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/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:35:15,961 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:35:15,963 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:35:15,979 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:35:15,979 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:35:15,980 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:35:15,981 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:35:15,983 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:35:15,985 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:35:15,986 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:35:15,987 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 19:35:16,011 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:35:16,031 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:35:16,032 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:35:16,033 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:35:16,033 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:35:16,034 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:35:16,034 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:35:16,034 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:35:16,034 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:35:16,034 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:35:16,035 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:35:16,035 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:35:16,035 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:35:16,035 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:35:16,035 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:35:16,035 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:35:16,036 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:35:16,036 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:35:16,036 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:35:16,036 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:35:16,036 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:35:16,037 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:35:16,037 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:35:16,037 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:35:16,037 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:35:16,037 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:35:16,038 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:35:16,038 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:35:16,038 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:35:16,038 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:35:16,038 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:35:16,100 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:35:16,116 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:35:16,123 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:35:16,125 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:35:16,126 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:35:16,127 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-23 19:35:16,127 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl' [2018-09-23 19:35:16,181 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:35:16,184 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:35:16,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:35:16,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:35:16,186 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:35:16,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:16" (1/1) ... [2018-09-23 19:35:16,218 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:16" (1/1) ... [2018-09-23 19:35:16,224 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:35:16,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:35:16,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:35:16,225 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:35:16,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:16" (1/1) ... [2018-09-23 19:35:16,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:16" (1/1) ... [2018-09-23 19:35:16,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:16" (1/1) ... [2018-09-23 19:35:16,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:16" (1/1) ... [2018-09-23 19:35:16,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:16" (1/1) ... [2018-09-23 19:35:16,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:16" (1/1) ... [2018-09-23 19:35:16,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:16" (1/1) ... [2018-09-23 19:35:16,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:35:16,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:35:16,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:35:16,249 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:35:16,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:35:16,315 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-23 19:35:16,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 19:35:16,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 19:35:16,619 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 19:35:16,620 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:35:16 BoogieIcfgContainer [2018-09-23 19:35:16,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:35:16,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:35:16,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:35:16,625 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:35:16,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:16" (1/2) ... [2018-09-23 19:35:16,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123bb89e and model type fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:35:16, skipping insertion in model container [2018-09-23 19:35:16,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:35:16" (2/2) ... [2018-09-23 19:35:16,628 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-23 19:35:16,638 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:35:16,646 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:35:16,695 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:35:16,696 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:35:16,696 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:35:16,696 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:35:16,697 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:35:16,697 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:35:16,697 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:35:16,697 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:35:16,697 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:35:16,711 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-09-23 19:35:16,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:35:16,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:16,719 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:35:16,720 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:16,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:16,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1807861163, now seen corresponding path program 1 times [2018-09-23 19:35:16,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:16,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:16,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:16,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:16,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:16,908 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:35:16,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 19:35:16,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:35:16,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:35:16,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:35:16,956 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-09-23 19:35:17,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:17,028 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-09-23 19:35:17,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:35:17,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-09-23 19:35:17,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:17,040 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:35:17,040 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 19:35:17,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:35:17,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 19:35:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 19:35:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 19:35:17,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-23 19:35:17,082 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-09-23 19:35:17,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:17,082 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-23 19:35:17,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:35:17,082 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-23 19:35:17,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:35:17,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:17,083 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:35:17,084 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:17,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:17,084 INFO L82 PathProgramCache]: Analyzing trace with hash 89245487, now seen corresponding path program 1 times [2018-09-23 19:35:17,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:17,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:17,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:17,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:17,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:17,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:17,176 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:17,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:17,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:17,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:17,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 19:35:17,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:35:17,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:35:17,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:35:17,265 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-09-23 19:35:17,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:17,294 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-09-23 19:35:17,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:35:17,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-09-23 19:35:17,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:17,295 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:35:17,295 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 19:35:17,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:35:17,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 19:35:17,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 19:35:17,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 19:35:17,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-09-23 19:35:17,300 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-09-23 19:35:17,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:17,300 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-09-23 19:35:17,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:35:17,301 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-09-23 19:35:17,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:35:17,301 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:17,301 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:35:17,302 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:17,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:17,302 INFO L82 PathProgramCache]: Analyzing trace with hash 2061989811, now seen corresponding path program 2 times [2018-09-23 19:35:17,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:17,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:17,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:17,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:17,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:17,399 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:35:17,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-23 19:35:17,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:35:17,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:35:17,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:35:17,400 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 5 states. [2018-09-23 19:35:17,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:17,517 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2018-09-23 19:35:17,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:35:17,519 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-09-23 19:35:17,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:17,520 INFO L225 Difference]: With dead ends: 32 [2018-09-23 19:35:17,520 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:35:17,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:35:17,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:35:17,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2018-09-23 19:35:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:35:17,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2018-09-23 19:35:17,533 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2018-09-23 19:35:17,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:17,534 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2018-09-23 19:35:17,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:35:17,534 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2018-09-23 19:35:17,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:35:17,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:17,535 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:35:17,535 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:17,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:17,536 INFO L82 PathProgramCache]: Analyzing trace with hash 2062049393, now seen corresponding path program 1 times [2018-09-23 19:35:17,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:17,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:17,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:17,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:17,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-23 19:35:17,601 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:35:17,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-23 19:35:17,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:35:17,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:35:17,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:35:17,603 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2018-09-23 19:35:17,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:17,708 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2018-09-23 19:35:17,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:35:17,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-09-23 19:35:17,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:17,710 INFO L225 Difference]: With dead ends: 26 [2018-09-23 19:35:17,710 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 19:35:17,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:35:17,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 19:35:17,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2018-09-23 19:35:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 19:35:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-09-23 19:35:17,718 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 11 [2018-09-23 19:35:17,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:17,718 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-09-23 19:35:17,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:35:17,719 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-09-23 19:35:17,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:35:17,719 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:17,720 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2018-09-23 19:35:17,720 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:17,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:17,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1980186676, now seen corresponding path program 1 times [2018-09-23 19:35:17,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:17,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:17,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:17,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:17,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:17,857 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:17,857 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:17,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:17,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:17,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:17,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 19:35:17,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:35:17,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:35:17,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:35:17,975 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2018-09-23 19:35:18,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:18,082 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2018-09-23 19:35:18,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:35:18,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-09-23 19:35:18,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:18,084 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:35:18,084 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:35:18,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:35:18,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:35:18,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 19:35:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 19:35:18,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-09-23 19:35:18,092 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-09-23 19:35:18,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:18,092 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-09-23 19:35:18,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:35:18,093 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-09-23 19:35:18,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:35:18,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:18,094 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:18,094 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:18,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:18,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1317950664, now seen corresponding path program 2 times [2018-09-23 19:35:18,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:18,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:18,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:18,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:18,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:18,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:18,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:18,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:35:18,444 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:35:18,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:18,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:18,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:18,475 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:35:18,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:35:18,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:35:18,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:35:18,476 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2018-09-23 19:35:18,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:18,622 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2018-09-23 19:35:18,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:35:18,622 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-09-23 19:35:18,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:18,623 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:35:18,623 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 19:35:18,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:35:18,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 19:35:18,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 19:35:18,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 19:35:18,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-23 19:35:18,630 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2018-09-23 19:35:18,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:18,631 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-23 19:35:18,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:35:18,631 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-23 19:35:18,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:35:18,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:18,632 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:18,632 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:18,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:18,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1142069956, now seen corresponding path program 3 times [2018-09-23 19:35:18,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:18,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:18,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:18,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:18,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:18,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:18,769 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:18,783 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:18,810 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-23 19:35:18,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:18,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:18,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:18,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:35:18,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:35:18,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:35:18,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:35:18,847 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2018-09-23 19:35:18,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:18,891 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2018-09-23 19:35:18,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:35:18,898 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2018-09-23 19:35:18,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:18,899 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:35:18,899 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:35:18,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:35:18,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:35:18,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 19:35:18,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 19:35:18,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-09-23 19:35:18,907 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2018-09-23 19:35:18,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:18,908 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-09-23 19:35:18,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:35:18,908 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-09-23 19:35:18,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:35:18,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:18,910 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:18,911 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:18,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:18,911 INFO L82 PathProgramCache]: Analyzing trace with hash -375565888, now seen corresponding path program 4 times [2018-09-23 19:35:18,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:18,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:18,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:18,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:18,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:19,147 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:19,147 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:19,164 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:19,206 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:19,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:19,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:19,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:19,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:35:19,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:35:19,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:35:19,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:35:19,246 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2018-09-23 19:35:19,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:19,332 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2018-09-23 19:35:19,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:35:19,335 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-09-23 19:35:19,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:19,336 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:35:19,336 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:35:19,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:35:19,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:35:19,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 19:35:19,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 19:35:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-09-23 19:35:19,349 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-09-23 19:35:19,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:19,350 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-09-23 19:35:19,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:35:19,350 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-09-23 19:35:19,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 19:35:19,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:19,351 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:19,351 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:19,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:19,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1465268668, now seen corresponding path program 5 times [2018-09-23 19:35:19,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:19,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:19,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:19,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:19,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:19,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:19,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:19,730 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:35:19,831 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:35:19,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:19,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:19,878 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:19,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:35:19,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:35:19,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:35:19,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:35:19,882 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2018-09-23 19:35:19,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:19,987 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-09-23 19:35:19,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:35:19,990 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-09-23 19:35:19,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:19,991 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:35:19,991 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:35:19,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:35:19,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:35:19,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 19:35:19,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 19:35:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-23 19:35:19,998 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2018-09-23 19:35:19,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:19,998 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-23 19:35:19,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:35:19,998 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-23 19:35:19,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 19:35:19,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:20,000 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:20,000 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:20,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:20,000 INFO L82 PathProgramCache]: Analyzing trace with hash 980751032, now seen corresponding path program 6 times [2018-09-23 19:35:20,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:20,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:20,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:20,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:20,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:20,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:20,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:20,202 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:35:20,237 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:35:20,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:20,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:20,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:20,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:35:20,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:35:20,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:35:20,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:35:20,277 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2018-09-23 19:35:20,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:20,341 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2018-09-23 19:35:20,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:35:20,344 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2018-09-23 19:35:20,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:20,345 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:35:20,345 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:35:20,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:35:20,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:35:20,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 19:35:20,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 19:35:20,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-09-23 19:35:20,352 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2018-09-23 19:35:20,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:20,352 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-09-23 19:35:20,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:35:20,352 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-09-23 19:35:20,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 19:35:20,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:20,353 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:20,354 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:20,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:20,354 INFO L82 PathProgramCache]: Analyzing trace with hash -784229196, now seen corresponding path program 7 times [2018-09-23 19:35:20,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:20,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:20,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:20,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:20,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:20,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:20,563 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:20,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:20,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:20,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:20,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:35:20,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:35:20,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:35:20,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:35:20,644 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2018-09-23 19:35:20,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:20,716 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-09-23 19:35:20,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:35:20,720 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-09-23 19:35:20,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:20,721 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:35:20,721 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:35:20,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:35:20,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:35:20,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 19:35:20,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 19:35:20,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-09-23 19:35:20,730 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2018-09-23 19:35:20,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:20,731 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-09-23 19:35:20,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:35:20,731 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-09-23 19:35:20,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 19:35:20,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:20,732 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:20,732 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:20,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:20,733 INFO L82 PathProgramCache]: Analyzing trace with hash -418146384, now seen corresponding path program 8 times [2018-09-23 19:35:20,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:20,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:20,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:20,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:20,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:21,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:21,024 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:21,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:35:21,078 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:35:21,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:21,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:21,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:21,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 19:35:21,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:35:21,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:35:21,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:35:21,135 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2018-09-23 19:35:21,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:21,327 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2018-09-23 19:35:21,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:35:21,328 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-09-23 19:35:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:21,328 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:35:21,329 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:35:21,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:35:21,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:35:21,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 19:35:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 19:35:21,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-09-23 19:35:21,337 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2018-09-23 19:35:21,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:21,337 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-09-23 19:35:21,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:35:21,337 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-09-23 19:35:21,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 19:35:21,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:21,338 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:21,339 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:21,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:21,339 INFO L82 PathProgramCache]: Analyzing trace with hash -799882324, now seen corresponding path program 9 times [2018-09-23 19:35:21,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:21,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:21,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:21,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:21,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:21,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:21,522 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:21,533 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:21,590 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-23 19:35:21,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:21,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:21,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:21,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 19:35:21,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:35:21,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:35:21,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:35:21,628 