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-b2fde6a [2018-09-28 09:59:52,631 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 09:59:52,636 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 09:59:52,654 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 09:59:52,654 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 09:59:52,655 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 09:59:52,658 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 09:59:52,660 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 09:59:52,663 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 09:59:52,665 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 09:59:52,666 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-28 09:59:52,710 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-28 09:59:52,728 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 09:59:52,728 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 09:59:52,729 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 09:59:52,730 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 09:59:52,730 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 09:59:52,731 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 09:59:52,731 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 09:59:52,731 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 09:59:52,731 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 09:59:52,731 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 09:59:52,732 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 09:59:52,732 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 09:59:52,732 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 09:59:52,732 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 09:59:52,734 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 09:59:52,734 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 09:59:52,734 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 09:59:52,734 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 09:59:52,734 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 09:59:52,735 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 09:59:52,735 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 09:59:52,735 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 09:59:52,735 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 09:59:52,736 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 09:59:52,737 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 09:59:52,737 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 09:59:52,737 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 09:59:52,737 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 09:59:52,738 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 09:59:52,738 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 09:59:52,799 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 09:59:52,815 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 09:59:52,822 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 09:59:52,823 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 09:59:52,824 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 09:59:52,825 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-28 09:59:52,825 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl' [2018-09-28 09:59:52,886 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 09:59:52,890 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 09:59:52,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 09:59:52,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 09:59:52,891 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 09:59:52,912 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 28.09 09:59:52" (1/1) ... [2018-09-28 09:59:52,925 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 28.09 09:59:52" (1/1) ... [2018-09-28 09:59:52,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 09:59:52,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 09:59:52,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 09:59:52,933 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 09:59:52,944 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 28.09 09:59:52" (1/1) ... [2018-09-28 09:59:52,945 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 28.09 09:59:52" (1/1) ... [2018-09-28 09:59:52,946 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 28.09 09:59:52" (1/1) ... [2018-09-28 09:59:52,946 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 28.09 09:59:52" (1/1) ... [2018-09-28 09:59:52,950 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 28.09 09:59:52" (1/1) ... [2018-09-28 09:59:52,952 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 28.09 09:59:52" (1/1) ... [2018-09-28 09:59:52,954 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 28.09 09:59:52" (1/1) ... [2018-09-28 09:59:52,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 09:59:52,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 09:59:52,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 09:59:52,961 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 09:59:52,962 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 28.09 09:59:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 09:59:53,034 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-28 09:59:53,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-28 09:59:53,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-28 09:59:53,242 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-28 09:59:53,242 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 09:59:53 BoogieIcfgContainer [2018-09-28 09:59:53,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 09:59:53,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 09:59:53,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 09:59:53,247 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 09:59:53,247 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 28.09 09:59:52" (1/2) ... [2018-09-28 09:59:53,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b8d284 and model type fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 09:59:53, skipping insertion in model container [2018-09-28 09:59:53,249 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 28.09 09:59:53" (2/2) ... [2018-09-28 09:59:53,251 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-28 09:59:53,261 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 09:59:53,269 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 09:59:53,321 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 09:59:53,322 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 09:59:53,322 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 09:59:53,323 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 09:59:53,323 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 09:59:53,323 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 09:59:53,323 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 09:59:53,323 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 09:59:53,324 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 09:59:53,339 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-09-28 09:59:53,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 09:59:53,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:53,347 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:59:53,348 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:53,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:53,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1807861163, now seen corresponding path program 1 times [2018-09-28 09:59:53,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:53,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:53,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:53,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:53,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:53,517 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 09:59:53,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-28 09:59:53,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 09:59:53,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 09:59:53,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 09:59:53,539 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-09-28 09:59:53,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:53,604 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-09-28 09:59:53,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 09:59:53,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-09-28 09:59:53,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:53,616 INFO L225 Difference]: With dead ends: 17 [2018-09-28 09:59:53,616 INFO L226 Difference]: Without dead ends: 10 [2018-09-28 09:59:53,620 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 [2018-09-28 09:59:53,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-28 09:59:53,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-28 09:59:53,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 09:59:53,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-28 09:59:53,656 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-09-28 09:59:53,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:53,657 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-28 09:59:53,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 09:59:53,657 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-28 09:59:53,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 09:59:53,658 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:53,658 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-09-28 09:59:53,658 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:53,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:53,659 INFO L82 PathProgramCache]: Analyzing trace with hash 89245487, now seen corresponding path program 1 times [2018-09-28 09:59:53,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:53,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:53,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:53,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:53,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:53,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:53,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 09:59:53,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:53,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:53,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:53,901 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 09:59:53,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 09:59:53,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 09:59:53,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-28 09:59:53,903 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-09-28 09:59:54,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:54,015 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-09-28 09:59:54,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 09:59:54,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-09-28 09:59:54,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:54,016 INFO L225 Difference]: With dead ends: 17 [2018-09-28 09:59:54,016 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 09:59:54,017 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 [2018-09-28 09:59:54,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 09:59:54,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-28 09:59:54,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 09:59:54,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-09-28 09:59:54,021 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-09-28 09:59:54,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:54,022 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-09-28 09:59:54,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 09:59:54,022 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-09-28 09:59:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 09:59:54,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:54,023 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-09-28 09:59:54,023 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:54,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:54,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2061989811, now seen corresponding path program 2 times [2018-09-28 09:59:54,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:54,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:54,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:54,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:54,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 09:59:54,148 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 09:59:54,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-28 09:59:54,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 09:59:54,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 09:59:54,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 09:59:54,149 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 5 states. [2018-09-28 09:59:54,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:54,251 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2018-09-28 09:59:54,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 09:59:54,252 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-09-28 09:59:54,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:54,253 INFO L225 Difference]: With dead ends: 32 [2018-09-28 09:59:54,254 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 09:59:54,254 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 [2018-09-28 09:59:54,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 09:59:54,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2018-09-28 09:59:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 09:59:54,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2018-09-28 09:59:54,262 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2018-09-28 09:59:54,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:54,262 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2018-09-28 09:59:54,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 09:59:54,263 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2018-09-28 09:59:54,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 09:59:54,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:54,264 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-09-28 09:59:54,264 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:54,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:54,264 INFO L82 PathProgramCache]: Analyzing trace with hash 2062049393, now seen corresponding path program 1 times [2018-09-28 09:59:54,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:54,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:54,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:54,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:54,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-28 09:59:54,345 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 09:59:54,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-28 09:59:54,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 09:59:54,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 09:59:54,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-28 09:59:54,348 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2018-09-28 09:59:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:54,500 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2018-09-28 09:59:54,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 09:59:54,501 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-09-28 09:59:54,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:54,502 INFO L225 Difference]: With dead ends: 26 [2018-09-28 09:59:54,502 INFO L226 Difference]: Without dead ends: 24 [2018-09-28 09:59:54,503 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 [2018-09-28 09:59:54,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-28 09:59:54,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2018-09-28 09:59:54,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-28 09:59:54,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-09-28 09:59:54,514 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 11 [2018-09-28 09:59:54,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:54,514 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-09-28 09:59:54,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 09:59:54,515 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-09-28 09:59:54,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 09:59:54,516 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:54,516 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2018-09-28 09:59:54,516 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:54,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:54,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1980186676, now seen corresponding path program 1 times [2018-09-28 09:59:54,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:54,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:54,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:54,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:54,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:54,747 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:54,747 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 [2018-09-28 09:59:54,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:54,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:54,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:54,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 09:59:54,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 09:59:54,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 09:59:54,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 09:59:54,843 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2018-09-28 09:59:54,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:54,901 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2018-09-28 09:59:54,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 09:59:54,901 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-09-28 09:59:54,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:54,902 INFO L225 Difference]: With dead ends: 37 [2018-09-28 09:59:54,903 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 09:59:54,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 09:59:54,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 09:59:54,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-28 09:59:54,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 09:59:54,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-09-28 09:59:54,910 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-09-28 09:59:54,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:54,911 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-09-28 09:59:54,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 09:59:54,911 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-09-28 09:59:54,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 09:59:54,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:54,912 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 09:59:54,912 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:54,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:54,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1317950664, now seen corresponding path program 2 times [2018-09-28 09:59:54,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:54,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:54,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:54,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:54,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:55,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:55,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 09:59:55,068 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 09:59:55,095 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 09:59:55,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:55,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:55,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:55,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 09:59:55,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 09:59:55,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 09:59:55,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 09:59:55,133 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2018-09-28 09:59:55,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:55,227 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2018-09-28 09:59:55,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 09:59:55,228 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-09-28 09:59:55,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:55,229 INFO L225 Difference]: With dead ends: 39 [2018-09-28 09:59:55,229 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 09:59:55,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 09:59:55,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 09:59:55,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-28 09:59:55,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-28 09:59:55,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-28 09:59:55,236 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2018-09-28 09:59:55,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:55,236 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-28 09:59:55,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 09:59:55,237 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-28 09:59:55,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-28 09:59:55,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:55,238 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 09:59:55,238 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:55,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:55,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1142069956, now seen corresponding path program 3 times [2018-09-28 