161 INFO L225 Difference]: With dead ends: 73 [2018-10-02 11:42:42,161 INFO L226 Difference]: Without dead ends: 71 [2018-10-02 11:42:42,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:42:42,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-02 11:42:42,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-02 11:42:42,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-02 11:42:42,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-02 11:42:42,165 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-02 11:42:42,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:42,166 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-02 11:42:42,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-02 11:42:42,166 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-02 11:42:42,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-02 11:42:42,166 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:42,166 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-10-02 11:42:42,167 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:42,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:42,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1456964940, now seen corresponding path program 67 times [2018-10-02 11:42:42,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:42,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:42,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:42,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:42,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:42,173 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:42:42,173 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:42:42,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:42:42,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:42:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:42,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:45,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:42:45,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2018-10-02 11:42:45,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 11:42:45,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 11:42:45,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:42:45,055 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-10-02 11:42:49,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:49,679 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-02 11:42:49,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 11:42:49,687 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-10-02 11:42:49,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:49,688 INFO L225 Difference]: With dead ends: 74 [2018-10-02 11:42:49,688 INFO L226 Difference]: Without dead ends: 72 [2018-10-02 11:42:49,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:42:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-02 11:42:49,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-02 11:42:49,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-02 11:42:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-02 11:42:49,692 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-02 11:42:49,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:49,692 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-02 11:42:49,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 11:42:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-02 11:42:49,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-02 11:42:49,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:49,693 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-10-02 11:42:49,693 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:49,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:49,693 INFO L82 PathProgramCache]: Analyzing trace with hash -2078725309, now seen corresponding path program 68 times [2018-10-02 11:42:49,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:49,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:49,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:49,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:42:49,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:49,709 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:42:49,709 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:42:49,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:42:49,717 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:42:49,934 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:42:49,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:49,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:42:52,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:42:52,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2018-10-02 11:42:52,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-02 11:42:52,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-02 11:42:52,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:42:52,601 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-10-02 11:42:56,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:56,158 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-02 11:42:56,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 11:42:56,159 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-10-02 11:42:56,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:56,160 INFO L225 Difference]: With dead ends: 75 [2018-10-02 11:42:56,160 INFO L226 Difference]: Without dead ends: 73 [2018-10-02 11:42:56,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:42:56,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-02 11:42:56,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-02 11:42:56,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-02 11:42:56,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-02 11:42:56,165 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-02 11:42:56,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:56,165 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-02 11:42:56,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-02 11:42:56,165 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-02 11:42:56,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-02 11:42:56,165 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:56,165 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-10-02 11:42:56,166 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:56,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:56,166 INFO L82 PathProgramCache]: Analyzing trace with hash -15973332, now seen corresponding path program 69 times [2018-10-02 11:42:56,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:56,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:56,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:56,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:56,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:56,174 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:42:56,174 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:42:56,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:42:56,189 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:16,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-02 11:43:16,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:16,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:18,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:18,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2018-10-02 11:43:18,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 11:43:18,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 11:43:18,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:43:18,961 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-10-02 11:43:22,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:22,725 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-02 11:43:22,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 11:43:22,725 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-10-02 11:43:22,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:22,726 INFO L225 Difference]: With dead ends: 76 [2018-10-02 11:43:22,726 INFO L226 Difference]: Without dead ends: 74 [2018-10-02 11:43:22,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:43:22,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-02 11:43:22,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-02 11:43:22,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-02 11:43:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-02 11:43:22,733 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-02 11:43:22,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:22,733 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-02 11:43:22,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 11:43:22,733 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-02 11:43:22,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-02 11:43:22,734 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:22,734 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-10-02 11:43:22,734 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:22,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:22,734 