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 13 states. [2018-09-23 19:35:21,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:21,946 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2018-09-23 19:35:21,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:35:21,947 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2018-09-23 19:35:21,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:21,948 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:35:21,948 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:35:21,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:35:21,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:35:21,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 19:35:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 19:35:21,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-09-23 19:35:21,954 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2018-09-23 19:35:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:21,955 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-09-23 19:35:21,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:35:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-09-23 19:35:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:35:21,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:21,956 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:21,956 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:21,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:21,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1719066792, now seen corresponding path program 10 times [2018-09-23 19:35:21,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:21,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:21,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:21,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:21,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:22,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:22,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:22,209 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:22,258 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:22,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:22,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:22,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:22,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 19:35:22,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:35:22,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:35:22,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:35:22,305 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2018-09-23 19:35:22,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:22,426 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-09-23 19:35:22,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:35:22,427 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-09-23 19:35:22,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:22,427 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:35:22,427 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:35:22,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:35:22,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:35:22,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 19:35:22,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 19:35:22,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-09-23 19:35:22,435 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-09-23 19:35:22,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:22,435 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-09-23 19:35:22,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:35:22,436 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-09-23 19:35:22,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 19:35:22,436 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:22,437 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:22,437 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:22,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:22,437 INFO L82 PathProgramCache]: Analyzing trace with hash 67612324, now seen corresponding path program 11 times [2018-09-23 19:35:22,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:22,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:22,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:22,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:22,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:22,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:22,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:22,621 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:35:22,732 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 19:35:22,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:22,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:22,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:22,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 19:35:22,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:35:22,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:35:22,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:35:22,817 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-09-23 19:35:22,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:22,970 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2018-09-23 19:35:22,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:35:22,971 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-09-23 19:35:22,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:22,972 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:35:22,972 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:35:22,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:35:22,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:35:22,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 19:35:22,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 19:35:22,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-09-23 19:35:22,979 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2018-09-23 19:35:22,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:22,980 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-09-23 19:35:22,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:35:22,980 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-09-23 19:35:22,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 19:35:22,981 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:22,981 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:22,981 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:22,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:22,981 INFO L82 PathProgramCache]: Analyzing trace with hash -2137199200, now seen corresponding path program 12 times [2018-09-23 19:35:22,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:22,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:22,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:22,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:22,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:23,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:23,222 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:23,231 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:35:23,374 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-23 19:35:23,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:23,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:23,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:23,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 19:35:23,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:35:23,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:35:23,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:35:23,421 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 16 states. [2018-09-23 19:35:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:23,541 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2018-09-23 19:35:23,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:35:23,541 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2018-09-23 19:35:23,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:23,542 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:35:23,542 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:35:23,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:35:23,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:35:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 19:35:23,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 19:35:23,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-09-23 19:35:23,548 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2018-09-23 19:35:23,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:23,549 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-09-23 19:35:23,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:35:23,549 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-09-23 19:35:23,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 19:35:23,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:23,550 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:23,550 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:23,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:23,550 INFO L82 PathProgramCache]: Analyzing trace with hash 752770460, now seen corresponding path program 13 times [2018-09-23 19:35:23,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:23,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:23,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:23,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:23,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:23,778 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:23,778 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:23,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:23,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:23,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:23,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 19:35:23,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:35:23,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:35:23,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:35:23,870 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 17 states. [2018-09-23 19:35:23,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:23,980 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2018-09-23 19:35:23,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:35:23,984 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-09-23 19:35:23,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:23,984 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:35:23,985 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:35:23,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:35:23,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:35:23,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 19:35:23,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 19:35:23,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-09-23 19:35:23,992 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-09-23 19:35:23,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:23,992 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-09-23 19:35:23,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:35:23,992 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-09-23 19:35:23,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 19:35:23,993 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:23,993 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:23,994 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:23,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:23,994 INFO L82 PathProgramCache]: Analyzing trace with hash -830226792, now seen corresponding path program 14 times [2018-09-23 19:35:23,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:23,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:23,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:23,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:23,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:24,492 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:24,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:24,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:24,499 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:35:24,548 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:35:24,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:24,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:24,603 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:24,603 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 19:35:24,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:35:24,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:35:24,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:35:24,604 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 18 states. [2018-09-23 19:35:24,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:24,778 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2018-09-23 19:35:24,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:35:24,781 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2018-09-23 19:35:24,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:24,781 INFO L225 Difference]: With dead ends: 63 [2018-09-23 19:35:24,781 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:35:24,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:35:24,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:35:24,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 19:35:24,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 19:35:24,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-09-23 19:35:24,790 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2018-09-23 19:35:24,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:24,790 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-09-23 19:35:24,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:35:24,790 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-09-23 19:35:24,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 19:35:24,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:24,791 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:24,791 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:24,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:24,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1672163180, now seen corresponding path program 15 times [2018-09-23 19:35:24,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:24,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:24,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:24,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:24,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:25,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:25,222 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:25,230 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:25,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-23 19:35:25,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:25,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:25,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:25,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 19:35:25,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:35:25,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:35:25,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:35:25,347 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 19 states. [2018-09-23 19:35:25,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:25,462 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2018-09-23 19:35:25,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:35:25,463 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2018-09-23 19:35:25,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:25,464 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:35:25,464 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:35:25,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:35:25,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:35:25,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 19:35:25,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 19:35:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-09-23 19:35:25,470 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2018-09-23 19:35:25,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:25,470 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-09-23 19:35:25,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:35:25,470 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-09-23 19:35:25,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 19:35:25,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:25,471 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:25,472 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:25,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:25,472 INFO L82 PathProgramCache]: Analyzing trace with hash 975786896, now seen corresponding path program 16 times [2018-09-23 19:35:25,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:25,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:25,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:25,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:25,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:26,291 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:26,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:26,291 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:26,299 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:26,335 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:26,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:26,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:26,383 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:26,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 19:35:26,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:35:26,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:35:26,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:35:26,385 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 20 states. [2018-09-23 19:35:26,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:26,469 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2018-09-23 19:35:26,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:35:26,469 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2018-09-23 19:35:26,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:26,470 INFO L225 Difference]: With dead ends: 67 [2018-09-23 19:35:26,470 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:35:26,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:35:26,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:35:26,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 19:35:26,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 19:35:26,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2018-09-23 19:35:26,477 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2018-09-23 19:35:26,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:26,477 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2018-09-23 19:35:26,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:35:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2018-09-23 19:35:26,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 19:35:26,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:26,478 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:26,478 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:26,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:26,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1259796596, now seen corresponding path program 17 times [2018-09-23 19:35:26,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:26,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:26,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:26,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:26,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:26,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:26,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:26,819 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:35:26,863 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 19:35:26,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:26,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:26,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:26,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 19:35:26,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:35:26,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:35:26,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:35:26,907 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 21 states. [2018-09-23 19:35:27,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:27,095 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2018-09-23 19:35:27,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:35:27,096 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2018-09-23 19:35:27,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:27,097 INFO L225 Difference]: With dead ends: 69 [2018-09-23 19:35:27,097 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:35:27,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:35:27,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:35:27,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 19:35:27,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 19:35:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-09-23 19:35:27,104 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2018-09-23 19:35:27,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:27,104 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-09-23 19:35:27,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:35:27,105 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-09-23 19:35:27,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 19:35:27,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:27,105 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:27,106 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:27,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:27,106 INFO L82 PathProgramCache]: Analyzing trace with hash 2123082888, now seen corresponding path program 18 times [2018-09-23 19:35:27,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:27,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:27,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:27,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:27,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:27,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:27,565 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:27,572 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:35:27,615 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-23 19:35:27,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:27,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:27,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:27,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 19:35:27,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:35:27,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:35:27,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:35:27,660 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2018-09-23 19:35:27,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:27,817 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2018-09-23 19:35:27,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:35:27,820 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2018-09-23 19:35:27,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:27,820 INFO L225 Difference]: With dead ends: 71 [2018-09-23 19:35:27,820 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:35:27,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:35:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:35:27,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 19:35:27,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 19:35:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2018-09-23 19:35:27,836 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2018-09-23 19:35:27,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:27,836 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2018-09-23 19:35:27,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:35:27,837 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2018-09-23 19:35:27,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 19:35:27,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:27,837 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:27,838 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:27,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:27,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1780023940, now seen corresponding path program 19 times [2018-09-23 19:35:27,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:27,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:27,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:27,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:27,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:28,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:28,825 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:28,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:28,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:28,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:28,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 19:35:28,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:35:28,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:35:28,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:35:28,911 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 23 states. [2018-09-23 19:35:28,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:28,986 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2018-09-23 19:35:28,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:35:28,987 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2018-09-23 19:35:28,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:28,987 INFO L225 Difference]: With dead ends: 73 [2018-09-23 19:35:28,987 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:35:28,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:35:28,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:35:28,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 19:35:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 19:35:28,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-09-23 19:35:28,992 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-09-23 19:35:28,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:28,993 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-09-23 19:35:28,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:35:28,993 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-09-23 19:35:28,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 19:35:28,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:28,994 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:28,994 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:28,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:28,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1482110592, now seen corresponding path program 20 times [2018-09-23 19:35:28,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:28,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:28,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:28,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:28,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:29,649 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:29,649 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:29,657 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:35:29,704 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:35:29,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:29,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:29,751 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:29,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 19:35:29,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:35:29,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:35:29,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:35:29,752 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 24 states. [2018-09-23 19:35:29,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:29,932 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-09-23 19:35:29,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:35:29,932 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2018-09-23 19:35:29,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:29,933 INFO L225 Difference]: With dead ends: 75 [2018-09-23 19:35:29,933 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 19:35:29,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:35:29,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 19:35:29,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 19:35:29,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 19:35:29,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-09-23 19:35:29,938 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 58 [2018-09-23 19:35:29,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:29,938 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-09-23 19:35:29,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:35:29,938 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-09-23 19:35:29,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 19:35:29,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:29,939 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:29,939 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:29,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:29,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1067269764, now seen corresponding path program 21 times [2018-09-23 19:35:29,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:29,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:29,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:29,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:29,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:30,540 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:30,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:30,552 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:30,598 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-09-23 19:35:30,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:30,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:30,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:30,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 19:35:30,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:35:30,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:35:30,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:35:30,644 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 25 states. [2018-09-23 19:35:30,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:30,694 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2018-09-23 19:35:30,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:35:30,695 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2018-09-23 19:35:30,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:30,696 INFO L225 Difference]: With dead ends: 77 [2018-09-23 19:35:30,696 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 19:35:30,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:35:30,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 19:35:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 19:35:30,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 19:35:30,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-09-23 19:35:30,701 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2018-09-23 19:35:30,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:30,701 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-09-23 19:35:30,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:35:30,701 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-09-23 19:35:30,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 19:35:30,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:30,702 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:30,702 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:30,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:30,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1837192584, now seen corresponding path program 22 times [2018-09-23 19:35:30,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:30,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:30,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:30,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:30,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:31,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:31,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:31,350 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:31,402 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:31,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:31,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:31,439 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:31,439 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 19:35:31,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:35:31,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:35:31,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:35:31,441 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 26 states. [2018-09-23 19:35:31,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:31,516 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2018-09-23 19:35:31,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:35:31,516 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-09-23 19:35:31,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:31,517 INFO L225 Difference]: With dead ends: 79 [2018-09-23 19:35:31,517 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 19:35:31,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:35:31,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 19:35:31,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 19:35:31,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 19:35:31,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-09-23 19:35:31,521 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-09-23 19:35:31,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:31,521 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-09-23 19:35:31,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:35:31,521 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-09-23 19:35:31,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 19:35:31,522 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:31,522 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:31,522 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:31,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:31,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1296319604, now seen corresponding path program 23 times [2018-09-23 19:35:31,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:31,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:31,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:31,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:31,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:32,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:32,373 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:32,382 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:35:32,436 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 19:35:32,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:32,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:32,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:32,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 19:35:32,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:35:32,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:35:32,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:35:32,482 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 27 states. [2018-09-23 19:35:32,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:32,769 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2018-09-23 19:35:32,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:35:32,769 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2018-09-23 19:35:32,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:32,770 INFO L225 Difference]: With dead ends: 81 [2018-09-23 19:35:32,770 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 19:35:32,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:35:32,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 19:35:32,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 19:35:32,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 19:35:32,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-09-23 19:35:32,774 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2018-09-23 19:35:32,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:32,775 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-09-23 19:35:32,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:35:32,775 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-09-23 19:35:32,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 