09:59:55,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:55,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:55,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:55,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:55,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:55,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:55,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:55,349 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 [2018-09-28 09:59:55,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 09:59:55,395 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-28 09:59:55,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:55,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:55,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:55,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 09:59:55,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 09:59:55,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 09:59:55,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 09:59:55,430 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2018-09-28 09:59:55,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:55,471 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2018-09-28 09:59:55,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 09:59:55,481 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2018-09-28 09:59:55,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:55,482 INFO L225 Difference]: With dead ends: 41 [2018-09-28 09:59:55,482 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 09:59:55,483 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 [2018-09-28 09:59:55,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 09:59:55,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-28 09:59:55,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-28 09:59:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-09-28 09:59:55,491 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2018-09-28 09:59:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:55,491 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-09-28 09:59:55,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 09:59:55,491 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-09-28 09:59:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 09:59:55,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:55,492 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 09:59:55,493 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:55,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:55,493 INFO L82 PathProgramCache]: Analyzing trace with hash -375565888, now seen corresponding path program 4 times [2018-09-28 09:59:55,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:55,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:55,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:55,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:55,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:55,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:55,726 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 [2018-09-28 09:59:55,742 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 09:59:55,777 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 09:59:55,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:55,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:55,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:55,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 09:59:55,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 09:59:55,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 09:59:55,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 09:59:55,814 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2018-09-28 09:59:55,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:55,903 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2018-09-28 09:59:55,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 09:59:55,905 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-09-28 09:59:55,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:55,907 INFO L225 Difference]: With dead ends: 43 [2018-09-28 09:59:55,907 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 09:59:55,908 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 [2018-09-28 09:59:55,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 09:59:55,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-28 09:59:55,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-28 09:59:55,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-09-28 09:59:55,920 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-09-28 09:59:55,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:55,920 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-09-28 09:59:55,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 09:59:55,924 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-09-28 09:59:55,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-28 09:59:55,925 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:55,925 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 09:59:55,925 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:55,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:55,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1465268668, now seen corresponding path program 5 times [2018-09-28 09:59:55,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:55,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:55,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:55,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:55,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:56,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:56,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 09:59:56,266 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 09:59:56,329 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 09:59:56,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:56,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:56,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:56,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 09:59:56,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 09:59:56,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 09:59:56,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 09:59:56,372 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2018-09-28 09:59:56,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:56,434 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-09-28 09:59:56,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 09:59:56,437 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-09-28 09:59:56,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:56,437 INFO L225 Difference]: With dead ends: 45 [2018-09-28 09:59:56,437 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 09:59:56,438 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 [2018-09-28 09:59:56,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 09:59:56,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-28 09:59:56,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 09:59:56,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-28 09:59:56,444 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2018-09-28 09:59:56,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:56,444 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-28 09:59:56,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 09:59:56,445 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-28 09:59:56,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 09:59:56,445 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:56,446 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 09:59:56,446 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:56,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:56,446 INFO L82 PathProgramCache]: Analyzing trace with hash 980751032, now seen corresponding path program 6 times [2018-09-28 09:59:56,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:56,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:56,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:56,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:56,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:56,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:56,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 09:59:56,700 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 09:59:56,739 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 09:59:56,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:56,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:56,780 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:56,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 09:59:56,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 09:59:56,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 09:59:56,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 09:59:56,782 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2018-09-28 09:59:56,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:56,850 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2018-09-28 09:59:56,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 09:59:56,851 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2018-09-28 09:59:56,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:56,852 INFO L225 Difference]: With dead ends: 47 [2018-09-28 09:59:56,852 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 09:59:56,853 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 [2018-09-28 09:59:56,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 09:59:56,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-28 09:59:56,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-28 09:59:56,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-09-28 09:59:56,859 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2018-09-28 09:59:56,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:56,859 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-09-28 09:59:56,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 09:59:56,860 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-09-28 09:59:56,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 09:59:56,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:56,861 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 09:59:56,861 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:56,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:56,861 INFO L82 PathProgramCache]: Analyzing trace with hash -784229196, now seen corresponding path program 7 times [2018-09-28 09:59:56,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:56,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:56,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:56,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:56,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:57,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:57,064 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 [2018-09-28 09:59:57,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:57,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:57,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:57,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 09:59:57,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 09:59:57,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 09:59:57,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 09:59:57,164 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2018-09-28 09:59:57,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:57,383 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-09-28 09:59:57,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 09:59:57,390 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-09-28 09:59:57,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:57,391 INFO L225 Difference]: With dead ends: 49 [2018-09-28 09:59:57,391 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 09:59:57,391 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 [2018-09-28 09:59:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 09:59:57,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-28 09:59:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-28 09:59:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-09-28 09:59:57,399 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2018-09-28 09:59:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:57,399 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-09-28 09:59:57,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 09:59:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-09-28 09:59:57,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 09:59:57,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:57,401 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 09:59:57,401 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:57,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:57,401 INFO L82 PathProgramCache]: Analyzing trace with hash -418146384, now seen corresponding path program 8 times [2018-09-28 09:59:57,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:57,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:57,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:57,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 09:59:57,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:57,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:57,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 09:59:57,656 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 09:59:57,697 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 09:59:57,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:57,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:57,733 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:57,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-28 09:59:57,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 09:59:57,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 09:59:57,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-28 09:59:57,734 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2018-09-28 09:59:57,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:57,968 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2018-09-28 09:59:57,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 09:59:57,969 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-09-28 09:59:57,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:57,969 INFO L225 Difference]: With dead ends: 51 [2018-09-28 09:59:57,970 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 09:59:57,970 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 [2018-09-28 09:59:57,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 09:59:57,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-28 09:59:57,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 09:59:57,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-09-28 09:59:57,981 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2018-09-28 09:59:57,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:57,982 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-09-28 09:59:57,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 09:59:57,982 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-09-28 09:59:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-28 09:59:57,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:57,987 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 09:59:57,989 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:57,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:57,990 INFO L82 PathProgramCache]: Analyzing trace with hash -799882324, now seen corresponding path program 9 times [2018-09-28 09:59:57,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:57,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:57,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:57,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:57,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:58,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:58,265 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 [2018-09-28 09:59:58,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 09:59:58,308 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-28 09:59:58,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:58,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:58,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:58,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-28 09:59:58,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 09:59:58,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 09:59:58,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:59:58,350 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 13 states. [2018-09-28 09:59:58,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:58,416 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2018-09-28 09:59:58,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 09:59:58,419 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2018-09-28 09:59:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:58,420 INFO L225 Difference]: With dead ends: 53 [2018-09-28 09:59:58,420 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 09:59:58,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-28 09:59:58,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 09:59:58,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-28 09:59:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-28 09:59:58,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-09-28 09:59:58,427 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2018-09-28 09:59:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:58,427 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-09-28 09:59:58,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 09:59:58,427 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-09-28 09:59:58,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 09:59:58,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:58,428 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 09:59:58,429 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:58,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:58,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1719066792, now seen corresponding path program 10 times [2018-09-28 09:59:58,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:58,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:58,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:58,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:58,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:58,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:58,632 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 [2018-09-28 09:59:58,639 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 09:59:58,681 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 09:59:58,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:58,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:58,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:58,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-28 09:59:58,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 09:59:58,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 09:59:58,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-28 09:59:58,728 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2018-09-28 09:59:58,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:58,880 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-09-28 09:59:58,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 09:59:58,881 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-09-28 09:59:58,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:58,881 INFO L225 Difference]: With dead ends: 55 [2018-09-28 09:59:58,881 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 09:59:58,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-28 09:59:58,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 09:59:58,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-28 09:59:58,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-28 09:59:58,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-09-28 09:59:58,889 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-09-28 09:59:58,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:58,890 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-09-28 09:59:58,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 09:59:58,890 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-09-28 09:59:58,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-28 09:59:58,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:58,891 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 09:59:58,891 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:58,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:58,892 INFO L82 PathProgramCache]: Analyzing trace with hash 67612324, now seen corresponding path program 11 times [2018-09-28 09:59:58,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:58,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:58,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:58,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:58,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:59,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:59,158 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 [2018-09-28 09:59:59,167 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 09:59:59,296 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-28 09:59:59,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 09:59:59,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 09:59:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:59,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 09:59:59,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-28 09:59:59,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 09:59:59,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 09:59:59,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-28 09:59:59,349 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-09-28 09:59:59,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 09:59:59,552 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2018-09-28 09:59:59,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 09:59:59,553 