INFO L82 PathProgramCache]: Analyzing trace with hash -495171485, now seen corresponding path program 70 times [2018-10-02 11:43:22,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:22,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:22,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:22,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:22,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:22,743 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:22,744 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:22,744 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:22,759 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:23,138 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:23,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:23,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:25,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:25,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2018-10-02 11:43:25,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-02 11:43:25,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-02 11:43:25,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:43:25,979 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-10-02 11:43:29,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:29,774 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-02 11:43:29,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-02 11:43:29,775 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-10-02 11:43:29,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:29,776 INFO L225 Difference]: With dead ends: 77 [2018-10-02 11:43:29,776 INFO L226 Difference]: Without dead ends: 75 [2018-10-02 11:43:29,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:43:29,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-02 11:43:29,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-02 11:43:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-02 11:43:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-02 11:43:29,782 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-02 11:43:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:29,783 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-02 11:43:29,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-02 11:43:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-02 11:43:29,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-02 11:43:29,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:29,784 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-10-02 11:43:29,784 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:29,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:29,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1829554956, now seen corresponding path program 71 times [2018-10-02 11:43:29,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:29,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:29,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:29,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:29,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:29,791 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:29,792 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:29,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:29,806 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:30,141 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-02 11:43:30,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:30,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:43:32,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 11:43:32,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2018-10-02 11:43:32,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 11:43:32,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 11:43:32,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:43:32,700 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-10-02 11:43:36,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:36,572 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-02 11:43:36,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-02 11:43:36,573 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-10-02 11:43:36,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:36,574 INFO L225 Difference]: With dead ends: 78 [2018-10-02 11:43:36,574 INFO L226 Difference]: Without dead ends: 76 [2018-10-02 11:43:36,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:43:36,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-02 11:43:36,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-02 11:43:36,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-02 11:43:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-02 11:43:36,580 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-02 11:43:36,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:36,580 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-02 11:43:36,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 11:43:36,581 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-02 11:43:36,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-02 11:43:36,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:36,581 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-10-02 11:43:36,581 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:36,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:36,582 INFO L82 PathProgramCache]: Analyzing trace with hash 881630595, now seen corresponding path program 72 times [2018-10-02 11:43:36,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:36,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:36,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:36,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:36,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:36,589 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 11:43:36,590 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 11:43:36,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:36,604 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:40,948 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-02 11:43:40,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:40,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-02 11:43:41,729 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-02 11:43:41,930 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 11:43:41,930 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 11:43:41,937 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 11:43:41,937 INFO L202 PluginConnector]: Adding new model gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:43:41 BoogieIcfgContainer [2018-10-02 11:43:41,937 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 11:43:41,938 INFO L168 Benchmark]: Toolchain (without parser) took 256625.66 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 62.9 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 306.6 MB). Peak memory consumption was 369.5 MB. Max. memory is 7.1 GB. [2018-10-02 11:43:41,940 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:43:41,940 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.26 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. [2018-10-02 11:43:41,941 INFO L168 Benchmark]: Boogie Preprocessor took 19.10 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. [2018-10-02 11:43:41,941 INFO L168 Benchmark]: RCFGBuilder took 275.97 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. [2018-10-02 11:43:41,942 INFO L168 Benchmark]: TraceAbstraction took 256283.65 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 62.9 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 285.5 MB). Peak memory consumption was 348.4 MB. Max. memory is 7.1 GB. [2018-10-02 11:43:41,944 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.26 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 19.10 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 275.97 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 256283.65 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 62.9 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 285.5 MB). Peak memory consumption was 348.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 46). Cancelled while BasicCegarLoop was analyzing trace of length 76 with TraceHistMax 72, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 37 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 256.2s OverallTime, 73 OverallIterations, 72 TraceHistogramMax, 99.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 216 SDtfs, 0 SDslu, 2628 SDs, 0 SdLazy, 132276 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 82.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2700 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2628 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.6s 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, 61.8s SatisfiabilityAnalysisTime, 85.2s 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-0-2018-10-02_11-43-41-960.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-0-2018-10-02_11-43-41-960.csv Completed graceful shutdown