19:35:32,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:32,775 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:32,775 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:32,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:32,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1829457776, now seen corresponding path program 24 times [2018-09-23 19:35:32,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:32,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:32,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:32,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:32,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:33,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:33,369 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:33,376 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:35:33,429 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-23 19:35:33,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:33,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:33,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:33,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 19:35:33,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:35:33,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:35:33,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:35:33,464 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 28 states. [2018-09-23 19:35:33,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:33,579 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2018-09-23 19:35:33,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:35:33,580 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2018-09-23 19:35:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:33,581 INFO L225 Difference]: With dead ends: 83 [2018-09-23 19:35:33,581 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 19:35:33,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:35:33,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 19:35:33,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 19:35:33,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 19:35:33,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2018-09-23 19:35:33,588 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2018-09-23 19:35:33,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:33,589 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2018-09-23 19:35:33,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:35:33,589 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2018-09-23 19:35:33,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 19:35:33,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:33,590 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:33,590 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:33,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:33,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1220834452, now seen corresponding path program 25 times [2018-09-23 19:35:33,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:33,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:33,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:33,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:33,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:34,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:34,141 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:34,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:34,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:34,240 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:34,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 19:35:34,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:35:34,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:35:34,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:35:34,241 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 29 states. [2018-09-23 19:35:34,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:34,358 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2018-09-23 19:35:34,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:35:34,362 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 68 [2018-09-23 19:35:34,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:34,362 INFO L225 Difference]: With dead ends: 85 [2018-09-23 19:35:34,362 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 19:35:34,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:35:34,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 19:35:34,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 19:35:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 19:35:34,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2018-09-23 19:35:34,367 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2018-09-23 19:35:34,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:34,367 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2018-09-23 19:35:34,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:35:34,368 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2018-09-23 19:35:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 19:35:34,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:34,368 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:34,368 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:34,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:34,368 INFO L82 PathProgramCache]: Analyzing trace with hash 910997608, now seen corresponding path program 26 times [2018-09-23 19:35:34,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:34,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:34,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:34,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:34,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:35,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:35,047 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:35,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:35:35,109 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:35:35,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:35,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:35,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:35,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 19:35:35,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:35:35,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:35:35,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:35:35,165 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 30 states. [2018-09-23 19:35:35,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:35,229 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2018-09-23 19:35:35,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:35:35,230 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2018-09-23 19:35:35,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:35,231 INFO L225 Difference]: With dead ends: 87 [2018-09-23 19:35:35,231 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 19:35:35,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:35:35,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 19:35:35,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 19:35:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 19:35:35,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-09-23 19:35:35,237 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2018-09-23 19:35:35,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:35,237 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-09-23 19:35:35,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:35:35,237 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-09-23 19:35:35,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 19:35:35,238 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:35,238 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:35,238 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:35,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:35,239 INFO L82 PathProgramCache]: Analyzing trace with hash 902207076, now seen corresponding path program 27 times [2018-09-23 19:35:35,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:35,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:35,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:35,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:35,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:35,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:35,675 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:35,683 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:35,749 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-09-23 19:35:35,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:35,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:35,783 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:35,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 19:35:35,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:35:35,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:35:35,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:35:35,784 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 31 states. [2018-09-23 19:35:35,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:35,866 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2018-09-23 19:35:35,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:35:35,866 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2018-09-23 19:35:35,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:35,867 INFO L225 Difference]: With dead ends: 89 [2018-09-23 19:35:35,867 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 19:35:35,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:35:35,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 19:35:35,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 19:35:35,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 19:35:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2018-09-23 19:35:35,873 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2018-09-23 19:35:35,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:35,873 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2018-09-23 19:35:35,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:35:35,873 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2018-09-23 19:35:35,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 19:35:35,873 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:35,874 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:35,874 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:35,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:35,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1044440416, now seen corresponding path program 28 times [2018-09-23 19:35:35,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:35,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:35,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:35,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:35,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:36,595 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:36,595 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:36,610 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:36,656 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:36,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:36,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:36,691 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:36,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 19:35:36,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:35:36,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:35:36,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:35:36,692 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 32 states. [2018-09-23 19:35:36,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:36,774 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2018-09-23 19:35:36,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:35:36,774 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 74 [2018-09-23 19:35:36,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:36,775 INFO L225 Difference]: With dead ends: 91 [2018-09-23 19:35:36,776 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 19:35:36,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:35:36,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 19:35:36,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 19:35:36,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 19:35:36,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-09-23 19:35:36,782 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-09-23 19:35:36,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:36,782 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-09-23 19:35:36,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:35:36,783 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-09-23 19:35:36,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 19:35:36,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:36,783 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:36,783 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:36,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:36,784 INFO L82 PathProgramCache]: Analyzing trace with hash 291726684, now seen corresponding path program 29 times [2018-09-23 19:35:36,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:36,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:36,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:36,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:36,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:37,332 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:37,332 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:37,340 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:35:37,439 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-23 19:35:37,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:37,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:37,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:37,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 19:35:37,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:35:37,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:35:37,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:35:37,474 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 33 states. [2018-09-23 19:35:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:37,590 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2018-09-23 19:35:37,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:35:37,590 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 76 [2018-09-23 19:35:37,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:37,591 INFO L225 Difference]: With dead ends: 93 [2018-09-23 19:35:37,591 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 19:35:37,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:35:37,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 19:35:37,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 19:35:37,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 19:35:37,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-09-23 19:35:37,596 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2018-09-23 19:35:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:37,596 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-09-23 19:35:37,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:35:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-09-23 19:35:37,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 19:35:37,597 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:37,597 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:37,597 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:37,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:37,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1511664040, now seen corresponding path program 30 times [2018-09-23 19:35:37,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:37,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:37,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:37,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:37,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:38,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:38,254 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:38,262 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:35:38,330 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-23 19:35:38,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:38,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:38,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:38,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 19:35:38,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:35:38,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:35:38,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:35:38,372 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 34 states. [2018-09-23 19:35:38,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:38,426 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2018-09-23 19:35:38,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:35:38,426 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2018-09-23 19:35:38,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:38,427 INFO L225 Difference]: With dead ends: 95 [2018-09-23 19:35:38,427 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 19:35:38,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:35:38,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 19:35:38,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 19:35:38,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 19:35:38,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2018-09-23 19:35:38,431 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2018-09-23 19:35:38,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:38,432 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2018-09-23 19:35:38,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:35:38,432 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2018-09-23 19:35:38,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 19:35:38,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:38,432 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:38,433 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:38,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:38,433 INFO L82 PathProgramCache]: Analyzing trace with hash 596637780, now seen corresponding path program 31 times [2018-09-23 19:35:38,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:38,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:38,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:38,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:38,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:38,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:38,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:38,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:39,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:39,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:39,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 19:35:39,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:35:39,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:35:39,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:35:39,100 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 35 states. [2018-09-23 19:35:39,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:39,209 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2018-09-23 19:35:39,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:35:39,210 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 80 [2018-09-23 19:35:39,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:39,211 INFO L225 Difference]: With dead ends: 97 [2018-09-23 19:35:39,211 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 19:35:39,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:35:39,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 19:35:39,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 19:35:39,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 19:35:39,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-09-23 19:35:39,216 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-09-23 19:35:39,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:39,216 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-09-23 19:35:39,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:35:39,216 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-09-23 19:35:39,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 19:35:39,217 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:39,217 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:39,217 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:39,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:39,218 INFO L82 PathProgramCache]: Analyzing trace with hash -549876912, now seen corresponding path program 32 times [2018-09-23 19:35:39,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:39,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:39,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:39,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:39,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:39,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:39,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:39,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:39,852 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:35:39,920 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:35:39,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:39,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:39,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:39,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 19:35:39,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:35:39,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:35:39,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:35:39,958 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 36 states. [2018-09-23 19:35:40,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:40,150 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2018-09-23 19:35:40,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:35:40,151 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 82 [2018-09-23 19:35:40,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:40,152 INFO L225 Difference]: With dead ends: 99 [2018-09-23 19:35:40,152 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 19:35:40,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:35:40,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 19:35:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 19:35:40,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 19:35:40,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-09-23 19:35:40,156 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 82 [2018-09-23 19:35:40,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:40,156 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-09-23 19:35:40,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:35:40,156 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-09-23 19:35:40,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 19:35:40,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:40,157 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:40,157 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:40,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:40,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1456099148, now seen corresponding path program 33 times [2018-09-23 19:35:40,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:40,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:40,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:40,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:40,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:41,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:41,567 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:41,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:41,650 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-09-23 19:35:41,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:41,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:41,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:41,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 19:35:41,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:35:41,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:35:41,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:35:41,708 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 37 states. [2018-09-23 19:35:41,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:41,868 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2018-09-23 19:35:41,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:35:41,868 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 84 [2018-09-23 19:35:41,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:41,869 INFO L225 Difference]: With dead ends: 101 [2018-09-23 19:35:41,870 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 19:35:41,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:35:41,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 19:35:41,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-23 19:35:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 19:35:41,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-09-23 19:35:41,876 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 84 [2018-09-23 19:35:41,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:41,876 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-09-23 19:35:41,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:35:41,876 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-09-23 19:35:41,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 19:35:41,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:41,877 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:41,877 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:41,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:41,878 INFO L82 PathProgramCache]: Analyzing trace with hash 758776904, now seen corresponding path program 34 times [2018-09-23 19:35:41,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:41,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:41,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:41,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:41,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:43,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:43,240 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:43,247 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:43,307 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:43,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:43,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:43,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:43,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 19:35:43,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:35:43,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:35:43,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:35:43,347 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 38 states. [2018-09-23 19:35:43,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:43,487 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2018-09-23 19:35:43,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:35:43,488 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 86 [2018-09-23 19:35:43,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:43,489 INFO L225 Difference]: With dead ends: 103 [2018-09-23 19:35:43,489 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 19:35:43,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:35:43,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 19:35:43,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 19:35:43,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 19:35:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2018-09-23 19:35:43,495 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 86 [2018-09-23 19:35:43,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:43,495 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2018-09-23 19:35:43,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:35:43,495 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2018-09-23 19:35:43,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 19:35:43,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:43,496 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:43,496 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:43,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:43,497 INFO L82 PathProgramCache]: Analyzing trace with hash 646998596, now seen corresponding path program 35 times [2018-09-23 19:35:43,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:43,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:43,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:43,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:43,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:44,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:44,258 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:44,266 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:35:44,367 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 19:35:44,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:44,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:44,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:44,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 19:35:44,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:35:44,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:35:44,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:35:44,418 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 39 states. [2018-09-23 19:35:45,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:45,508 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2018-09-23 19:35:45,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:35:45,508 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 88 [2018-09-23 19:35:45,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:45,509 INFO L225 Difference]: With dead ends: 105 [2018-09-23 19:35:45,509 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 19:35:45,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:35:45,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 19:35:45,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 19:35:45,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 19:35:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-23 19:35:45,515 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 88 [2018-09-23 19:35:45,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:45,516 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-23 19:35:45,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:35:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-23 19:35:45,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 19:35:45,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:45,517 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:45,517 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:45,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:45,517 INFO L82 PathProgramCache]: Analyzing trace with hash 602227008, now seen corresponding path program 36 times [2018-09-23 19:35:45,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:45,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:45,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:45,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:45,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:46,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:46,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:46,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:46,727 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:35:46,813 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-23 19:35:46,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:46,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:46,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:46,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 19:35:46,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:35:46,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:35:46,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:35:46,865 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 40 states. [2018-09-23 19:35:46,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:46,965 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2018-09-23 19:35:46,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:35:46,965 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 90 [2018-09-23 19:35:46,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:46,966 INFO L225 Difference]: With dead ends: 107 [2018-09-23 19:35:46,967 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 19:35:46,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:35:46,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 19:35:46,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 19:35:46,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 19:35:46,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2018-09-23 19:35:46,972 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 90 [2018-09-23 19:35:46,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:46,972 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2018-09-23 19:35:46,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:35:46,972 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2018-09-23 19:35:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 19:35:46,973 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:46,973 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:46,973 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:46,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:46,973 INFO L82 PathProgramCache]: Analyzing trace with hash 526403900, now seen corresponding path program 37 times [2018-09-23 19:35:46,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:46,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:46,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:46,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:46,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:47,670 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:47,670 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:47,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:47,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:47,780 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:47,780 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 19:35:47,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:35:47,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:35:47,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:35:47,781 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 41 states. [2018-09-23 19:35:47,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:47,851 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2018-09-23 19:35:47,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:35:47,851 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 92 [2018-09-23 19:35:47,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:47,852 INFO L225 Difference]: With dead ends: 109 [2018-09-23 19:35:47,852 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 19:35:47,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:35:47,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 19:35:47,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 19:35:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 19:35:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-09-23 19:35:47,859 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-09-23 19:35:47,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:47,860 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-09-23 19:35:47,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:35:47,860 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-09-23 19:35:47,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 19:35:47,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:47,860 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:47,861 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:47,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:47,861 INFO L82 PathProgramCache]: Analyzing trace with hash 674841144, now seen corresponding path program 38 times [2018-09-23 19:35:47,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:47,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:47,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:47,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:47,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:48,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:48,684 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:48,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:35:48,760 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:35:48,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:48,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:48,801 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:48,801 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 