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-09-28 09:59:59,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 09:59:59,554 INFO L225 Difference]: With dead ends: 57 [2018-09-28 09:59:59,554 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 09:59:59,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-28 09:59:59,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 09:59:59,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-28 09:59:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 09:59:59,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-09-28 09:59:59,562 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2018-09-28 09:59:59,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 09:59:59,562 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-09-28 09:59:59,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 09:59:59,562 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-09-28 09:59:59,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-28 09:59:59,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 09:59:59,563 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 09:59:59,564 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 09:59:59,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 09:59:59,564 INFO L82 PathProgramCache]: Analyzing trace with hash -2137199200, now seen corresponding path program 12 times [2018-09-28 09:59:59,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 09:59:59,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 09:59:59,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:59,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 09:59:59,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 09:59:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 09:59:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 09:59:59,886 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 09:59:59,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 09:59:59,894 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:00,040 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-28 10:00:00,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:00,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:00,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:00,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-28 10:00:00,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:00:00,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:00:00,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-28 10:00:00,090 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 16 states. [2018-09-28 10:00:00,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:00,193 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2018-09-28 10:00:00,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:00:00,194 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2018-09-28 10:00:00,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:00,195 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:00:00,195 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:00:00,196 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 [2018-09-28 10:00:00,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:00:00,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-28 10:00:00,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-28 10:00:00,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-09-28 10:00:00,202 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2018-09-28 10:00:00,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:00,202 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-09-28 10:00:00,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:00:00,202 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-09-28 10:00:00,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-28 10:00:00,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:00,203 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:00,204 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:00,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:00,204 INFO L82 PathProgramCache]: Analyzing trace with hash 752770460, now seen corresponding path program 13 times [2018-09-28 10:00:00,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:00,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:00,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:00,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:00,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:00,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:00,569 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 [2018-09-28 10:00:00,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:00,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:00,672 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:00,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-28 10:00:00,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:00:00,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:00:00,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-28 10:00:00,674 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 17 states. [2018-09-28 10:00:00,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:00,969 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2018-09-28 10:00:00,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:00:00,973 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-09-28 10:00:00,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:00,974 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:00:00,974 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:00:00,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-28 10:00:00,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:00:00,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-28 10:00:00,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-28 10:00:00,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-09-28 10:00:00,983 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-09-28 10:00:00,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:00,983 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-09-28 10:00:00,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:00:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-09-28 10:00:00,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-28 10:00:00,984 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:00,984 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:00,985 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:00,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:00,985 INFO L82 PathProgramCache]: Analyzing trace with hash -830226792, now seen corresponding path program 14 times [2018-09-28 10:00:00,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:00,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:00,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:00,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:00,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:01,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:01,516 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 [2018-09-28 10:00:01,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:01,581 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:01,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:01,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:01,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:01,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-28 10:00:01,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:00:01,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:00:01,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-28 10:00:01,650 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 18 states. [2018-09-28 10:00:01,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:01,756 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2018-09-28 10:00:01,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:00:01,759 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2018-09-28 10:00:01,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:01,760 INFO L225 Difference]: With dead ends: 63 [2018-09-28 10:00:01,760 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:00:01,760 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 [2018-09-28 10:00:01,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:00:01,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-28 10:00:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-28 10:00:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-09-28 10:00:01,766 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2018-09-28 10:00:01,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:01,766 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-09-28 10:00:01,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:00:01,767 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-09-28 10:00:01,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-28 10:00:01,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:01,767 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:01,768 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:01,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:01,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1672163180, now seen corresponding path program 15 times [2018-09-28 10:00:01,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:01,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:01,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:01,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:01,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:02,730 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:02,730 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 [2018-09-28 10:00:02,738 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:02,801 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-28 10:00:02,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:02,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:02,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:02,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-28 10:00:02,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 10:00:02,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 10:00:02,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-28 10:00:02,849 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 19 states. [2018-09-28 10:00:02,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:02,977 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2018-09-28 10:00:02,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:00:02,978 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2018-09-28 10:00:02,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:02,979 INFO L225 Difference]: With dead ends: 65 [2018-09-28 10:00:02,979 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:00:02,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-28 10:00:02,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:00:02,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-28 10:00:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-28 10:00:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-09-28 10:00:02,986 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2018-09-28 10:00:02,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:02,986 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-09-28 10:00:02,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 10:00:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-09-28 10:00:02,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-28 10:00:02,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:02,987 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:02,988 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:02,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:02,988 INFO L82 PathProgramCache]: Analyzing trace with hash 975786896, now seen corresponding path program 16 times [2018-09-28 10:00:02,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:02,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:02,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:02,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:02,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:03,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:03,345 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 [2018-09-28 10:00:03,359 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:03,393 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:03,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:03,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:03,450 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:03,450 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-28 10:00:03,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:00:03,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:00:03,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:00:03,451 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 20 states. [2018-09-28 10:00:03,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:03,546 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2018-09-28 10:00:03,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:00:03,547 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2018-09-28 10:00:03,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:03,548 INFO L225 Difference]: With dead ends: 67 [2018-09-28 10:00:03,548 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:00:03,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:00:03,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:00:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-28 10:00:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-28 10:00:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2018-09-28 10:00:03,554 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2018-09-28 10:00:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:03,554 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2018-09-28 10:00:03,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:00:03,554 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2018-09-28 10:00:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-28 10:00:03,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:03,555 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:03,555 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:03,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:03,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1259796596, now seen corresponding path program 17 times [2018-09-28 10:00:03,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:03,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:03,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:03,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:03,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:03,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:03,898 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 [2018-09-28 10:00:03,907 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:03,949 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-28 10:00:03,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:03,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:03,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:03,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-28 10:00:03,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 10:00:03,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 10:00:03,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-28 10:00:03,995 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 21 states. [2018-09-28 10:00:04,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:04,196 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2018-09-28 10:00:04,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:00:04,197 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2018-09-28 10:00:04,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:04,198 INFO L225 Difference]: With dead ends: 69 [2018-09-28 10:00:04,198 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:00:04,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-28 10:00:04,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:00:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-28 10:00:04,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-28 10:00:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-09-28 10:00:04,203 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2018-09-28 10:00:04,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:04,203 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-09-28 10:00:04,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 10:00:04,204 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-09-28 10:00:04,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-28 10:00:04,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:04,204 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:04,205 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:04,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:04,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2123082888, now seen corresponding path program 18 times [2018-09-28 10:00:04,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:04,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:04,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:04,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:04,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:04,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:04,682 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 [2018-09-28 10:00:04,690 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:04,741 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-28 10:00:04,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:04,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:04,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:04,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-28 10:00:04,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:00:04,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:00:04,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-28 10:00:04,787 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2018-09-28 10:00:04,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:04,935 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2018-09-28 10:00:04,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:00:04,938 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2018-09-28 10:00:04,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:04,938 INFO L225 Difference]: With dead ends: 71 [2018-09-28 10:00:04,938 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:00:04,939 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 [2018-09-28 10:00:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:00:04,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-28 10:00:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-28 10:00:04,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2018-09-28 10:00:04,947 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2018-09-28 10:00:04,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:04,948 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2018-09-28 10:00:04,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:00:04,948 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2018-09-28 10:00:04,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-28 10:00:04,949 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:04,949 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:04,950 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:04,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:04,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1780023940, now seen corresponding path program 19 times [2018-09-28 10:00:04,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:04,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:04,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:04,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:04,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:05,808 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:05,808 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:00:05,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:05,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:05,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:05,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-28 10:00:05,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:00:05,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:00:05,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-28 10:00:05,914 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 23 states. [2018-09-28 10:00:06,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:06,041 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2018-09-28 10:00:06,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:00:06,042 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2018-09-28 10:00:06,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:06,043 INFO L225 Difference]: With dead ends: 73 [2018-09-28 10:00:06,043 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:00:06,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-28 10:00:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:00:06,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-28 10:00:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-28 10:00:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-09-28 10:00:06,049 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-09-28 10:00:06,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:06,050 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-09-28 10:00:06,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:00:06,050 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-09-28 10:00:06,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-28 10:00:06,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:06,051 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:06,051 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:06,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:06,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1482110592, now