19:35:48,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:35:48,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:35:48,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:35:48,803 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 42 states. [2018-09-23 19:35:48,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:48,900 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2018-09-23 19:35:48,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:35:48,900 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 94 [2018-09-23 19:35:48,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:48,901 INFO L225 Difference]: With dead ends: 111 [2018-09-23 19:35:48,901 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 19:35:48,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:35:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 19:35:48,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 19:35:48,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 19:35:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-09-23 19:35:48,906 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 94 [2018-09-23 19:35:48,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:48,907 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-09-23 19:35:48,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:35:48,907 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-09-23 19:35:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 19:35:48,907 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:48,907 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:48,908 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:48,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:48,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1589111860, now seen corresponding path program 39 times [2018-09-23 19:35:48,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:48,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:48,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:48,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:48,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:50,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:50,482 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:50,489 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:50,677 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-09-23 19:35:50,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:50,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:50,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:50,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 19:35:50,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:35:50,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:35:50,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:35:50,731 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 43 states. [2018-09-23 19:35:50,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:50,903 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2018-09-23 19:35:50,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:35:50,906 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 96 [2018-09-23 19:35:50,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:50,907 INFO L225 Difference]: With dead ends: 113 [2018-09-23 19:35:50,907 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 19:35:50,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:35:50,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 19:35:50,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 19:35:50,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 19:35:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2018-09-23 19:35:50,915 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2018-09-23 19:35:50,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:50,915 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2018-09-23 19:35:50,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:35:50,915 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2018-09-23 19:35:50,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 19:35:50,916 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:50,916 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:50,916 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:50,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:50,917 INFO L82 PathProgramCache]: Analyzing trace with hash -265025744, now seen corresponding path program 40 times [2018-09-23 19:35:50,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:50,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:50,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:50,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:50,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:52,511 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:52,511 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:52,519 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:52,583 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:52,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:52,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:52,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:52,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 19:35:52,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:35:52,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:35:52,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:35:52,641 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 44 states. [2018-09-23 19:35:53,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:53,896 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2018-09-23 19:35:53,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:35:53,897 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 98 [2018-09-23 19:35:53,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:53,897 INFO L225 Difference]: With dead ends: 115 [2018-09-23 19:35:53,897 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 19:35:53,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:35:53,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 19:35:53,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 19:35:53,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 19:35:53,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-23 19:35:53,904 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-09-23 19:35:53,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:53,904 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-23 19:35:53,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:35:53,905 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-23 19:35:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 19:35:53,905 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:53,905 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:53,906 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:53,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:53,906 INFO L82 PathProgramCache]: Analyzing trace with hash 320164652, now seen corresponding path program 41 times [2018-09-23 19:35:53,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:53,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:53,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:53,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:53,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:55,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:55,245 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:55,255 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:35:55,348 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-23 19:35:55,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:55,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:55,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:55,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 19:35:55,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:35:55,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:35:55,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:35:55,392 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 45 states. [2018-09-23 19:35:55,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:55,976 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2018-09-23 19:35:55,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:35:55,977 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 100 [2018-09-23 19:35:55,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:55,978 INFO L225 Difference]: With dead ends: 117 [2018-09-23 19:35:55,979 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 19:35:55,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:35:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 19:35:55,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 19:35:55,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 19:35:55,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-09-23 19:35:55,985 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 100 [2018-09-23 19:35:55,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:55,985 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-09-23 19:35:55,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:35:55,986 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-09-23 19:35:55,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 19:35:55,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:55,986 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:55,987 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:55,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:55,987 INFO L82 PathProgramCache]: Analyzing trace with hash 47419432, now seen corresponding path program 42 times [2018-09-23 19:35:55,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:55,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:55,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:55,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:55,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:57,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:57,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:57,220 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:35:57,323 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-09-23 19:35:57,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:57,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:57,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:57,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 19:35:57,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:35:57,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:35:57,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:35:57,378 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 46 states. [2018-09-23 19:35:57,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:57,514 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2018-09-23 19:35:57,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:35:57,514 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 102 [2018-09-23 19:35:57,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:57,516 INFO L225 Difference]: With dead ends: 119 [2018-09-23 19:35:57,516 INFO L226 Difference]: Without dead ends: 105 [2018-09-23 19:35:57,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:35:57,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-23 19:35:57,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-23 19:35:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 19:35:57,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-09-23 19:35:57,522 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 102 [2018-09-23 19:35:57,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:57,522 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-09-23 19:35:57,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:35:57,523 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-09-23 19:35:57,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 19:35:57,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:57,523 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:57,523 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:57,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:57,524 INFO L82 PathProgramCache]: Analyzing trace with hash -67731932, now seen corresponding path program 43 times [2018-09-23 19:35:57,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:57,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:57,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:57,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:57,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:58,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:58,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:58,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:58,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:35:58,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:58,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 19:35:58,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:35:58,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:35:58,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:35:58,570 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-09-23 19:35:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:58,891 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2018-09-23 19:35:58,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:35:58,892 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-09-23 19:35:58,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:58,893 INFO L225 Difference]: With dead ends: 121 [2018-09-23 19:35:58,893 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 19:35:58,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:35:58,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 19:35:58,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-23 19:35:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 19:35:58,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2018-09-23 19:35:58,900 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 104 [2018-09-23 19:35:58,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:58,901 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2018-09-23 19:35:58,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:35:58,901 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2018-09-23 19:35:58,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 19:35:58,901 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:58,902 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:35:58,902 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:58,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:58,902 INFO L82 PathProgramCache]: Analyzing trace with hash 940956960, now seen corresponding path program 44 times [2018-09-23 19:35:58,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:58,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:58,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:58,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:58,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:58,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:00,621 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:00,621 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:00,630 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:00,696 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:00,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:00,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:00,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:00,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 19:36:00,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:36:00,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:36:00,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:36:00,742 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 48 states. [2018-09-23 19:36:00,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:00,976 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2018-09-23 19:36:00,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:36:00,976 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 106 [2018-09-23 19:36:00,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:00,977 INFO L225 Difference]: With dead ends: 123 [2018-09-23 19:36:00,977 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 19:36:00,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:36:00,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 19:36:00,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 19:36:00,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 19:36:00,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-09-23 19:36:00,984 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 106 [2018-09-23 19:36:00,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:00,984 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-09-23 19:36:00,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:36:00,984 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-09-23 19:36:00,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 19:36:00,985 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:00,985 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:00,985 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:00,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:00,986 INFO L82 PathProgramCache]: Analyzing trace with hash -371626724, now seen corresponding path program 45 times [2018-09-23 19:36:00,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:00,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:00,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:00,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:00,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:02,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:02,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:02,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:02,343 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-09-23 19:36:02,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:02,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:02,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:02,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 19:36:02,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:36:02,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:36:02,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:36:02,386 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 49 states. [2018-09-23 19:36:02,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:02,617 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2018-09-23 19:36:02,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:36:02,617 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 108 [2018-09-23 19:36:02,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:02,619 INFO L225 Difference]: With dead ends: 125 [2018-09-23 19:36:02,619 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 19:36:02,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:36:02,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 19:36:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-23 19:36:02,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 19:36:02,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2018-09-23 19:36:02,627 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 108 [2018-09-23 19:36:02,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:02,627 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2018-09-23 19:36:02,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:36:02,628 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2018-09-23 19:36:02,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 19:36:02,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:02,629 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:02,629 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:02,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:02,629 INFO L82 PathProgramCache]: Analyzing trace with hash 955837976, now seen corresponding path program 46 times [2018-09-23 19:36:02,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:02,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:02,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:02,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:02,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:04,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:04,008 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:04,015 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:04,099 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:04,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:04,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:04,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:04,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 19:36:04,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:36:04,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:36:04,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:36:04,148 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 50 states. [2018-09-23 19:36:04,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:04,283 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2018-09-23 19:36:04,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:36:04,292 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 110 [2018-09-23 19:36:04,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:04,293 INFO L225 Difference]: With dead ends: 127 [2018-09-23 19:36:04,293 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 19:36:04,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:36:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 19:36:04,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-23 19:36:04,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 19:36:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-09-23 19:36:04,300 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-09-23 19:36:04,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:04,300 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-09-23 19:36:04,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:36:04,300 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-09-23 19:36:04,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 19:36:04,301 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:04,301 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:04,301 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:04,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:04,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1044127764, now seen corresponding path program 47 times [2018-09-23 19:36:04,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:04,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:04,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:04,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:04,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:05,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:05,494 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:05,501 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:05,626 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-23 19:36:05,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:05,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:05,683 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:05,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 19:36:05,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 19:36:05,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 19:36:05,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:36:05,684 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 51 states. [2018-09-23 19:36:06,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:06,033 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2018-09-23 19:36:06,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:36:06,036 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 112 [2018-09-23 19:36:06,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:06,037 INFO L225 Difference]: With dead ends: 129 [2018-09-23 19:36:06,037 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 19:36:06,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:36:06,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 19:36:06,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-23 19:36:06,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 19:36:06,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-23 19:36:06,044 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 112 [2018-09-23 19:36:06,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:06,045 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-23 19:36:06,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 19:36:06,045 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-23 19:36:06,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 19:36:06,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:06,046 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:06,046 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:06,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:06,046 INFO L82 PathProgramCache]: Analyzing trace with hash -8731888, now seen corresponding path program 48 times [2018-09-23 19:36:06,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:06,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:06,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:06,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:06,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:07,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:07,539 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:07,547 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:07,675 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-09-23 19:36:07,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:07,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:07,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:07,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 19:36:07,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:36:07,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:36:07,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:36:07,720 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 52 states. [2018-09-23 19:36:07,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:07,903 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2018-09-23 19:36:07,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:36:07,904 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 114 [2018-09-23 19:36:07,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:07,905 INFO L225 Difference]: With dead ends: 131 [2018-09-23 19:36:07,905 INFO L226 Difference]: Without dead ends: 117 [2018-09-23 19:36:07,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:36:07,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-23 19:36:07,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-23 19:36:07,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-23 19:36:07,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2018-09-23 19:36:07,913 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 114 [2018-09-23 19:36:07,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:07,913 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2018-09-23 19:36:07,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:36:07,913 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2018-09-23 19:36:07,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-23 19:36:07,914 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:07,914 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:07,914 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:07,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:07,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1805424396, now seen corresponding path program 49 times [2018-09-23 19:36:07,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:07,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:07,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:07,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:07,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:10,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:10,296 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:10,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:10,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:10,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:10,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 19:36:10,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:36:10,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:36:10,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:36:10,444 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand 53 states. [2018-09-23 19:36:10,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:10,689 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2018-09-23 19:36:10,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:36:10,689 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 116 [2018-09-23 19:36:10,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:10,691 INFO L225 Difference]: With dead ends: 133 [2018-09-23 19:36:10,691 INFO L226 Difference]: Without dead ends: 119 [2018-09-23 19:36:10,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:36:10,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-23 19:36:10,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-23 19:36:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 19:36:10,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-09-23 19:36:10,698 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-09-23 19:36:10,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:10,698 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-09-23 19:36:10,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:36:10,699 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-09-23 19:36:10,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-23 19:36:10,699 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:10,699 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:10,700 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:10,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:10,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1452891144, now seen corresponding path program 50 times [2018-09-23 19:36:10,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:10,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:10,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:10,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:10,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:12,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:12,024 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:12,031 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:12,109 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:12,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:12,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:12,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:12,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 19:36:12,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:36:12,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:36:12,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:36:12,175 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 54 states. [2018-09-23 19:36:12,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:12,461 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-09-23 19:36:12,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:36:12,462 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 118 [2018-09-23 19:36:12,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:12,463 INFO L225 Difference]: With dead ends: 135 [2018-09-23 19:36:12,463 INFO L226 Difference]: Without dead ends: 121 [2018-09-23 19:36:12,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:36:12,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-23 19:36:12,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-23 19:36:12,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-23 19:36:12,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-09-23 19:36:12,469 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 118 [2018-09-23 19:36:12,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:12,469 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-09-23 19:36:12,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:36:12,469 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-09-23 19:36:12,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-23 19:36:12,470 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:12,470 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:12,470 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:12,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:12,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1970852356, now seen corresponding path program 51 times [2018-09-23 19:36:12,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:12,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:12,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:12,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:12,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:13,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:13,931 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:13,942 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:14,093 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-09-23 19:36:14,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:14,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:14,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:14,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 19:36:14,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 19:36:14,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 19:36:14,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:36:14,155 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 55 states. [2018-09-23 19:36:14,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:14,988 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2018-09-23 19:36:14,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:36:14,989 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 120 [2018-09-23 19:36:14,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:14,990 INFO L225 Difference]: With dead ends: 137 [2018-09-23 19:36:14,990 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 19:36:14,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:36:14,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 19:36:14,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-23 19:36:14,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-23 19:36:14,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2018-09-23 19:36:14,997 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 120 [2018-09-23 19:36:14,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:14,998 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2018-09-23 19:36:14,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 19:36:14,998 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2018-09-23 19:36:14,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-23 19:36:14,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:14,999 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:14,999 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:14,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:14,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1515370752, now seen corresponding path program 52 times [2018-09-23 19:36:14,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:15,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:15,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:15,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:15,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2880 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:16,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:16,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:16,144 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:16,222 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:16,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:16,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2880 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:16,282 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:16,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 19:36:16,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:36:16,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:36:16,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:36:16,284 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 56 states. [2018-09-23 19:36:16,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:16,390 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2018-09-23 19:36:16,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:36:16,390 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 122 [2018-09-23 19:36:16,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:16,391 INFO L225 Difference]: With dead ends: 139 [2018-09-23 19:36:16,391 INFO L226 Difference]: Without dead ends: 125 [2018-09-23 19:36:16,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:36:16,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-23 19:36:16,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-23 19:36:16,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-23 19:36:16,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2018-09-23 19:36:16,397 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 122 [2018-09-23 19:36:16,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:16,397 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2018-09-23 19:36:16,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:36:16,397 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2018-09-23 19:36:16,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-23 19:36:16,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:16,398 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:16,398 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:16,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:16,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1884213500, now seen corresponding path program 53 times [2018-09-23 19:36:16,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:16,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:16,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:16,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:16,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:18,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:18,033 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:18,049 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:18,241 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-23 19:36:18,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:18,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:18,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:18,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 19:36:18,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 19:36:18,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 19:36:18,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:36:18,288 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 57 states. [2018-09-23 19:36:18,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:18,456 INFO L93 Difference]: Finished difference Result 141 states and 145 transitions. [2018-09-23 19:36:18,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:36:18,456 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 124 [2018-09-23 19:36:18,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:18,457 INFO L225 Difference]: With dead ends: 141 [2018-09-23 19:36:18,457 INFO L226 Difference]: Without dead ends: 127 [2018-09-23 19:36:18,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:36:18,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-23 19:36:18,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-23 19:36:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-23 19:36:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-09-23 19:36:18,463 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 124 [2018-09-23 19:36:18,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:18,463 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-09-23 19:36:18,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 19:36:18,464 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-09-23 19:36:18,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-23 19:36:18,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:18,464 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:18,464 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:18,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:18,465 INFO L82 PathProgramCache]: Analyzing trace with hash -140191240, now seen corresponding path program 54 times [2018-09-23 19:36:18,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:18,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:18,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:18,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:18,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3098 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:19,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:19,736 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:19,744 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:19,884 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-09-23 19:36:19,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:19,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3098 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:19,944 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:19,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 19:36:19,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:36:19,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:36:19,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:36:19,946 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 58 states. [2018-09-23 19:36:20,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:20,215 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2018-09-23 19:36:20,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:36:20,215 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 126 [2018-09-23 19:36:20,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:20,216 INFO L225 Difference]: With dead ends: 143 [2018-09-23 19:36:20,216 INFO L226 Difference]: Without dead ends: 129 [2018-09-23 19:36:20,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:36:20,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-23 19:36:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-23 19:36:20,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-23 19:36:20,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-09-23 19:36:20,223 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 126 [2018-09-23 19:36:20,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:20,223 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-09-23 19:36:20,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:36:20,223 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-09-23 19:36:20,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-23 19:36:20,224 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:20,224 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:20,224 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:20,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:20,225 INFO L82 PathProgramCache]: Analyzing trace with hash 27038708, now seen corresponding path program 55 times [2018-09-23 19:36:20,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:20,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:20,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:20,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:20,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:21,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:21,450 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:21,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:21,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:21,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:21,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 19:36:21,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:36:21,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:36:21,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:36:21,607 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-09-23 19:36:21,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:21,777 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2018-09-23 19:36:21,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:36:21,778 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-09-23 19:36:21,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:21,779 INFO L225 Difference]: With dead ends: 145 [2018-09-23 19:36:21,779 INFO L226 Difference]: Without dead ends: 131 [2018-09-23 19:36:21,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:36:21,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-23 19:36:21,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-23 19:36:21,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-23 19:36:21,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-09-23 19:36:21,786 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-09-23 19:36:21,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:21,786 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-09-23 19:36:21,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:36:21,786 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-09-23 19:36:21,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-23 19:36:21,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:21,787 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:21,788 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:21,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:21,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1821228784, now seen corresponding path program 56 times [2018-09-23 19:36:21,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:21,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:21,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:21,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:21,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:23,479 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:23,479 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:23,487 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:23,574 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:23,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:23,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:23,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:23,637 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 19:36:23,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:36:23,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:36:23,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:36:23,639 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 60 states. [2018-09-23 19:36:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:23,934 INFO L93 Difference]: Finished difference Result 147 states and 151 transitions. [2018-09-23 19:36:23,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:36:23,934 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 130 [2018-09-23 19:36:23,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:23,935 INFO L225 Difference]: With dead ends: 147 [2018-09-23 19:36:23,935 INFO L226 Difference]: Without dead ends: 133 [2018-09-23 19:36:23,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:36:23,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-23 19:36:23,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-23 19:36:23,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-23 19:36:23,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-09-23 19:36:23,941 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 130 [2018-09-23 19:36:23,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:23,941 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-09-23 19:36:23,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:36:23,942 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-09-23 19:36:23,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-23 19:36:23,942 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:23,942 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:23,943 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:23,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:23,943 INFO L82 PathProgramCache]: Analyzing trace with hash -538961172, now seen corresponding path program 57 times [2018-09-23 19:36:23,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:23,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:23,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:23,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:23,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:25,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:25,291 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:25,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:25,454 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-09-23 19:36:25,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:25,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:25,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:25,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 19:36:25,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 19:36:25,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 19:36:25,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:36:25,501 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 61 states. [2018-09-23 19:36:25,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:25,606 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2018-09-23 19:36:25,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:36:25,606 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 132 [2018-09-23 19:36:25,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:25,607 INFO L225 Difference]: With dead ends: 149 [2018-09-23 19:36:25,607 INFO L226 Difference]: Without dead ends: 135 [2018-09-23 19:36:25,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:36:25,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-23 19:36:25,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-23 19:36:25,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-23 19:36:25,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2018-09-23 19:36:25,613 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 132 [2018-09-23 19:36:25,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:25,613 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2018-09-23 19:36:25,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 19:36:25,613 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2018-09-23 19:36:25,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-23 19:36:25,614 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:25,614 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:25,614 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:25,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:25,615 INFO L82 PathProgramCache]: Analyzing trace with hash -938776600, now seen corresponding path program 58 times [2018-09-23 19:36:25,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:25,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:25,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:25,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:25,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3558 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:27,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:27,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:27,067 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:27,154 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:27,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:27,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3558 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:27,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:27,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 19:36:27,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 19:36:27,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 19:36:27,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:36:27,207 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 62 states. [2018-09-23 19:36:27,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:27,455 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2018-09-23 19:36:27,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:36:27,455 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 134 [2018-09-23 19:36:27,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:27,456 INFO L225 Difference]: With dead ends: 151 [2018-09-23 19:36:27,456 INFO L226 Difference]: Without dead ends: 137 [2018-09-23 19:36:27,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:36:27,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-23 19:36:27,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-23 19:36:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-23 19:36:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-09-23 19:36:27,461 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-09-23 19:36:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:27,461 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-09-23 19:36:27,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 19:36:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-09-23 19:36:27,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-23 19:36:27,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:27,462 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:27,462 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:27,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:27,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1385653732, now seen corresponding path program 59 times [2018-09-23 19:36:27,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:27,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:27,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:27,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:27,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3678 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:28,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:28,868 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:28,877 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:29,021 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-23 19:36:29,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:29,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3678 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:29,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:29,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-23 19:36:29,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 19:36:29,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 19:36:29,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:36:29,085 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 63 states. [2018-09-23 19:36:29,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:29,206 INFO L93 Difference]: Finished difference Result 153 states and 157 transitions. [2018-09-23 19:36:29,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:36:29,207 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 136 [2018-09-23 19:36:29,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:29,208 INFO L225 Difference]: With dead ends: 153 [2018-09-23 19:36:29,208 INFO L226 Difference]: Without dead ends: 139 [2018-09-23 19:36:29,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:36:29,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-23 19:36:29,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-23 19:36:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-23 19:36:29,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-09-23 19:36:29,216 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 136 [2018-09-23 19:36:29,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:29,216 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-09-23 19:36:29,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 19:36:29,217 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-09-23 19:36:29,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-23 19:36:29,217 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:29,217 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:29,218 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:29,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:29,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1780208864, now seen corresponding path program 60 times [2018-09-23 19:36:29,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:29,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:29,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:29,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:29,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3800 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:30,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:30,733 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:30,742 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:30,908 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-09-23 19:36:30,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:30,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3800 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:30,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:30,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 19:36:30,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 19:36:30,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 19:36:30,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:36:30,964 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 64 states. [2018-09-23 19:36:31,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:31,095 INFO L93 Difference]: Finished difference Result 155 states and 159 transitions. [2018-09-23 19:36:31,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 19:36:31,096 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 138 [2018-09-23 19:36:31,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:31,097 INFO L225 Difference]: With dead ends: 155 [2018-09-23 19:36:31,097 INFO L226 Difference]: Without dead ends: 141 [2018-09-23 19:36:31,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:36:31,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-23 19:36:31,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-23 19:36:31,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-23 19:36:31,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2018-09-23 19:36:31,103 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 138 [2018-09-23 19:36:31,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:31,104 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2018-09-23 19:36:31,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 19:36:31,104 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2018-09-23 19:36:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-23 19:36:31,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:31,105 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:31,105 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:31,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:31,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1304398628, now seen corresponding path program 61 times [2018-09-23 19:36:31,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:31,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:31,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:31,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:31,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:32,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:32,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:32,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:33,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:33,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:33,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:33,149 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 19:36:33,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 19:36:33,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 19:36:33,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:36:33,150 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 65 states. [2018-09-23 19:36:33,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:33,367 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2018-09-23 19:36:33,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:36:33,367 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 140 [2018-09-23 19:36:33,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:33,368 INFO L225 Difference]: With dead ends: 157 [2018-09-23 19:36:33,368 INFO L226 Difference]: Without dead ends: 143 [2018-09-23 19:36:33,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:36:33,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-23 19:36:33,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-23 19:36:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-23 19:36:33,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-09-23 19:36:33,373 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-09-23 19:36:33,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:33,373 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-09-23 19:36:33,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 19:36:33,373 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-09-23 19:36:33,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-23 19:36:33,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:33,374 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:33,374 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:33,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:33,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2084764200, now seen corresponding path program 62 times [2018-09-23 19:36:33,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:33,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:33,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:33,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:33,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:34,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:34,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:34,950 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:35,037 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:35,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:35,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:35,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:35,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-23 19:36:35,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 19:36:35,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 19:36:35,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:36:35,086 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 66 states. [2018-09-23 19:36:35,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:35,679 INFO L93 Difference]: Finished difference Result 159 states and 163 transitions. [2018-09-23 19:36:35,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 19:36:35,679 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 142 [2018-09-23 19:36:35,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:35,680 INFO L225 Difference]: With dead ends: 159 [2018-09-23 19:36:35,681 INFO L226 Difference]: Without dead ends: 145 [2018-09-23 19:36:35,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:36:35,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-23 19:36:35,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-23 19:36:35,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-23 19:36:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-09-23 19:36:35,690 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 142 [2018-09-23 19:36:35,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:35,691 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-09-23 19:36:35,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 19:36:35,691 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-09-23 19:36:35,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-23 19:36:35,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:35,692 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:35,692 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:35,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:35,693 INFO L82 PathProgramCache]: Analyzing trace with hash -396802092, now seen corresponding path program 63 times [2018-09-23 19:36:35,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:35,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:35,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:35,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:35,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4178 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:37,881 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:37,881 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:37,889 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:38,064 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-09-23 19:36:38,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:38,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4178 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:38,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:38,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 19:36:38,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 19:36:38,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 19:36:38,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:36:38,116 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 67 states. [2018-09-23 19:36:38,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:38,324 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2018-09-23 19:36:38,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:36:38,325 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 144 [2018-09-23 19:36:38,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:38,325 INFO L225 Difference]: With dead ends: 161 [2018-09-23 19:36:38,326 INFO L226 Difference]: Without dead ends: 147 [2018-09-23 19:36:38,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:36:38,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-23 19:36:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-23 19:36:38,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-23 19:36:38,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2018-09-23 19:36:38,333 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 144 [2018-09-23 19:36:38,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:38,333 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2018-09-23 19:36:38,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 19:36:38,333 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2018-09-23 19:36:38,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-23 19:36:38,334 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:38,334 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:38,334 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:38,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:38,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1762854192, now seen corresponding path program 64 times [2018-09-23 19:36:38,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:38,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:38,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:38,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:38,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4308 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:40,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:40,010 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:40,018 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:40,114 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:40,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:40,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4308 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:40,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:40,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 19:36:40,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 19:36:40,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 19:36:40,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:36:40,182 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 68 states. [2018-09-23 19:36:40,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:40,323 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2018-09-23 19:36:40,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 19:36:40,324 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 146 [2018-09-23 19:36:40,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:40,324 INFO L225 Difference]: With dead ends: 163 [2018-09-23 19:36:40,325 INFO L226 Difference]: Without dead ends: 149 [2018-09-23 19:36:40,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:36:40,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-23 19:36:40,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-23 19:36:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-23 19:36:40,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-09-23 19:36:40,332 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-09-23 19:36:40,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:40,332 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-09-23 19:36:40,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 19:36:40,332 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-09-23 19:36:40,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-23 19:36:40,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:40,333 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:40,333 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:40,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:40,334 INFO L82 PathProgramCache]: Analyzing trace with hash -278929716, now seen corresponding path program 65 times [2018-09-23 19:36:40,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:40,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:40,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:40,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:40,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4440 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:42,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:42,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:42,125 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:42,302 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-23 19:36:42,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:42,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4440 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:42,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:42,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-23 19:36:42,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 19:36:42,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 19:36:42,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:36:42,368 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 69 states. [2018-09-23 19:36:42,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:42,652 INFO L93 Difference]: Finished difference Result 165 states and 169 transitions. [2018-09-23 19:36:42,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:36:42,652 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 148 [2018-09-23 19:36:42,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:42,653 INFO L225 Difference]: With dead ends: 165 [2018-09-23 19:36:42,653 INFO L226 Difference]: Without dead ends: 151 [2018-09-23 19:36:42,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:36:42,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-23 19:36:42,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-23 19:36:42,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-23 19:36:42,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-09-23 19:36:42,661 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 148 [2018-09-23 19:36:42,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:42,661 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-09-23 19:36:42,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 19:36:42,662 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-09-23 19:36:42,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-23 19:36:42,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:42,662 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:42,663 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:42,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:42,663 INFO L82 PathProgramCache]: Analyzing trace with hash -156650552, now seen corresponding path program 66 times [2018-09-23 19:36:42,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:42,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:42,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:42,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:42,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:44,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:44,457 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:44,465 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:44,646 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-09-23 19:36:44,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:44,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:44,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:44,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:44,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 19:36:44,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 19:36:44,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 19:36:44,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:36:44,706 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 70 states. [2018-09-23 19:36:44,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:44,907 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2018-09-23 19:36:44,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 19:36:44,908 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 150 [2018-09-23 19:36:44,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:44,909 INFO L225 Difference]: With dead ends: 167 [2018-09-23 19:36:44,909 INFO L226 