seen corresponding path program 20 times [2018-09-28 10:00:06,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:06,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:06,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:06,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:06,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:06,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:06,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:00:06,689 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:06,732 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:06,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:06,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:06,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:06,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-28 10:00:06,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:00:06,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:00:06,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-28 10:00:06,772 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 24 states. [2018-09-28 10:00:06,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:06,840 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-09-28 10:00:06,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:00:06,840 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2018-09-28 10:00:06,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:06,841 INFO L225 Difference]: With dead ends: 75 [2018-09-28 10:00:06,841 INFO L226 Difference]: Without dead ends: 61 [2018-09-28 10:00:06,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-28 10:00:06,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-28 10:00:06,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-28 10:00:06,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-28 10:00:06,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-09-28 10:00:06,847 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 58 [2018-09-28 10:00:06,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:06,847 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-09-28 10:00:06,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:00:06,847 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-09-28 10:00:06,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-28 10:00:06,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:06,849 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:06,849 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:06,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:06,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1067269764, now seen corresponding path program 21 times [2018-09-28 10:00:06,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:06,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:06,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:06,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:06,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:07,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:07,601 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 [2018-09-28 10:00:07,609 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:07,662 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-09-28 10:00:07,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:07,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:07,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:07,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-28 10:00:07,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-28 10:00:07,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-28 10:00:07,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-28 10:00:07,708 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 25 states. [2018-09-28 10:00:07,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:07,747 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2018-09-28 10:00:07,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:00:07,749 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2018-09-28 10:00:07,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:07,750 INFO L225 Difference]: With dead ends: 77 [2018-09-28 10:00:07,750 INFO L226 Difference]: Without dead ends: 63 [2018-09-28 10:00:07,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-28 10:00:07,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-28 10:00:07,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-28 10:00:07,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-28 10:00:07,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-09-28 10:00:07,755 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2018-09-28 10:00:07,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:07,755 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-09-28 10:00:07,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-28 10:00:07,755 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-09-28 10:00:07,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-28 10:00:07,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:07,756 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:07,756 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:07,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:07,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1837192584, now seen corresponding path program 22 times [2018-09-28 10:00:07,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:07,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:07,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:07,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:07,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:08,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:08,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:00:08,158 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:08,204 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:08,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:08,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:08,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:08,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-28 10:00:08,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:00:08,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:00:08,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-28 10:00:08,240 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 26 states. [2018-09-28 10:00:08,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:08,306 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2018-09-28 10:00:08,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:00:08,307 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-09-28 10:00:08,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:08,308 INFO L225 Difference]: With dead ends: 79 [2018-09-28 10:00:08,308 INFO L226 Difference]: Without dead ends: 65 [2018-09-28 10:00:08,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-28 10:00:08,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-28 10:00:08,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-28 10:00:08,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-28 10:00:08,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-09-28 10:00:08,312 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-09-28 10:00:08,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:08,312 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-09-28 10:00:08,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:00:08,312 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-09-28 10:00:08,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-28 10:00:08,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:08,313 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:08,313 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:08,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:08,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1296319604, now seen corresponding path program 23 times [2018-09-28 10:00:08,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:08,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:08,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:08,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:08,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:09,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:09,013 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 [2018-09-28 10:00:09,021 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:09,077 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-28 10:00:09,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:09,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:09,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:09,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-28 10:00:09,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-28 10:00:09,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-28 10:00:09,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-28 10:00:09,123 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 27 states. [2018-09-28 10:00:09,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:09,513 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2018-09-28 10:00:09,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:00:09,513 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2018-09-28 10:00:09,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:09,514 INFO L225 Difference]: With dead ends: 81 [2018-09-28 10:00:09,514 INFO L226 Difference]: Without dead ends: 67 [2018-09-28 10:00:09,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-28 10:00:09,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-28 10:00:09,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-28 10:00:09,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-28 10:00:09,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-09-28 10:00:09,522 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2018-09-28 10:00:09,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:09,522 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-09-28 10:00:09,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-28 10:00:09,523 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-09-28 10:00:09,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-28 10:00:09,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:09,523 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:09,524 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:09,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:09,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1829457776, now seen corresponding path program 24 times [2018-09-28 10:00:09,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:09,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:09,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:09,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:09,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:10,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:10,131 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 [2018-09-28 10:00:10,141 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:10,199 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-28 10:00:10,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:10,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:10,212 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:10,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:10,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-28 10:00:10,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:00:10,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:00:10,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-28 10:00:10,234 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 28 states. [2018-09-28 10:00:10,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:10,334 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2018-09-28 10:00:10,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:00:10,334 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2018-09-28 10:00:10,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:10,335 INFO L225 Difference]: With dead ends: 83 [2018-09-28 10:00:10,335 INFO L226 Difference]: Without dead ends: 69 [2018-09-28 10:00:10,336 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 [2018-09-28 10:00:10,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-28 10:00:10,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-28 10:00:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-28 10:00:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2018-09-28 10:00:10,340 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2018-09-28 10:00:10,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:10,340 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2018-09-28 10:00:10,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:00:10,341 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2018-09-28 10:00:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-28 10:00:10,341 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:10,341 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:10,341 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:10,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:10,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1220834452, now seen corresponding path program 25 times [2018-09-28 10:00:10,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:10,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:10,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:10,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:10,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:11,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:11,020 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 [2018-09-28 10:00:11,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:11,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:11,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:11,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-28 10:00:11,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:00:11,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:00:11,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-28 10:00:11,118 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 29 states. [2018-09-28 10:00:11,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:11,248 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2018-09-28 10:00:11,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:00:11,250 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 68 [2018-09-28 10:00:11,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:11,251 INFO L225 Difference]: With dead ends: 85 [2018-09-28 10:00:11,251 INFO L226 Difference]: Without dead ends: 71 [2018-09-28 10:00:11,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-28 10:00:11,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-28 10:00:11,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-28 10:00:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-28 10:00:11,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2018-09-28 10:00:11,257 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2018-09-28 10:00:11,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:11,258 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2018-09-28 10:00:11,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:00:11,258 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2018-09-28 10:00:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-28 10:00:11,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:11,259 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:11,259 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:11,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:11,259 INFO L82 PathProgramCache]: Analyzing trace with hash 910997608, now seen corresponding path program 26 times [2018-09-28 10:00:11,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:11,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:11,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:11,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:11,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:12,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:12,498 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 [2018-09-28 10:00:12,514 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:12,558 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:12,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:12,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:12,604 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:12,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-28 10:00:12,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:00:12,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:00:12,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-28 10:00:12,606 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 30 states. [2018-09-28 10:00:12,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:12,668 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2018-09-28 10:00:12,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:00:12,669 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2018-09-28 10:00:12,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:12,670 INFO L225 Difference]: With dead ends: 87 [2018-09-28 10:00:12,670 INFO L226 Difference]: Without dead ends: 73 [2018-09-28 10:00:12,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-28 10:00:12,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-28 10:00:12,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-28 10:00:12,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-28 10:00:12,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-09-28 10:00:12,674 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2018-09-28 10:00:12,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:12,675 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-09-28 10:00:12,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:00:12,675 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-09-28 10:00:12,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-28 10:00:12,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:12,675 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:12,676 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:12,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:12,677 INFO L82 PathProgramCache]: Analyzing trace with hash 902207076, now seen corresponding path program 27 times [2018-09-28 10:00:12,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:12,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:12,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:12,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:12,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:13,160 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:13,160 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 [2018-09-28 10:00:13,169 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:13,235 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-09-28 10:00:13,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:13,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:13,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:13,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-28 10:00:13,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-28 10:00:13,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-28 10:00:13,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-28 10:00:13,276 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 31 states. [2018-09-28 10:00:13,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:13,353 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2018-09-28 10:00:13,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:00:13,354 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2018-09-28 10:00:13,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:13,355 INFO L225 Difference]: With dead ends: 89 [2018-09-28 10:00:13,355 INFO L226 Difference]: Without dead ends: 75 [2018-09-28 10:00:13,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-28 10:00:13,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-28 10:00:13,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-28 10:00:13,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-28 10:00:13,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2018-09-28 10:00:13,361 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2018-09-28 10:00:13,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:13,361 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2018-09-28 10:00:13,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-28 10:00:13,361 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2018-09-28 10:00:13,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-28 10:00:13,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:13,362 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:13,362 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:13,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:13,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1044440416, now seen corresponding path program 28 times [2018-09-28 10:00:13,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:13,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:13,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:13,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:13,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:14,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:14,532 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 [2018-09-28 10:00:14,541 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:14,589 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:14,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:14,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:14,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:14,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-28 10:00:14,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:00:14,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:00:14,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:00:14,628 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 32 states. [2018-09-28 