Difference]: Without dead ends: 153 [2018-09-23 19:36:44,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:36:44,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-23 19:36:44,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-23 19:36:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-23 19:36:44,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2018-09-23 19:36:44,914 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 150 [2018-09-23 19:36:44,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:44,914 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2018-09-23 19:36:44,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 19:36:44,914 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2018-09-23 19:36:44,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-23 19:36:44,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:44,915 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:44,915 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:44,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:44,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1389509060, now seen corresponding path program 67 times [2018-09-23 19:36:44,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:44,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:44,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:44,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:44,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:46,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:46,892 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:46,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:46,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:47,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:47,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:47,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 19:36:47,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 19:36:47,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 19:36:47,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:36:47,052 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand 71 states. [2018-09-23 19:36:47,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:47,265 INFO L93 Difference]: Finished difference Result 169 states and 173 transitions. [2018-09-23 19:36:47,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:36:47,266 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 152 [2018-09-23 19:36:47,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:47,267 INFO L225 Difference]: With dead ends: 169 [2018-09-23 19:36:47,267 INFO L226 Difference]: Without dead ends: 155 [2018-09-23 19:36:47,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:36:47,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-23 19:36:47,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-23 19:36:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-23 19:36:47,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-09-23 19:36:47,273 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-09-23 19:36:47,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:47,273 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-09-23 19:36:47,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 19:36:47,273 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-09-23 19:36:47,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-23 19:36:47,274 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:47,274 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:47,274 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:47,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:47,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1190211776, now seen corresponding path program 68 times [2018-09-23 19:36:47,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:47,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:47,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:47,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:47,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4848 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:49,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:49,326 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:49,333 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:49,426 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:49,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:49,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4848 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:49,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:49,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-23 19:36:49,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 19:36:49,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 19:36:49,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:36:49,494 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 72 states. [2018-09-23 19:36:50,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:50,103 INFO L93 Difference]: Finished difference Result 171 states and 175 transitions. [2018-09-23 19:36:50,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 19:36:50,103 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 154 [2018-09-23 19:36:50,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:50,104 INFO L225 Difference]: With dead ends: 171 [2018-09-23 19:36:50,104 INFO L226 Difference]: Without dead ends: 157 [2018-09-23 19:36:50,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:36:50,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-23 19:36:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-23 19:36:50,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-23 19:36:50,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-09-23 19:36:50,109 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 154 [2018-09-23 19:36:50,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:50,109 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-09-23 19:36:50,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 19:36:50,110 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-09-23 19:36:50,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-23 19:36:50,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:50,110 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:50,110 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:50,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:50,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1355917124, now seen corresponding path program 69 times [2018-09-23 19:36:50,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:50,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:50,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:50,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:50,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4988 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:52,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:52,123 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:52,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:52,333 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-09-23 19:36:52,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:52,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4988 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:52,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:52,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-23 19:36:52,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 19:36:52,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 19:36:52,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:36:52,385 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 73 states. [2018-09-23 19:36:52,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:52,521 INFO L93 Difference]: Finished difference Result 173 states and 177 transitions. [2018-09-23 19:36:52,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 19:36:52,522 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 156 [2018-09-23 19:36:52,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:52,523 INFO L225 Difference]: With dead ends: 173 [2018-09-23 19:36:52,523 INFO L226 Difference]: Without dead ends: 159 [2018-09-23 19:36:52,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:36:52,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-23 19:36:52,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-23 19:36:52,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-23 19:36:52,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2018-09-23 19:36:52,531 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 156 [2018-09-23 19:36:52,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:52,531 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2018-09-23 19:36:52,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 19:36:52,531 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2018-09-23 19:36:52,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-23 19:36:52,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:52,532 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:52,533 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:52,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:52,533 INFO L82 PathProgramCache]: Analyzing trace with hash -54431304, now seen corresponding path program 70 times [2018-09-23 19:36:52,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:52,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:52,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:52,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:52,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5130 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:54,728 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:54,728 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:54,736 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:54,835 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:54,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:54,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5130 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:54,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:54,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-23 19:36:54,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 19:36:54,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 19:36:54,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:36:54,895 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 74 states. [2018-09-23 19:36:55,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:55,145 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2018-09-23 19:36:55,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 19:36:55,145 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 158 [2018-09-23 19:36:55,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:55,147 INFO L225 Difference]: With dead ends: 175 [2018-09-23 19:36:55,147 INFO L226 Difference]: Without dead ends: 161 [2018-09-23 19:36:55,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:36:55,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-23 19:36:55,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-23 19:36:55,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-23 19:36:55,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-09-23 19:36:55,154 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 158 [2018-09-23 19:36:55,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:55,154 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-09-23 19:36:55,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 19:36:55,154 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-09-23 19:36:55,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-23 19:36:55,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:55,155 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:55,155 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:55,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:55,156 INFO L82 PathProgramCache]: Analyzing trace with hash 837958580, now seen corresponding path program 71 times [2018-09-23 19:36:55,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:55,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:55,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:55,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:55,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5274 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:57,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:57,168 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:57,174 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:57,368 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-23 19:36:57,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:57,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5274 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:57,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:57,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-23 19:36:57,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 19:36:57,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 19:36:57,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:36:57,421 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 75 states. [2018-09-23 19:36:57,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:57,572 INFO L93 Difference]: Finished difference Result 177 states and 181 transitions. [2018-09-23 19:36:57,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 19:36:57,573 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 160 [2018-09-23 19:36:57,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:57,574 INFO L225 Difference]: With dead ends: 177 [2018-09-23 19:36:57,574 INFO L226 Difference]: Without dead ends: 163 [2018-09-23 19:36:57,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:36:57,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-23 19:36:57,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-23 19:36:57,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-23 19:36:57,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-09-23 19:36:57,581 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 160 [2018-09-23 19:36:57,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:57,581 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-09-23 19:36:57,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 19:36:57,582 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-09-23 19:36:57,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-23 19:36:57,582 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:57,583 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:36:57,583 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:57,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:57,583 INFO L82 PathProgramCache]: Analyzing trace with hash -568822096, now seen corresponding path program 72 times [2018-09-23 19:36:57,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:57,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:57,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:57,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:57,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:36:59,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:59,831 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:59,839 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:37:00,059 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2018-09-23 19:37:00,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:00,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:00,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:00,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-23 19:37:00,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 19:37:00,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 19:37:00,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:37:00,127 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 76 states. [2018-09-23 19:37:00,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:00,381 INFO L93 Difference]: Finished difference Result 179 states and 183 transitions. [2018-09-23 19:37:00,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 19:37:00,381 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 162 [2018-09-23 19:37:00,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:00,382 INFO L225 Difference]: With dead ends: 179 [2018-09-23 19:37:00,382 INFO L226 Difference]: Without dead ends: 165 [2018-09-23 19:37:00,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:37:00,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-23 19:37:00,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-23 19:37:00,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-23 19:37:00,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2018-09-23 19:37:00,389 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 162 [2018-09-23 19:37:00,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:00,389 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2018-09-23 19:37:00,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 19:37:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2018-09-23 19:37:00,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-23 19:37:00,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:00,391 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:37:00,391 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:00,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:00,391 INFO L82 PathProgramCache]: Analyzing trace with hash 429646508, now seen corresponding path program 73 times [2018-09-23 19:37:00,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:00,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:00,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:00,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:00,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:02,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:02,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:02,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:02,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:02,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:02,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-23 19:37:02,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 19:37:02,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 19:37:02,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:37:02,636 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 77 states. [2018-09-23 19:37:02,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:02,811 INFO L93 Difference]: Finished difference Result 181 states and 185 transitions. [2018-09-23 19:37:02,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:37:02,812 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 164 [2018-09-23 19:37:02,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:02,813 INFO L225 Difference]: With dead ends: 181 [2018-09-23 19:37:02,813 INFO L226 Difference]: Without dead ends: 167 [2018-09-23 19:37:02,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:37:02,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-23 19:37:02,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-23 19:37:02,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-23 19:37:02,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-09-23 19:37:02,820 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-09-23 19:37:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:02,820 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-09-23 19:37:02,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 19:37:02,820 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-09-23 19:37:02,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-23 19:37:02,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:02,821 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:37:02,821 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:02,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:02,822 INFO L82 PathProgramCache]: Analyzing trace with hash -2114699352, now seen corresponding path program 74 times [2018-09-23 19:37:02,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:02,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:02,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:02,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:02,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:05,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:05,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:05,296 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:05,303 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:37:05,414 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:37:05,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:05,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:05,475 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:05,475 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-23 19:37:05,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 19:37:05,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 19:37:05,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:37:05,476 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 78 states. [2018-09-23 19:37:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:05,635 INFO L93 Difference]: Finished difference Result 183 states and 187 transitions. [2018-09-23 19:37:05,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 19:37:05,636 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 166 [2018-09-23 19:37:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:05,637 INFO L225 Difference]: With dead ends: 183 [2018-09-23 19:37:05,637 INFO L226 Difference]: Without dead ends: 169 [2018-09-23 19:37:05,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:37:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-23 19:37:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-23 19:37:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-23 19:37:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-09-23 19:37:05,644 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 166 [2018-09-23 19:37:05,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:05,644 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-09-23 19:37:05,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 19:37:05,644 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-09-23 19:37:05,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-23 19:37:05,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:05,645 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:37:05,645 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:05,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:05,645 INFO L82 PathProgramCache]: Analyzing trace with hash 900287908, now seen corresponding path program 75 times [2018-09-23 19:37:05,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:05,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:05,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:05,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:05,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5870 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:07,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:07,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:07,808 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:37:08,046 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2018-09-23 19:37:08,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:08,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5870 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:08,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:08,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-23 19:37:08,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-23 19:37:08,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-23 19:37:08,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:37:08,106 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 79 states. [2018-09-23 19:37:08,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:08,324 INFO L93 Difference]: Finished difference Result 185 states and 189 transitions. [2018-09-23 19:37:08,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 19:37:08,324 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 168 [2018-09-23 19:37:08,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:08,325 INFO L225 Difference]: With dead ends: 185 [2018-09-23 19:37:08,325 INFO L226 Difference]: Without dead ends: 171 [2018-09-23 19:37:08,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:37:08,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-23 19:37:08,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-23 19:37:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-23 19:37:08,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-09-23 19:37:08,331 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 168 [2018-09-23 19:37:08,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:08,331 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-09-23 19:37:08,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-23 19:37:08,332 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-09-23 19:37:08,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-23 19:37:08,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:08,332 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:37:08,333 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:08,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:08,333 INFO L82 PathProgramCache]: Analyzing trace with hash -799880032, now seen corresponding path program 76 times [2018-09-23 19:37:08,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:08,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:08,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:08,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:08,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6024 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:10,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:10,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:10,546 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:37:10,660 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:37:10,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:10,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6024 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:10,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:10,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-23 19:37:10,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 19:37:10,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 19:37:10,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:37:10,717 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 80 states. [2018-09-23 19:37:10,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:10,866 INFO L93 Difference]: Finished difference Result 187 states and 191 transitions. [2018-09-23 19:37:10,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 19:37:10,866 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 170 [2018-09-23 19:37:10,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:10,867 INFO L225 Difference]: With dead ends: 187 [2018-09-23 19:37:10,868 INFO L226 Difference]: Without dead ends: 173 [2018-09-23 19:37:10,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:37:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-23 19:37:10,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-23 19:37:10,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-23 19:37:10,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-09-23 19:37:10,874 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-09-23 19:37:10,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:10,874 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-09-23 19:37:10,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 19:37:10,874 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-09-23 19:37:10,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-23 19:37:10,875 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:10,875 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:37:10,875 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:10,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:10,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1721269404, now seen corresponding path program 77 times [2018-09-23 19:37:10,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:10,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:10,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:10,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:10,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6180 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:13,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:13,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:13,124 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:37:13,352 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-09-23 19:37:13,353 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:13,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6180 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:13,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:13,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-23 19:37:13,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-23 19:37:13,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-23 19:37:13,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:37:13,416 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 81 states. [2018-09-23 19:37:13,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:13,655 INFO L93 Difference]: Finished difference Result 189 states and 193 transitions. [2018-09-23 19:37:13,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 19:37:13,655 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 172 [2018-09-23 19:37:13,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:13,656 INFO L225 Difference]: With dead ends: 189 [2018-09-23 19:37:13,657 INFO L226 Difference]: Without dead ends: 175 [2018-09-23 19:37:13,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:37:13,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-23 19:37:13,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-23 19:37:13,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-23 19:37:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-23 19:37:13,664 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 172 [2018-09-23 19:37:13,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:13,664 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-23 19:37:13,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-23 19:37:13,664 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-23 19:37:13,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-23 19:37:13,665 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:13,665 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:37:13,666 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:13,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:13,666 INFO L82 PathProgramCache]: Analyzing trace with hash -2110644840, now seen corresponding path program 78 times [2018-09-23 19:37:13,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:13,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:13,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:13,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:13,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6338 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:16,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:16,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:16,022 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:37:16,251 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2018-09-23 19:37:16,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:16,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6338 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:16,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:16,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-23 19:37:16,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 19:37:16,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 19:37:16,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:37:16,312 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 82 states. [2018-09-23 19:37:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:16,627 INFO L93 Difference]: Finished difference Result 191 states and 195 transitions. [2018-09-23 19:37:16,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 19:37:16,628 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 174 [2018-09-23 19:37:16,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:16,629 INFO L225 Difference]: With dead ends: 191 [2018-09-23 19:37:16,629 INFO L226 Difference]: Without dead ends: 177 [2018-09-23 19:37:16,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:37:16,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-23 19:37:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-23 19:37:16,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-23 19:37:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2018-09-23 19:37:16,636 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 174 [2018-09-23 19:37:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:16,636 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2018-09-23 19:37:16,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 19:37:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2018-09-23 19:37:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-23 19:37:16,637 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:16,637 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:37:16,638 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:16,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:16,638 INFO L82 PathProgramCache]: Analyzing trace with hash 501706644, now seen corresponding path program 79 times [2018-09-23 19:37:16,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:16,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:16,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:16,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:16,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:19,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:19,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:19,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:19,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:19,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:19,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-23 19:37:19,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 19:37:19,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 19:37:19,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:37:19,667 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 83 states. [2018-09-23 19:37:19,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:19,856 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2018-09-23 19:37:19,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 19:37:19,856 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 176 [2018-09-23 19:37:19,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:19,857 INFO L225 Difference]: With dead ends: 193 [2018-09-23 19:37:19,857 INFO L226 Difference]: Without dead ends: 179 [2018-09-23 19:37:19,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:37:19,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-23 19:37:19,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-23 19:37:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-23 19:37:19,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2018-09-23 19:37:19,863 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 176 [2018-09-23 19:37:19,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:19,863 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2018-09-23 19:37:19,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 19:37:19,863 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2018-09-23 19:37:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-23 19:37:19,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:19,864 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:37:19,864 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:19,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:19,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1584385392, now seen corresponding path program 80 times [2018-09-23 19:37:19,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:19,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:19,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:19,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:19,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6660 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:22,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:22,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:22,371 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:37:22,488 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:37:22,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:22,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6660 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:22,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:22,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-23 19:37:22,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 19:37:22,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 19:37:22,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:37:22,567 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand 84 states. [2018-09-23 19:37:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:22,887 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-09-23 19:37:22,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-23 19:37:22,888 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 178 [2018-09-23 19:37:22,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:22,889 INFO L225 Difference]: With dead ends: 195 [2018-09-23 19:37:22,889 INFO L226 Difference]: Without dead ends: 181 [2018-09-23 19:37:22,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:37:22,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-23 19:37:22,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-23 19:37:22,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-23 19:37:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-09-23 19:37:22,895 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 178 [2018-09-23 19:37:22,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:22,895 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-09-23 19:37:22,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 19:37:22,895 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-09-23 19:37:22,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-23 19:37:22,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:22,896 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:37:22,896 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:22,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:22,896 INFO L82 PathProgramCache]: Analyzing trace with hash -569104756, now seen corresponding path program 81 times [2018-09-23 19:37:22,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:22,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:22,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:22,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:22,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6824 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:25,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:25,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:25,751 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:37:26,007 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 83 check-sat command(s) [2018-09-23 19:37:26,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:26,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6824 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:26,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:26,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-23 19:37:26,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-23 19:37:26,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-23 19:37:26,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:37:26,084 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 85 states. [2018-09-23 19:37:26,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:26,288 INFO L93 Difference]: Finished difference Result 197 states and 201 transitions. [2018-09-23 19:37:26,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 19:37:26,289 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 180 [2018-09-23 19:37:26,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:26,290 INFO L225 Difference]: With dead ends: 197 [2018-09-23 19:37:26,290 INFO L226 Difference]: Without dead ends: 183 [2018-09-23 19:37:26,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:37:26,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-23 19:37:26,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-23 19:37:26,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-23 19:37:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2018-09-23 19:37:26,296 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 180 [2018-09-23 19:37:26,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:26,296 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2018-09-23 19:37:26,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-23 19:37:26,296 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2018-09-23 19:37:26,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-23 19:37:26,297 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:26,297 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:37:26,297 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:26,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:26,298 INFO L82 PathProgramCache]: Analyzing trace with hash 158010248, now seen corresponding path program 82 times [2018-09-23 19:37:26,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:26,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:26,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:26,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:26,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6990 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:29,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:29,196 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:29,203 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:37:29,333 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:37:29,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:29,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6990 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:29,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:29,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-23 19:37:29,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 19:37:29,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 19:37:29,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:37:29,394 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 86 states. [2018-09-23 19:37:29,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:29,604 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2018-09-23 19:37:29,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 19:37:29,605 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 182 [2018-09-23 19:37:29,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:29,605 INFO L225 Difference]: With dead ends: 199 [2018-09-23 19:37:29,606 INFO L226 Difference]: Without dead ends: 185 [2018-09-23 19:37:29,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:37:29,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-23 19:37:29,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-23 19:37:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-23 19:37:29,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-23 19:37:29,612 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-09-23 19:37:29,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:29,612 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-23 19:37:29,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 19:37:29,613 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-23 19:37:29,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-23 19:37:29,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:29,614 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:37:29,614 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:29,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:29,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1164140156, now seen corresponding path program 83 times [2018-09-23 19:37:29,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:29,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:29,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:29,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:29,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7158 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:32,282 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:32,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:32,290 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:37:32,538 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-09-23 19:37:32,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:32,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7158 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:32,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:32,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-23 19:37:32,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-23 19:37:32,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-23 19:37:32,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:37:32,599 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 87 states. [2018-09-23 19:37:32,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:32,940 INFO L93 Difference]: Finished difference Result 201 states and 205 transitions. [2018-09-23 19:37:32,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-23 19:37:32,941 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 184 [2018-09-23 19:37:32,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:32,942 INFO L225 Difference]: With dead ends: 201 [2018-09-23 19:37:32,942 INFO L226 Difference]: Without dead ends: 187 [2018-09-23 19:37:32,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:37:32,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-23 19:37:32,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-23 19:37:32,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-23 19:37:32,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-09-23 19:37:32,966 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 184 [2018-09-23 19:37:32,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:32,967 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-09-23 19:37:32,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-23 19:37:32,967 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-09-23 19:37:32,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-23 19:37:32,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:32,968 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:37:32,968 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:32,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:32,968 INFO L82 PathProgramCache]: Analyzing trace with hash -440358784, now seen corresponding path program 84 times [2018-09-23 19:37:32,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:32,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:32,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:32,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:32,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7328 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:36,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:36,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:36,016 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:37:36,278 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-09-23 19:37:36,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:36,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7328 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:36,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:36,338 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-23 19:37:36,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 19:37:36,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 19:37:36,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:37:36,339 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 88 states. [2018-09-23 19:37:36,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:36,633 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2018-09-23 19:37:36,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-23 19:37:36,633 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 186 [2018-09-23 19:37:36,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:36,634 INFO L225 Difference]: With dead ends: 203 [2018-09-23 19:37:36,634 INFO L226 Difference]: Without dead ends: 189 [2018-09-23 19:37:36,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:37:36,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-23 19:37:36,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-23 19:37:36,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-23 19:37:36,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2018-09-23 19:37:36,642 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 186 [2018-09-23 19:37:36,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:36,642 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2018-09-23 19:37:36,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 19:37:36,642 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2018-09-23 19:37:36,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-23 19:37:36,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:36,643 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:37:36,644 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:36,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:36,644 INFO L82 PathProgramCache]: Analyzing trace with hash -671162244, now seen corresponding path program 85 times [2018-09-23 19:37:36,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:36,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:36,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:36,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:36,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:39,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:39,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:39,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:39,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:39,918 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:39,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-23 19:37:39,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 19:37:39,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 19:37:39,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:37:39,920 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 89 states. [2018-09-23 19:37:40,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:40,162 INFO L93 Difference]: Finished difference Result 205 states and 209 transitions. [2018-09-23 19:37:40,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 19:37:40,162 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 188 [2018-09-23 19:37:40,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:40,163 INFO L225 Difference]: With dead ends: 205 [2018-09-23 19:37:40,163 INFO L226 Difference]: Without dead ends: 191 [2018-09-23 19:37:40,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:37:40,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-23 19:37:40,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-23 19:37:40,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-23 19:37:40,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-09-23 19:37:40,171 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-09-23 19:37:40,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:40,172 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-09-23 19:37:40,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 19:37:40,172 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-09-23 19:37:40,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-23 19:37:40,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:40,173 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:37:40,173 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:40,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:40,173 INFO L82 PathProgramCache]: Analyzing trace with hash 865012088, now seen corresponding path program 86 times [2018-09-23 19:37:40,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:40,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:40,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:40,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:40,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7674 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:43,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:43,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:43,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:37:43,149 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:37:43,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:43,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7674 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:43,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:43,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-23 19:37:43,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 19:37:43,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 19:37:43,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:37:43,216 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 90 states. [2018-09-23 19:37:43,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:43,386 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2018-09-23 19:37:43,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-23 19:37:43,387 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 190 [2018-09-23 19:37:43,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:43,388 INFO L225 Difference]: With dead ends: 207 [2018-09-23 19:37:43,388 INFO L226 Difference]: Without dead ends: 193 [2018-09-23 19:37:43,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:37:43,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-23 19:37:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-23 19:37:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-23 19:37:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-09-23 19:37:43,394 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 190 [2018-09-23 19:37:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:43,394 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-09-23 19:37:43,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 19:37:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-09-23 19:37:43,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-23 19:37:43,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:43,395 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:37:43,395 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:43,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:43,395 INFO L82 PathProgramCache]: Analyzing trace with hash -340204684, now seen corresponding path program 87 times [2018-09-23 19:37:43,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:43,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:43,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:43,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:43,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7850 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:46,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:46,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:46,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:37:46,910 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 89 check-sat command(s) [2018-09-23 19:37:46,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:46,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7850 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:46,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:46,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-23 19:37:46,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-23 19:37:46,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-23 19:37:46,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 19:37:46,974 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 91 states. [2018-09-23 19:37:47,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:47,296 INFO L93 Difference]: Finished difference Result 209 states and 213 transitions. [2018-09-23 19:37:47,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-23 19:37:47,297 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 192 [2018-09-23 19:37:47,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:47,298 INFO L225 Difference]: With dead ends: 209 [2018-09-23 19:37:47,298 INFO L226 Difference]: Without dead ends: 195 [2018-09-23 19:37:47,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 19:37:47,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-23 19:37:47,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-23 19:37:47,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-23 19:37:47,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2018-09-23 19:37:47,304 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 192 [2018-09-23 19:37:47,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:47,304 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2018-09-23 19:37:47,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-23 19:37:47,304 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2018-09-23 19:37:47,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-23 19:37:47,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:47,305 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:37:47,305 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:47,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:47,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1087647344, now seen corresponding path program 88 times [2018-09-23 19:37:47,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:47,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:47,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:47,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:47,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8028 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:50,633 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:50,633 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:50,640 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:37:50,764 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:37:50,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:50,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8028 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:50,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:50,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-23 19:37:50,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 19:37:50,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 19:37:50,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:37:50,828 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 92 states. [2018-09-23 19:37:51,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:51,057 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2018-09-23 19:37:51,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-23 19:37:51,058 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 194 [2018-09-23 19:37:51,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:51,059 INFO L225 Difference]: With dead ends: 211 [2018-09-23 19:37:51,059 INFO L226 Difference]: Without dead ends: 197 [2018-09-23 19:37:51,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:37:51,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-23 19:37:51,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-23 19:37:51,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-23 19:37:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2018-09-23 19:37:51,068 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 194 [2018-09-23 19:37:51,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:51,069 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2018-09-23 19:37:51,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 19:37:51,069 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2018-09-23 19:37:51,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-23 19:37:51,070 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:51,070 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:37:51,070 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:51,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1136088468, now seen corresponding path program 89 times [2018-09-23 19:37:51,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:51,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:51,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:51,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:51,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8208 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:54,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:54,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:54,125 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:37:54,411 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2018-09-23 19:37:54,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:54,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8208 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:54,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:54,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-23 19:37:54,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-23 19:37:54,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-23 19:37:54,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 19:37:54,475 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand 93 states. [2018-09-23 19:37:54,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:54,802 INFO L93 Difference]: Finished difference Result 213 states and 217 transitions. [2018-09-23 19:37:54,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-23 19:37:54,803 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 196 [2018-09-23 19:37:54,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:54,804 INFO L225 Difference]: With dead ends: 213 [2018-09-23 19:37:54,804 INFO L226 Difference]: Without dead ends: 199 [2018-09-23 19:37:54,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 19:37:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-23 19:37:54,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-23 19:37:54,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-23 19:37:54,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-09-23 19:37:54,811 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 196 [2018-09-23 19:37:54,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:54,811 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-09-23 19:37:54,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-23 19:37:54,811 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-09-23 19:37:54,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-23 19:37:54,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:54,812 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:37:54,812 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:54,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:54,812 INFO L82 PathProgramCache]: Analyzing trace with hash 747509608, now seen corresponding path program 90 times [2018-09-23 19:37:54,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:54,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:54,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:54,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:54,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8390 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:57,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:57,919 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:57,927 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:37:58,213 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 92 check-sat command(s) [2018-09-23 19:37:58,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:58,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8390 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:37:58,276 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:58,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-23 19:37:58,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 19:37:58,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 19:37:58,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:37:58,278 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 94 states. [2018-09-23 19:37:58,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:58,478 INFO L93 Difference]: Finished difference Result 215 states and 219 transitions. [2018-09-23 19:37:58,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-23 19:37:58,479 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 198 [2018-09-23 19:37:58,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:58,480 INFO L225 Difference]: With dead ends: 215 [2018-09-23 19:37:58,480 INFO L226 Difference]: Without dead ends: 201 [2018-09-23 19:37:58,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:37:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-23 19:37:58,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-23 19:37:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-23 19:37:58,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2018-09-23 19:37:58,486 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 198 [2018-09-23 19:37:58,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:58,486 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2018-09-23 19:37:58,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 19:37:58,486 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2018-09-23 19:37:58,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-23 19:37:58,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:58,487 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:37:58,487 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:58,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:58,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1590938268, now seen corresponding path program 91 times [2018-09-23 19:37:58,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:58,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:58,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:58,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:58,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:01,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:01,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:01,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:02,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:02,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:02,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-23 19:38:02,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-23 19:38:02,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-23 19:38:02,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 19:38:02,143 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand 95 states. [2018-09-23 19:38:02,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:02,356 INFO L93 Difference]: Finished difference Result 217 states and 221 transitions. [2018-09-23 19:38:02,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-23 19:38:02,356 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 200 [2018-09-23 19:38:02,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:02,357 INFO L225 Difference]: With dead ends: 217 [2018-09-23 19:38:02,357 INFO L226 Difference]: Without dead ends: 203 [2018-09-23 19:38:02,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 19:38:02,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-23 19:38:02,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-23 19:38:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-23 19:38:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-09-23 19:38:02,363 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-09-23 19:38:02,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:02,364 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-09-23 19:38:02,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-23 19:38:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-09-23 19:38:02,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-23 19:38:02,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:02,365 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:38:02,365 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:02,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:02,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1723516000, now seen corresponding path program 92 times [2018-09-23 19:38:02,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:02,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:02,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:02,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:02,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:06,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8760 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:06,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:06,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:06,572 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:38:06,705 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:38:06,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:06,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8760 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:06,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:06,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-23 19:38:06,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 19:38:06,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 19:38:06,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:38:06,773 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 96 states. [2018-09-23 19:38:07,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:07,043 INFO L93 Difference]: Finished difference Result 219 states and 223 transitions. [2018-09-23 19:38:07,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-23 19:38:07,044 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 202 [2018-09-23 19:38:07,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:07,045 INFO L225 Difference]: With dead ends: 219 [2018-09-23 19:38:07,045 INFO L226 Difference]: Without dead ends: 205 [2018-09-23 19:38:07,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:38:07,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-23 19:38:07,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-23 19:38:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-23 19:38:07,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-09-23 19:38:07,056 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 202 [2018-09-23 19:38:07,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:07,056 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-09-23 19:38:07,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 19:38:07,056 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-09-23 19:38:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-23 19:38:07,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:07,057 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:38:07,058 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:07,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:07,058 INFO L82 PathProgramCache]: Analyzing trace with hash 48333916, now seen corresponding path program 93 times [2018-09-23 19:38:07,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:07,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:07,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:07,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:07,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8948 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:10,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:10,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:10,629 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:38:10,956 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 95 check-sat command(s) [2018-09-23 19:38:10,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:10,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8948 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:11,021 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:11,021 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-23 19:38:11,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-23 19:38:11,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-23 19:38:11,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 19:38:11,023 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 97 states. [2018-09-23 19:38:11,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:11,257 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2018-09-23 19:38:11,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-23 19:38:11,258 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 204 [2018-09-23 19:38:11,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:11,259 INFO L225 Difference]: With dead ends: 221 [2018-09-23 19:38:11,259 INFO L226 Difference]: Without dead ends: 207 [2018-09-23 19:38:11,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 19:38:11,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-23 19:38:11,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-23 19:38:11,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-23 19:38:11,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2018-09-23 19:38:11,265 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 204 [2018-09-23 19:38:11,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:11,266 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2018-09-23 19:38:11,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-23 19:38:11,266 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2018-09-23 19:38:11,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-23 19:38:11,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:11,267 