10:00:14,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:14,747 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2018-09-28 10:00:14,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:00:14,748 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 74 [2018-09-28 10:00:14,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:14,749 INFO L225 Difference]: With dead ends: 91 [2018-09-28 10:00:14,749 INFO L226 Difference]: Without dead ends: 77 [2018-09-28 10:00:14,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:00:14,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-28 10:00:14,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-28 10:00:14,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-28 10:00:14,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-09-28 10:00:14,756 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-09-28 10:00:14,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:14,756 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-09-28 10:00:14,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:00:14,756 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-09-28 10:00:14,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-28 10:00:14,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:14,757 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:14,757 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:14,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:14,757 INFO L82 PathProgramCache]: Analyzing trace with hash 291726684, now seen corresponding path program 29 times [2018-09-28 10:00:14,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:14,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:14,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:14,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:14,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:15,390 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:15,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:00:15,400 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:15,471 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-28 10:00:15,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:15,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:15,516 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:15,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-28 10:00:15,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-28 10:00:15,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-28 10:00:15,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-28 10:00:15,518 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 33 states. [2018-09-28 10:00:15,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:15,616 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2018-09-28 10:00:15,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:00:15,616 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 76 [2018-09-28 10:00:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:15,617 INFO L225 Difference]: With dead ends: 93 [2018-09-28 10:00:15,618 INFO L226 Difference]: Without dead ends: 79 [2018-09-28 10:00:15,619 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 [2018-09-28 10:00:15,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-28 10:00:15,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-28 10:00:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-28 10:00:15,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-09-28 10:00:15,623 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2018-09-28 10:00:15,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:15,624 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-09-28 10:00:15,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-28 10:00:15,624 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-09-28 10:00:15,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-28 10:00:15,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:15,624 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:15,625 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:15,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:15,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1511664040, now seen corresponding path program 30 times [2018-09-28 10:00:15,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:15,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:15,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:15,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:15,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:16,191 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:16,191 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 [2018-09-28 10:00:16,206 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:16,284 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-28 10:00:16,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:16,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:16,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:16,325 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-28 10:00:16,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:00:16,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:00:16,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 10:00:16,327 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 34 states. [2018-09-28 10:00:16,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:16,400 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2018-09-28 10:00:16,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:00:16,401 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2018-09-28 10:00:16,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:16,402 INFO L225 Difference]: With dead ends: 95 [2018-09-28 10:00:16,403 INFO L226 Difference]: Without dead ends: 81 [2018-09-28 10:00:16,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 10:00:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-28 10:00:16,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-28 10:00:16,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-28 10:00:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2018-09-28 10:00:16,408 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2018-09-28 10:00:16,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:16,408 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2018-09-28 10:00:16,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:00:16,408 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2018-09-28 10:00:16,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-28 10:00:16,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:16,409 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:16,409 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:16,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:16,409 INFO L82 PathProgramCache]: Analyzing trace with hash 596637780, now seen corresponding path program 31 times [2018-09-28 10:00:16,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:16,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:16,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:16,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:16,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:17,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:17,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:17,154 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 [2018-09-28 10:00:17,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:17,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:17,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:17,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-28 10:00:17,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:00:17,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:00:17,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-28 10:00:17,251 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 35 states. [2018-09-28 10:00:17,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:17,417 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2018-09-28 10:00:17,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:00:17,418 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 80 [2018-09-28 10:00:17,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:17,419 INFO L225 Difference]: With dead ends: 97 [2018-09-28 10:00:17,419 INFO L226 Difference]: Without dead ends: 83 [2018-09-28 10:00:17,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-28 10:00:17,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-28 10:00:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-28 10:00:17,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-28 10:00:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-09-28 10:00:17,424 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-09-28 10:00:17,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:17,424 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-09-28 10:00:17,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:00:17,424 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-09-28 10:00:17,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-28 10:00:17,425 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:17,425 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:17,425 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:17,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:17,425 INFO L82 PathProgramCache]: Analyzing trace with hash -549876912, now seen corresponding path program 32 times [2018-09-28 10:00:17,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:17,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:17,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:17,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:17,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:17,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:17,954 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 [2018-09-28 10:00:17,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:18,015 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:18,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:18,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:18,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:18,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-28 10:00:18,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:00:18,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:00:18,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 10:00:18,053 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 36 states. [2018-09-28 10:00:18,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:18,239 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2018-09-28 10:00:18,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:00:18,240 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 82 [2018-09-28 10:00:18,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:18,240 INFO L225 Difference]: With dead ends: 99 [2018-09-28 10:00:18,241 INFO L226 Difference]: Without dead ends: 85 [2018-09-28 10:00:18,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 10:00:18,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-28 10:00:18,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-28 10:00:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-28 10:00:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-09-28 10:00:18,246 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 82 [2018-09-28 10:00:18,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:18,246 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-09-28 10:00:18,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:00:18,247 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-09-28 10:00:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-28 10:00:18,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:18,247 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:18,247 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:18,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:18,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1456099148, now seen corresponding path program 33 times [2018-09-28 10:00:18,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:18,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:18,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:18,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:18,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:18,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:18,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:00:18,963 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:19,039 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-09-28 10:00:19,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:19,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:19,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:19,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-28 10:00:19,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-28 10:00:19,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-28 10:00:19,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-28 10:00:19,076 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 37 states. [2018-09-28 10:00:19,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:19,169 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2018-09-28 10:00:19,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:00:19,170 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 84 [2018-09-28 10:00:19,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:19,171 INFO L225 Difference]: With dead ends: 101 [2018-09-28 10:00:19,171 INFO L226 Difference]: Without dead ends: 87 [2018-09-28 10:00:19,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-28 10:00:19,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-28 10:00:19,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-28 10:00:19,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-28 10:00:19,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-09-28 10:00:19,177 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 84 [2018-09-28 10:00:19,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:19,178 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-09-28 10:00:19,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-28 10:00:19,178 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-09-28 10:00:19,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-28 10:00:19,178 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:19,178 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:19,179 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:19,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:19,179 INFO L82 PathProgramCache]: Analyzing trace with hash 758776904, now seen corresponding path program 34 times [2018-09-28 10:00:19,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:19,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:19,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:19,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:19,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:19,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:19,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:00:19,847 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:19,903 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:19,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:19,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:19,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:19,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-28 10:00:19,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:00:19,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:00:19,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:00:19,949 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 38 states. [2018-09-28 10:00:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:20,090 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2018-09-28 10:00:20,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:00:20,090 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 86 [2018-09-28 10:00:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:20,091 INFO L225 Difference]: With dead ends: 103 [2018-09-28 10:00:20,091 INFO L226 Difference]: Without dead ends: 89 [2018-09-28 10:00:20,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:00:20,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-28 10:00:20,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-28 10:00:20,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-28 10:00:20,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2018-09-28 10:00:20,097 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 86 [2018-09-28 10:00:20,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:20,097 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2018-09-28 10:00:20,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:00:20,097 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2018-09-28 10:00:20,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-28 10:00:20,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:20,098 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:20,098 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:20,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:20,098 INFO L82 PathProgramCache]: Analyzing trace with hash 646998596, now seen corresponding path program 35 times [2018-09-28 10:00:20,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:20,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:20,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:20,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:20,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:21,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:21,030 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 [2018-09-28 10:00:21,038 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:21,143 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-28 10:00:21,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:21,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:21,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:21,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:21,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-28 10:00:21,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-28 10:00:21,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-28 10:00:21,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-28 10:00:21,221 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 39 states. [2018-09-28 10:00:21,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:21,827 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2018-09-28 10:00:21,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:00:21,827 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 88 [2018-09-28 10:00:21,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:21,828 INFO L225 Difference]: With dead ends: 105 [2018-09-28 10:00:21,828 INFO L226 Difference]: Without dead ends: 91 [2018-09-28 10:00:21,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-28 10:00:21,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-28 10:00:21,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-28 10:00:21,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-28 10:00:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-28 10:00:21,835 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 88 [2018-09-28 10:00:21,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:21,836 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-28 10:00:21,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-28 10:00:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-28 10:00:21,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-28 10:00:21,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:21,836 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:21,837 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:21,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:21,837 INFO L82 PathProgramCache]: Analyzing trace with hash 602227008, now seen corresponding path program 36 times [2018-09-28 10:00:21,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:21,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:21,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:21,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:21,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:22,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:22,937 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 [2018-09-28 10:00:22,944 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:23,028 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-28 10:00:23,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:23,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:23,073 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:23,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-28 10:00:23,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:00:23,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:00:23,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-28 10:00:23,075 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 40 states. [2018-09-28 10:00:23,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:23,138 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2018-09-28 10:00:23,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:00:23,138 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 90 [2018-09-28 10:00:23,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:23,139 INFO L225 Difference]: With dead ends: 107 [2018-09-28 10:00:23,139 INFO L226 Difference]: Without dead ends: 93 [2018-09-28 10:00:23,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-28 10:00:23,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-28 10:00:23,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-28 10:00:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-28 10:00:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2018-09-28 10:00:23,143 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 90 [2018-09-28 10:00:23,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:23,144 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2018-09-28 