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:38:11,267 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:11,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:11,267 INFO L82 PathProgramCache]: Analyzing trace with hash 811087192, now seen corresponding path program 94 times [2018-09-23 19:38:11,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:11,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:11,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:11,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:11,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:14,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9138 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:14,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:14,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:14,634 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:38:14,763 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:38:14,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:14,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9138 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:14,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:14,828 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-23 19:38:14,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 19:38:14,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 19:38:14,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:38:14,830 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand 98 states. [2018-09-23 19:38:15,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:15,060 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2018-09-23 19:38:15,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-23 19:38:15,060 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 206 [2018-09-23 19:38:15,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:15,061 INFO L225 Difference]: With dead ends: 223 [2018-09-23 19:38:15,061 INFO L226 Difference]: Without dead ends: 209 [2018-09-23 19:38:15,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:38:15,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-23 19:38:15,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-23 19:38:15,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-23 19:38:15,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-09-23 19:38:15,067 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-09-23 19:38:15,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:15,067 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-09-23 19:38:15,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 19:38:15,068 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-09-23 19:38:15,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-23 19:38:15,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:15,068 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:38:15,069 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:15,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:15,069 INFO L82 PathProgramCache]: Analyzing trace with hash -622422188, now seen corresponding path program 95 times [2018-09-23 19:38:15,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:15,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:15,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:15,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:15,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9330 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:18,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:18,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:18,513 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:38:18,814 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2018-09-23 19:38:18,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:18,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9330 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:18,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:18,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-23 19:38:18,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-23 19:38:18,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-23 19:38:18,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 19:38:18,884 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 99 states. [2018-09-23 19:38:19,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:19,255 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-09-23 19:38:19,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-23 19:38:19,256 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 208 [2018-09-23 19:38:19,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:19,257 INFO L225 Difference]: With dead ends: 225 [2018-09-23 19:38:19,257 INFO L226 Difference]: Without dead ends: 211 [2018-09-23 19:38:19,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 19:38:19,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-23 19:38:19,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-23 19:38:19,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-23 19:38:19,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-09-23 19:38:19,263 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 208 [2018-09-23 19:38:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:19,264 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-09-23 19:38:19,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-23 19:38:19,264 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-09-23 19:38:19,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-23 19:38:19,264 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:19,265 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:38:19,265 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:19,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:19,265 INFO L82 PathProgramCache]: Analyzing trace with hash 459565648, now seen corresponding path program 96 times [2018-09-23 19:38:19,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:19,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:19,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:19,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:19,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9524 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:23,093 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:23,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:23,101 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:38:23,423 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 98 check-sat command(s) [2018-09-23 19:38:23,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:23,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9524 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:23,491 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:23,491 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-23 19:38:23,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 19:38:23,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 19:38:23,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:38:23,493 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 100 states. [2018-09-23 19:38:23,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:23,815 INFO L93 Difference]: Finished difference Result 227 states and 231 transitions. [2018-09-23 19:38:23,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-23 19:38:23,816 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 210 [2018-09-23 19:38:23,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:23,817 INFO L225 Difference]: With dead ends: 227 [2018-09-23 19:38:23,817 INFO L226 Difference]: Without dead ends: 213 [2018-09-23 19:38:23,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:38:23,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-23 19:38:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-23 19:38:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-23 19:38:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2018-09-23 19:38:23,826 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 210 [2018-09-23 19:38:23,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:23,826 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2018-09-23 19:38:23,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 19:38:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2018-09-23 19:38:23,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-23 19:38:23,827 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:23,828 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:38:23,828 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:23,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:23,828 INFO L82 PathProgramCache]: Analyzing trace with hash 867790412, now seen corresponding path program 97 times [2018-09-23 19:38:23,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:23,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:23,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:23,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:23,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:27,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:27,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:27,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:27,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:27,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:27,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-23 19:38:27,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-23 19:38:27,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-23 19:38:27,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 19:38:27,854 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand 101 states. [2018-09-23 19:38:28,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:28,193 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2018-09-23 19:38:28,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-23 19:38:28,193 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 212 [2018-09-23 19:38:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:28,194 INFO L225 Difference]: With dead ends: 229 [2018-09-23 19:38:28,194 INFO L226 Difference]: Without dead ends: 215 [2018-09-23 19:38:28,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 19:38:28,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-23 19:38:28,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-23 19:38:28,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-23 19:38:28,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2018-09-23 19:38:28,204 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 212 [2018-09-23 19:38:28,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:28,204 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2018-09-23 19:38:28,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-23 19:38:28,205 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2018-09-23 19:38:28,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-23 19:38:28,205 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:28,205 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:38:28,206 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:28,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:28,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1965202616, now seen corresponding path program 98 times [2018-09-23 19:38:28,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:28,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:28,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:28,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:28,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9918 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:32,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:32,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:32,233 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:38:32,374 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:38:32,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:32,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9918 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:32,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:32,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-23 19:38:32,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 19:38:32,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 19:38:32,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:38:32,446 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand 102 states. [2018-09-23 19:38:32,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:32,767 INFO L93 Difference]: Finished difference Result 231 states and 235 transitions. [2018-09-23 19:38:32,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-23 19:38:32,768 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 214 [2018-09-23 19:38:32,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:32,769 INFO L225 Difference]: With dead ends: 231 [2018-09-23 19:38:32,769 INFO L226 Difference]: Without dead ends: 217 [2018-09-23 19:38:32,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:38:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-23 19:38:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-23 19:38:32,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-23 19:38:32,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2018-09-23 19:38:32,778 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 214 [2018-09-23 19:38:32,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:32,779 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2018-09-23 19:38:32,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 19:38:32,779 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2018-09-23 19:38:32,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-23 19:38:32,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:32,780 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:38:32,780 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:32,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:32,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1462236860, now seen corresponding path program 99 times [2018-09-23 19:38:32,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:32,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:32,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:32,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:32,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10118 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:36,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:36,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:36,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:38:37,218 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 101 check-sat command(s) [2018-09-23 19:38:37,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:37,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10118 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:37,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:37,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-23 19:38:37,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-23 19:38:37,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-23 19:38:37,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 19:38:37,289 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 103 states. [2018-09-23 19:38:37,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:37,717 INFO L93 Difference]: Finished difference Result 233 states and 237 transitions. [2018-09-23 19:38:37,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-23 19:38:37,718 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 216 [2018-09-23 19:38:37,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:37,719 INFO L225 Difference]: With dead ends: 233 [2018-09-23 19:38:37,719 INFO L226 Difference]: Without dead ends: 219 [2018-09-23 19:38:37,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 19:38:37,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-23 19:38:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-23 19:38:37,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-23 19:38:37,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2018-09-23 19:38:37,727 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 216 [2018-09-23 19:38:37,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:37,727 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2018-09-23 19:38:37,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-23 19:38:37,727 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2018-09-23 19:38:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-23 19:38:37,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:37,728 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:38:37,728 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:37,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:37,729 INFO L82 PathProgramCache]: Analyzing trace with hash 851517504, now seen corresponding path program 100 times [2018-09-23 19:38:37,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:37,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:37,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:37,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:37,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10320 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:41,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:41,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:41,990 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:38:42,133 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:38:42,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:42,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10320 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:42,202 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:42,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-23 19:38:42,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 19:38:42,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 19:38:42,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:38:42,205 INFO L87 Difference]: Start difference. First operand 219 states and 221 transitions. Second operand 104 states. [2018-09-23 19:38:42,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:42,660 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2018-09-23 19:38:42,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-23 19:38:42,661 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 218 [2018-09-23 19:38:42,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:42,662 INFO L225 Difference]: With dead ends: 235 [2018-09-23 19:38:42,662 INFO L226 Difference]: Without dead ends: 221 [2018-09-23 19:38:42,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:38:42,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-23 19:38:42,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-23 19:38:42,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-23 19:38:42,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-09-23 19:38:42,669 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 218 [2018-09-23 19:38:42,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:42,670 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-09-23 19:38:42,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 19:38:42,670 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-09-23 19:38:42,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-23 19:38:42,671 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:42,671 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:38:42,671 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:42,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:42,671 INFO L82 PathProgramCache]: Analyzing trace with hash -423598020, now seen corresponding path program 101 times [2018-09-23 19:38:42,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:42,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:42,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:42,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:42,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10524 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:46,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:46,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:46,934 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:38:47,270 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 103 check-sat command(s) [2018-09-23 19:38:47,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:47,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10524 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:47,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:47,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-23 19:38:47,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-23 19:38:47,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-23 19:38:47,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 19:38:47,344 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 105 states. [2018-09-23 19:38:47,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:47,807 INFO L93 Difference]: Finished difference Result 237 states and 241 transitions. [2018-09-23 19:38:47,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-23 19:38:47,807 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 220 [2018-09-23 19:38:47,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:47,808 INFO L225 Difference]: With dead ends: 237 [2018-09-23 19:38:47,808 INFO L226 Difference]: Without dead ends: 223 [2018-09-23 19:38:47,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 19:38:47,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-23 19:38:47,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-23 19:38:47,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-23 19:38:47,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2018-09-23 19:38:47,815 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 220 [2018-09-23 19:38:47,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:47,815 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2018-09-23 19:38:47,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-23 19:38:47,815 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2018-09-23 19:38:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-23 19:38:47,816 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:47,816 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:38:47,816 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:47,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:47,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1743937224, now seen corresponding path program 102 times [2018-09-23 19:38:47,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:47,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:47,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:47,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:47,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 10730 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:52,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:52,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:52,066 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:38:52,428 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 104 check-sat command(s) [2018-09-23 19:38:52,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:52,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10730 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:52,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:52,505 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-23 19:38:52,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-23 19:38:52,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-23 19:38:52,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:38:52,507 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand 106 states. [2018-09-23 19:38:52,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:52,975 INFO L93 Difference]: Finished difference Result 239 states and 243 transitions. [2018-09-23 19:38:52,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-23 19:38:52,975 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 222 [2018-09-23 19:38:52,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:52,976 INFO L225 Difference]: With dead ends: 239 [2018-09-23 19:38:52,976 INFO L226 Difference]: Without dead ends: 225 [2018-09-23 19:38:52,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:38:52,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-09-23 19:38:52,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-09-23 19:38:52,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-23 19:38:52,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2018-09-23 19:38:52,985 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 222 [2018-09-23 19:38:52,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:52,985 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2018-09-23 19:38:52,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-23 19:38:52,985 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2018-09-23 19:38:52,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-23 19:38:52,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:52,986 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:38:52,986 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:52,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:52,987 INFO L82 PathProgramCache]: Analyzing trace with hash 720407348, now seen corresponding path program 103 times [2018-09-23 19:38:52,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:52,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:52,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:52,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:52,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10938 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:57,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:57,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:57,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:57,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10938 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:38:57,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:57,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-23 19:38:57,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-23 19:38:57,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-23 19:38:57,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 19:38:57,572 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand 107 states. [2018-09-23 19:38:57,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:57,895 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2018-09-23 19:38:57,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-23 19:38:57,896 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 224 [2018-09-23 19:38:57,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:57,896 INFO L225 Difference]: With dead ends: 241 [2018-09-23 19:38:57,897 INFO L226 Difference]: Without dead ends: 227 [2018-09-23 19:38:57,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 19:38:57,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-23 19:38:57,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-23 19:38:57,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-23 19:38:57,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2018-09-23 19:38:57,905 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 224 [2018-09-23 19:38:57,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:57,906 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2018-09-23 19:38:57,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-23 19:38:57,906 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2018-09-23 19:38:57,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-23 19:38:57,907 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:57,907 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:38:57,907 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:57,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:57,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1866406352, now seen corresponding path program 104 times [2018-09-23 19:38:57,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:57,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:57,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:57,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:57,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11148 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:39:02,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:02,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:02,323 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:02,470 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:02,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:02,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11148 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:39:02,543 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:02,543 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-23 19:39:02,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-23 19:39:02,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-23 19:39:02,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:39:02,545 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand 108 states. [2018-09-23 19:39:02,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:02,904 INFO L93 Difference]: Finished difference Result 243 states and 247 transitions. [2018-09-23 19:39:02,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-23 19:39:02,905 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 226 [2018-09-23 19:39:02,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:02,905 INFO L225 Difference]: With dead ends: 243 [2018-09-23 19:39:02,906 INFO L226 Difference]: Without dead ends: 229 [2018-09-23 19:39:02,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:39:02,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-23 19:39:02,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-09-23 19:39:02,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-23 19:39:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2018-09-23 19:39:02,912 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 226 [2018-09-23 19:39:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:02,912 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2018-09-23 19:39:02,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-23 19:39:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2018-09-23 19:39:02,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-23 19:39:02,913 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:02,913 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:39:02,913 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:02,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:02,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1008307668, now seen corresponding path program 105 times [2018-09-23 19:39:02,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:02,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:02,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:02,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:02,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11360 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:39:07,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:07,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:07,420 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:07,812 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 107 check-sat command(s) [2018-09-23 19:39:07,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:07,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11360 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 19:39:07,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:07,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-23 19:39:07,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-23 19:39:07,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-23 19:39:07,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 19:39:07,887 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand 109 states. [2018-09-23 19:39:08,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:08,366 INFO L93 Difference]: Finished difference Result 245 states and 249 transitions. [2018-09-23 19:39:08,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-23 19:39:08,366 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 228 [2018-09-23 19:39:08,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:08,367 INFO L225 Difference]: With dead ends: 245 [2018-09-23 19:39:08,367 INFO L226 Difference]: Without dead ends: 231 [2018-09-23 19:39:08,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 19:39:08,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-23 19:39:08,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-23 19:39:08,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-23 19:39:08,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2018-09-23 19:39:08,374 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 228 [2018-09-23 19:39:08,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:08,374 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2018-09-23 19:39:08,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-23 19:39:08,375 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2018-09-23 19:39:08,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-23 19:39:08,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:08,375 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:39:08,375 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:08,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:08,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1009193176, now seen corresponding path program 106 times [2018-09-23 19:39:08,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:08,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:08,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:08,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:08,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 19:39:11,654 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:39:11,658 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:39:11,658 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:39:11 BoogieIcfgContainer [2018-09-23 19:39:11,658 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:39:11,659 INFO L168 Benchmark]: Toolchain (without parser) took 235477.33 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 191.9 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 285.3 MB). Peak memory consumption was 477.2 MB. Max. memory is 7.1 GB. [2018-09-23 19:39:11,660 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.96 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:39:11,661 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.33 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:39:11,661 INFO L168 Benchmark]: Boogie Preprocessor took 23.50 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:39:11,661 INFO L168 Benchmark]: RCFGBuilder took 371.65 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:39:11,661 INFO L168 Benchmark]: TraceAbstraction took 235037.04 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 191.9 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 264.1 MB). Peak memory consumption was 456.0 MB. Max. memory is 7.1 GB. [2018-09-23 19:39:11,664 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 0.96 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 39.33 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.50 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 371.65 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235037.04 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 191.9 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 264.1 MB). Peak memory consumption was 456.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 83). Cancelled while BasicCegarLoop was analyzing trace of length 231 with TraceHistMax 108, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 93 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 234.9s OverallTime, 110 OverallIterations, 108 TraceHistogramMax, 25.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 981 SDtfs, 31 SDslu, 21858 SDs, 0 SdLazy, 12328 SolverSat, 187 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18817 GetRequests, 13033 SyntacticMatches, 0 SemanticMatches, 5784 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 176.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=231occurred in iteration=109, 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: 0.6s AutomataMinimizationTime, 109 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.6s SsaConstructionTime, 14.7s SatisfiabilityAnalysisTime, 183.1s InterpolantComputationTime, 26087 NumberOfCodeBlocks, 26087 NumberOfCodeBlocksAsserted, 3093 NumberOfCheckSat, 25872 ConstructedInterpolants, 0 QuantifiedInterpolants, 11175426 SizeOfPredicates, 106 NumberOfNonLiveVariables, 63561 ConjunctsInSsa, 5883 ConjunctsInUnsatCore, 215 InterpolantComputations, 3 PerfectInterpolantSequences, 3792/820416 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/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-39-11-672.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-39-11-672.csv Completed graceful shutdown