10:00:23,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:00:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2018-09-28 10:00:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-28 10:00:23,144 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:23,144 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:23,145 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:23,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:23,145 INFO L82 PathProgramCache]: Analyzing trace with hash 526403900, now seen corresponding path program 37 times [2018-09-28 10:00:23,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:23,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:23,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:23,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:23,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:24,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:24,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:00:24,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:24,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:24,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:24,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-28 10:00:24,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:00:24,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:00:24,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-28 10:00:24,567 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 41 states. [2018-09-28 10:00:24,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:24,650 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2018-09-28 10:00:24,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:00:24,650 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 92 [2018-09-28 10:00:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:24,651 INFO L225 Difference]: With dead ends: 109 [2018-09-28 10:00:24,651 INFO L226 Difference]: Without dead ends: 95 [2018-09-28 10:00:24,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-28 10:00:24,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-28 10:00:24,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-28 10:00:24,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-28 10:00:24,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-09-28 10:00:24,657 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-09-28 10:00:24,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:24,657 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-09-28 10:00:24,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:00:24,657 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-09-28 10:00:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-28 10:00:24,658 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:24,658 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:24,658 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:24,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:24,658 INFO L82 PathProgramCache]: Analyzing trace with hash 674841144, now seen corresponding path program 38 times [2018-09-28 10:00:24,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:24,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:24,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:24,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:24,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:25,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:25,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:00:25,459 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:25,538 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:25,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:25,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:25,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:25,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-28 10:00:25,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-28 10:00:25,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-28 10:00:25,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-28 10:00:25,591 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 42 states. [2018-09-28 10:00:25,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:25,707 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2018-09-28 10:00:25,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-28 10:00:25,707 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 94 [2018-09-28 10:00:25,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:25,708 INFO L225 Difference]: With dead ends: 111 [2018-09-28 10:00:25,708 INFO L226 Difference]: Without dead ends: 97 [2018-09-28 10:00:25,709 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 [2018-09-28 10:00:25,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-28 10:00:25,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-28 10:00:25,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-28 10:00:25,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-09-28 10:00:25,714 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 94 [2018-09-28 10:00:25,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:25,714 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-09-28 10:00:25,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-28 10:00:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-09-28 10:00:25,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-28 10:00:25,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:25,715 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:25,715 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:25,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:25,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1589111860, now seen corresponding path program 39 times [2018-09-28 10:00:25,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:25,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:25,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:25,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:25,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:27,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:27,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:27,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:00:27,260 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:27,409 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-09-28 10:00:27,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:27,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:27,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:27,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-28 10:00:27,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-28 10:00:27,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-28 10:00:27,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-28 10:00:27,474 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 43 states. [2018-09-28 10:00:27,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:27,631 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2018-09-28 10:00:27,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:00:27,631 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 96 [2018-09-28 10:00:27,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:27,632 INFO L225 Difference]: With dead ends: 113 [2018-09-28 10:00:27,632 INFO L226 Difference]: Without dead ends: 99 [2018-09-28 10:00:27,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-28 10:00:27,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-28 10:00:27,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-28 10:00:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-28 10:00:27,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2018-09-28 10:00:27,639 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2018-09-28 10:00:27,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:27,640 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2018-09-28 10:00:27,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-28 10:00:27,640 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2018-09-28 10:00:27,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-28 10:00:27,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:27,641 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:27,641 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:27,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:27,641 INFO L82 PathProgramCache]: Analyzing trace with hash -265025744, now seen corresponding path program 40 times [2018-09-28 10:00:27,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:27,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:27,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:27,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:27,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:28,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:28,531 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 [2018-09-28 10:00:28,538 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:28,600 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:28,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:28,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:28,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:28,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-28 10:00:28,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:00:28,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:00:28,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:00:28,658 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 44 states. [2018-09-28 10:00:29,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:29,874 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2018-09-28 10:00:29,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-28 10:00:29,874 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 98 [2018-09-28 10:00:29,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:29,875 INFO L225 Difference]: With dead ends: 115 [2018-09-28 10:00:29,875 INFO L226 Difference]: Without dead ends: 101 [2018-09-28 10:00:29,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:00:29,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-28 10:00:29,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-28 10:00:29,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-28 10:00:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-28 10:00:29,879 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-09-28 10:00:29,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:29,880 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-28 10:00:29,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:00:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-28 10:00:29,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-28 10:00:29,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:29,881 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:29,881 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:29,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:29,881 INFO L82 PathProgramCache]: Analyzing trace with hash 320164652, now seen corresponding path program 41 times [2018-09-28 10:00:29,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:29,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:29,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:29,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:29,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:31,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:31,645 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 [2018-09-28 10:00:31,653 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:31,754 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-28 10:00:31,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:31,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:31,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:31,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-28 10:00:31,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-28 10:00:31,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-28 10:00:31,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-28 10:00:31,797 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 45 states. [2018-09-28 10:00:31,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:31,959 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2018-09-28 10:00:31,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 10:00:31,960 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 100 [2018-09-28 10:00:31,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:31,961 INFO L225 Difference]: With dead ends: 117 [2018-09-28 10:00:31,961 INFO L226 Difference]: Without dead ends: 103 [2018-09-28 10:00:31,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-28 10:00:31,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-28 10:00:31,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-28 10:00:31,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-28 10:00:31,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-09-28 10:00:31,968 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 100 [2018-09-28 10:00:31,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:31,969 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-09-28 10:00:31,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-28 10:00:31,969 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-09-28 10:00:31,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-28 10:00:31,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:31,970 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:31,970 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:31,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:31,970 INFO L82 PathProgramCache]: Analyzing trace with hash 47419432, now seen corresponding path program 42 times [2018-09-28 10:00:31,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:31,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:31,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:31,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:31,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:33,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:33,579 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 [2018-09-28 10:00:33,588 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:33,687 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-09-28 10:00:33,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:33,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:33,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:33,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-28 10:00:33,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-28 10:00:33,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-28 10:00:33,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:00:33,728 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 46 states. [2018-09-28 10:00:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:33,857 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2018-09-28 10:00:33,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-28 10:00:33,859 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 102 [2018-09-28 10:00:33,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:33,860 INFO L225 Difference]: With dead ends: 119 [2018-09-28 10:00:33,860 INFO L226 Difference]: Without dead ends: 105 [2018-09-28 10:00:33,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:00:33,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-28 10:00:33,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-28 10:00:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-28 10:00:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-09-28 10:00:33,866 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 102 [2018-09-28 10:00:33,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:33,867 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-09-28 10:00:33,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-28 10:00:33,867 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-09-28 10:00:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-28 10:00:33,867 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:33,867 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:33,868 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:33,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:33,868 INFO L82 PathProgramCache]: Analyzing trace with hash -67731932, now seen corresponding path program 43 times [2018-09-28 10:00:33,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:33,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:33,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:33,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:33,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:34,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:34,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:34,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:00:34,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:34,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:34,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:34,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-28 10:00:34,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-28 10:00:34,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-28 10:00:34,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 10:00:34,978 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-09-28 10:00:35,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:35,140 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2018-09-28 10:00:35,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:00:35,140 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-09-28 10:00:35,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:35,141 INFO L225 Difference]: With dead ends: 121 [2018-09-28 10:00:35,141 INFO L226 Difference]: Without dead ends: 107 [2018-09-28 10:00:35,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 10:00:35,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-28 10:00:35,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-28 10:00:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-28 10:00:35,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2018-09-28 10:00:35,148 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 104 [2018-09-28 10:00:35,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:35,148 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2018-09-28 10:00:35,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-28 10:00:35,148 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2018-09-28 10:00:35,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-28 10:00:35,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:35,149 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:35,149 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:35,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:35,150 INFO L82 PathProgramCache]: Analyzing trace with hash 940956960, now seen corresponding path program 44 times [2018-09-28 10:00:35,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:35,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:35,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:35,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:35,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:36,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:36,344 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 [2018-09-28 10:00:36,354 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:36,433 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:36,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:36,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:36,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:36,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-28 10:00:36,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-28 10:00:36,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-28 10:00:36,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:00:36,481 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 48 states. [2018-09-28 10:00:36,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:36,699 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2018-09-28 10:00:36,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 10:00:36,699 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 106 [2018-09-28 10:00:36,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:36,701 INFO L225 Difference]: With dead ends: 123 [2018-09-28 10:00:36,701 INFO L226 Difference]: Without dead ends: 109 [2018-09-28 10:00:36,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:00:36,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-28 10:00:36,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-28 10:00:36,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-28 10:00:36,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-09-28 10:00:36,708 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 106 [2018-09-28 10:00:36,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:36,708 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-09-28 10:00:36,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-28 10:00:36,708 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-09-28 10:00:36,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-28 10:00:36,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:36,709 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:36,709 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:36,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:36,710 INFO L82 PathProgramCache]: Analyzing trace with hash -371626724, now seen corresponding path program 45 times [2018-09-28 10:00:36,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:36,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:36,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:36,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:36,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:38,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:38,081 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 [2018-09-28 10:00:38,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:38,200 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-09-28 10:00:38,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:38,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:38,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:38,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-28 10:00:38,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-28 10:00:38,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-28 10:00:38,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-28 10:00:38,246 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 49 states. [2018-09-28 10:00:38,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:38,394 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2018-09-28 10:00:38,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:00:38,395 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 108 [2018-09-28 10:00:38,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:38,396 INFO L225 Difference]: With dead ends: 125 [2018-09-28 10:00:38,396 INFO L226 Difference]: Without dead ends: 111 [2018-09-28 10:00:38,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-28 10:00:38,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-28 10:00:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-28 10:00:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-28 10:00:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2018-09-28 10:00:38,403 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 108 [2018-09-28 10:00:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:38,403 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2018-09-28 10:00:38,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-28 10:00:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2018-09-28 10:00:38,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-28 10:00:38,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:38,404 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:38,404 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:38,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:38,404 INFO L82 PathProgramCache]: Analyzing trace with hash 955837976, now seen corresponding path program 46 times [2018-09-28 10:00:38,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:38,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:38,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:38,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:38,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:39,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:39,487 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 [2018-09-28 10:00:39,494 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:39,578 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:39,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:39,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:39,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:39,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-28 10:00:39,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-28 10:00:39,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-28 10:00:39,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:00:39,639 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 50 states. [2018-09-28 10:00:39,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:39,769 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2018-09-28 10:00:39,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-28 10:00:39,770 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 110 [2018-09-28 10:00:39,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:39,771 INFO L225 Difference]: With dead ends: 127 [2018-09-28 10:00:39,771 INFO L226 Difference]: Without dead ends: 113 [2018-09-28 10:00:39,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:00:39,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-28 10:00:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-28 10:00:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-28 10:00:39,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-09-28 10:00:39,780 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-09-28 10:00:39,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:39,780 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-09-28 10:00:39,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-28 10:00:39,780 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-09-28 10:00:39,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-28 10:00:39,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:39,781 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:39,782 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:39,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:39,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1044127764, now seen corresponding path program 47 times [2018-09-28 10:00:39,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:39,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:39,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:39,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:39,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:41,005 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:41,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:00:41,011 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:41,121 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-28 10:00:41,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:41,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:41,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:41,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-28 10:00:41,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-28 10:00:41,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-28 10:00:41,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-28 10:00:41,182 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 51 states. [2018-09-28 10:00:41,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:41,456 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2018-09-28 10:00:41,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-28 10:00:41,458 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 112 [2018-09-28 10:00:41,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:41,459 INFO L225 Difference]: With dead ends: 129 [2018-09-28 10:00:41,459 INFO L226 Difference]: Without dead ends: 115 [2018-09-28 10:00:41,460 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 [2018-09-28 10:00:41,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-28 10:00:41,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-28 10:00:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-28 10:00:41,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-28 10:00:41,467 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 112 [2018-09-28 10:00:41,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:41,467 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-28 10:00:41,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-28 10:00:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-28 10:00:41,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-28 10:00:41,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:41,468 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:41,468 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:41,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:41,469 INFO L82 PathProgramCache]: Analyzing trace with hash -8731888, now seen corresponding path program 48 times [2018-09-28 10:00:41,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:41,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:41,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:41,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:41,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:42,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:42,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:00:42,895 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:43,015 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-09-28 10:00:43,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:43,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:43,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:43,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-28 10:00:43,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-28 10:00:43,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-28 10:00:43,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-28 10:00:43,060 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 52 states. [2018-09-28 10:00:43,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:43,224 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2018-09-28 10:00:43,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-28 10:00:43,225 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 114 [2018-09-28 10:00:43,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:43,226 INFO L225 Difference]: With dead ends: 131 [2018-09-28 10:00:43,226 INFO L226 Difference]: Without dead ends: 117 [2018-09-28 10:00:43,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-28 10:00:43,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-28 10:00:43,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-28 10:00:43,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-28 10:00:43,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2018-09-28 10:00:43,234 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 114 [2018-09-28 10:00:43,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:43,235 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2018-09-28 10:00:43,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-28 10:00:43,235 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2018-09-28 10:00:43,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-28 10:00:43,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:43,236 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:43,236 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:43,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:43,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1805424396, now seen corresponding path program 49 times [2018-09-28 10:00:43,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:43,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:43,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:43,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:43,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:44,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:44,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:00:44,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:44,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:44,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:44,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-28 10:00:44,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-28 10:00:44,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-28 10:00:44,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-28 10:00:44,720 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand 53 states. [2018-09-28 10:00:45,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:45,180 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2018-09-28 10:00:45,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:00:45,180 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 116 [2018-09-28 10:00:45,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:45,181 INFO L225 Difference]: With dead ends: 133 [2018-09-28 10:00:45,182 INFO L226 Difference]: Without dead ends: 119 [2018-09-28 10:00:45,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-28 10:00:45,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-28 10:00:45,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-28 10:00:45,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-28 10:00:45,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-09-28 10:00:45,188 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-09-28 10:00:45,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:45,188 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-09-28 10:00:45,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-28 10:00:45,188 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-09-28 10:00:45,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-28 10:00:45,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:45,189 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:45,189 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:45,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:45,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1452891144, now seen corresponding path program 50 times [2018-09-28 10:00:45,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:45,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:45,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:45,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:45,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:46,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:46,228 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:00:46,235 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:46,308 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:46,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:46,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:46,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:46,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-28 10:00:46,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-28 10:00:46,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-28 10:00:46,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 10:00:46,372 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 54 states. [2018-09-28 10:00:46,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:46,675 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-09-28 10:00:46,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-28 10:00:46,676 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 118 [2018-09-28 10:00:46,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:46,677 INFO L225 Difference]: With dead ends: 135 [2018-09-28 10:00:46,677 INFO L226 Difference]: Without dead ends: 121 [2018-09-28 10:00:46,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 10:00:46,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-28 10:00:46,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-28 10:00:46,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-28 10:00:46,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-09-28 10:00:46,682 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 118 [2018-09-28 10:00:46,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:46,682 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-09-28 10:00:46,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-28 10:00:46,682 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-09-28 10:00:46,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-28 10:00:46,683 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:46,683 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:46,683 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:46,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:46,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1970852356, now seen corresponding path program 51 times [2018-09-28 10:00:46,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:46,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:46,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:46,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:46,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:48,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:48,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:00:48,091 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:48,223 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-09-28 10:00:48,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:48,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:48,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:48,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-28 10:00:48,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-28 10:00:48,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-28 10:00:48,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-28 10:00:48,288 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 55 states. [2018-09-28 10:00:48,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:48,568 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2018-09-28 10:00:48,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 10:00:48,569 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 120 [2018-09-28 10:00:48,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:48,570 INFO L225 Difference]: With dead ends: 137 [2018-09-28 10:00:48,570 INFO L226 Difference]: Without dead ends: 123 [2018-09-28 10:00:48,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-28 10:00:48,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-28 10:00:48,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-28 10:00:48,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-28 10:00:48,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2018-09-28 10:00:48,575 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 120 [2018-09-28 10:00:48,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:48,575 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2018-09-28 10:00:48,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-28 10:00:48,575 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2018-09-28 10:00:48,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-28 10:00:48,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:48,576 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:48,576 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:48,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:48,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1515370752, now seen corresponding path program 52 times [2018-09-28 10:00:48,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:48,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:48,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:48,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:48,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2880 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:49,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:49,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:00:49,686 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:49,769 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:49,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:49,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2880 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:49,864 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:49,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-28 10:00:49,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-28 10:00:49,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-28 10:00:49,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:00:49,865 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 56 states. [2018-09-28 10:00:50,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:50,601 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2018-09-28 10:00:50,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 10:00:50,602 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 122 [2018-09-28 10:00:50,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:50,602 INFO L225 Difference]: With dead ends: 139 [2018-09-28 10:00:50,602 INFO L226 Difference]: Without dead ends: 125 [2018-09-28 10:00:50,603 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 [2018-09-28 10:00:50,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-28 10:00:50,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-28 10:00:50,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-28 10:00:50,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2018-09-28 10:00:50,608 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 122 [2018-09-28 10:00:50,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:50,609 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2018-09-28 10:00:50,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-28 10:00:50,609 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2018-09-28 10:00:50,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-28 10:00:50,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:50,610 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:50,610 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:50,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:50,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1884213500, now seen corresponding path program 53 times [2018-09-28 10:00:50,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:50,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:50,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:50,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:50,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:51,911 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:51,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:00:51,924 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:52,115 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-28 10:00:52,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:52,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:52,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:52,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-28 10:00:52,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-28 10:00:52,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-28 10:00:52,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-28 10:00:52,171 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 57 states. [2018-09-28 10:00:52,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:52,415 INFO L93 Difference]: Finished difference Result 141 states and 145 transitions. [2018-09-28 10:00:52,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-28 10:00:52,416 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 124 [2018-09-28 10:00:52,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:52,416 INFO L225 Difference]: With dead ends: 141 [2018-09-28 10:00:52,417 INFO L226 Difference]: Without dead ends: 127 [2018-09-28 10:00:52,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-28 10:00:52,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-28 10:00:52,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-28 10:00:52,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-28 10:00:52,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-09-28 10:00:52,422 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 124 [2018-09-28 10:00:52,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:52,422 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-09-28 10:00:52,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-28 10:00:52,423 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-09-28 10:00:52,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-28 10:00:52,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:52,423 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:52,424 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:52,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:52,424 INFO L82 PathProgramCache]: Analyzing trace with hash -140191240, now seen corresponding path program 54 times [2018-09-28 10:00:52,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:52,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:52,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:52,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:52,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3098 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:53,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:53,789 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 [2018-09-28 10:00:53,798 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:53,933 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-09-28 10:00:53,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:53,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3098 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:53,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:53,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-28 10:00:53,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-28 10:00:53,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-28 10:00:53,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:00:53,996 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 58 states. [2018-09-28 10:00:54,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:54,211 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2018-09-28 10:00:54,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-28 10:00:54,211 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 126 [2018-09-28 10:00:54,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:54,212 INFO L225 Difference]: With dead ends: 143 [2018-09-28 10:00:54,212 INFO L226 Difference]: Without dead ends: 129 [2018-09-28 10:00:54,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:00:54,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-28 10:00:54,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-28 10:00:54,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-28 10:00:54,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-09-28 10:00:54,218 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 126 [2018-09-28 10:00:54,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:54,218 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-09-28 10:00:54,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-28 10:00:54,218 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-09-28 10:00:54,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-28 10:00:54,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:54,219 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:54,219 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:54,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:54,219 INFO L82 PathProgramCache]: Analyzing trace with hash 27038708, now seen corresponding path program 55 times [2018-09-28 10:00:54,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:54,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:54,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:54,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:54,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:55,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:55,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:00:55,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:55,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:55,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:55,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-28 10:00:55,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-28 10:00:55,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-28 10:00:55,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-28 10:00:55,637 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-09-28 10:00:55,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:55,796 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2018-09-28 10:00:55,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:00:55,796 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-09-28 10:00:55,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:55,797 INFO L225 Difference]: With dead ends: 145 [2018-09-28 10:00:55,797 INFO L226 Difference]: Without dead ends: 131 [2018-09-28 10:00:55,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-28 10:00:55,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-28 10:00:55,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-28 10:00:55,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-28 10:00:55,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-09-28 10:00:55,803 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-09-28 10:00:55,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:55,804 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-09-28 10:00:55,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-28 10:00:55,804 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-09-28 10:00:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-28 10:00:55,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:55,805 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:55,805 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:55,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:55,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1821228784, now seen corresponding path program 56 times [2018-09-28 10:00:55,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:55,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:55,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:55,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:55,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:57,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:57,247 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 [2018-09-28 10:00:57,255 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:57,342 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:57,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:57,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:57,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:57,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-28 10:00:57,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-28 10:00:57,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-28 10:00:57,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:00:57,406 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 60 states. [2018-09-28 10:00:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:57,772 INFO L93 Difference]: Finished difference Result 147 states and 151 transitions. [2018-09-28 10:00:57,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-28 10:00:57,772 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 130 [2018-09-28 10:00:57,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:57,773 INFO L225 Difference]: With dead ends: 147 [2018-09-28 10:00:57,773 INFO L226 Difference]: Without dead ends: 133 [2018-09-28 10:00:57,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:00:57,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-28 10:00:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-28 10:00:57,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-28 10:00:57,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-09-28 10:00:57,778 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 130 [2018-09-28 10:00:57,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:57,778 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-09-28 10:00:57,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-28 10:00:57,778 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-09-28 10:00:57,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-28 10:00:57,779 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:57,779 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:57,780 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:57,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:57,780 INFO L82 PathProgramCache]: Analyzing trace with hash -538961172, now seen corresponding path program 57 times [2018-09-28 10:00:57,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:57,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:57,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:57,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:57,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:59,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:59,094 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 [2018-09-28 10:00:59,105 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:59,255 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-09-28 10:00:59,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:59,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:00:59,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:59,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-28 10:00:59,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-28 10:00:59,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-28 10:00:59,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-28 10:00:59,301 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 61 states. [2018-09-28 10:00:59,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:59,405 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2018-09-28 10:00:59,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-28 10:00:59,406 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 132 [2018-09-28 10:00:59,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:59,407 INFO L225 Difference]: With dead ends: 149 [2018-09-28 10:00:59,407 INFO L226 Difference]: Without dead ends: 135 [2018-09-28 10:00:59,408 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 [2018-09-28 10:00:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-28 10:00:59,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-28 10:00:59,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-28 10:00:59,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2018-09-28 10:00:59,413 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 132 [2018-09-28 10:00:59,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:59,413 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2018-09-28 10:00:59,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-28 10:00:59,413 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2018-09-28 10:00:59,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-28 10:00:59,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:59,414 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:00:59,414 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:59,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:59,414 INFO L82 PathProgramCache]: Analyzing trace with hash -938776600, now seen corresponding path program 58 times [2018-09-28 10:00:59,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:59,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:59,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:59,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:59,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3558 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:00,950 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:00,951 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 [2018-09-28 10:01:00,958 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:01:01,041 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:01:01,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:01,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3558 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:01,094 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:01,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-28 10:01:01,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-28 10:01:01,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-28 10:01:01,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:01:01,095 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 62 states. [2018-09-28 10:01:01,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:01,275 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2018-09-28 10:01:01,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-28 10:01:01,276 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 134 [2018-09-28 10:01:01,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:01,277 INFO L225 Difference]: With dead ends: 151 [2018-09-28 10:01:01,277 INFO L226 Difference]: Without dead ends: 137 [2018-09-28 10:01:01,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:01:01,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-28 10:01:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-28 10:01:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-28 10:01:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-09-28 10:01:01,283 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-09-28 10:01:01,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:01,283 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-09-28 10:01:01,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-28 10:01:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-09-28 10:01:01,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-28 10:01:01,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:01,284 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:01,284 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:01,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:01,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1385653732, now seen corresponding path program 59 times [2018-09-28 10:01:01,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:01,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:01,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:01,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:01,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3678 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:03,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:03,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:01:03,041 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:01:03,189 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-28 10:01:03,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:03,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3678 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:03,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:03,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-28 10:01:03,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-28 10:01:03,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-28 10:01:03,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-28 10:01:03,254 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 63 states. [2018-09-28 10:01:03,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:03,406 INFO L93 Difference]: Finished difference Result 153 states and 157 transitions. [2018-09-28 10:01:03,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-28 10:01:03,407 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 136 [2018-09-28 10:01:03,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:03,408 INFO L225 Difference]: With dead ends: 153 [2018-09-28 10:01:03,408 INFO L226 Difference]: Without dead ends: 139 [2018-09-28 10:01:03,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-28 10:01:03,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-28 10:01:03,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-28 10:01:03,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-28 10:01:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-09-28 10:01:03,413 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 136 [2018-09-28 10:01:03,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:03,414 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-09-28 10:01:03,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-28 10:01:03,414 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-09-28 10:01:03,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-28 10:01:03,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:03,414 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:03,415 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:03,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:03,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1780208864, now seen corresponding path program 60 times [2018-09-28 10:01:03,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:03,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:03,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:03,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:03,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3800 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:04,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:04,894 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 [2018-09-28 10:01:04,902 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:01:05,058 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-09-28 10:01:05,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:05,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3800 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:05,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:05,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-28 10:01:05,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-28 10:01:05,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-28 10:01:05,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 10:01:05,112 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 64 states. [2018-09-28 10:01:05,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:05,240 INFO L93 Difference]: Finished difference Result 155 states and 159 transitions. [2018-09-28 10:01:05,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-28 10:01:05,240 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 138 [2018-09-28 10:01:05,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:05,241 INFO L225 Difference]: With dead ends: 155 [2018-09-28 10:01:05,242 INFO L226 Difference]: Without dead ends: 141 [2018-09-28 10:01:05,242 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 [2018-09-28 10:01:05,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-28 10:01:05,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-28 10:01:05,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-28 10:01:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2018-09-28 10:01:05,248 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 138 [2018-09-28 10:01:05,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:05,248 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2018-09-28 10:01:05,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-28 10:01:05,249 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2018-09-28 10:01:05,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-28 10:01:05,249 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:05,249 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:05,250 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:05,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:05,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1304398628, now seen corresponding path program 61 times [2018-09-28 10:01:05,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:05,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:05,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:05,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:05,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:06,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:06,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:06,761 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 [2018-09-28 10:01:06,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:06,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:06,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:06,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-28 10:01:06,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-28 10:01:06,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-28 10:01:06,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 10:01:06,910 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 65 states. [2018-09-28 10:01:07,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:07,127 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2018-09-28 10:01:07,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-28 10:01:07,128 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 140 [2018-09-28 10:01:07,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:07,129 INFO L225 Difference]: With dead ends: 157 [2018-09-28 10:01:07,129 INFO L226 Difference]: Without dead ends: 143 [2018-09-28 10:01:07,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 10:01:07,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-28 10:01:07,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-28 10:01:07,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-28 10:01:07,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-09-28 10:01:07,134 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-09-28 10:01:07,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:07,134 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-09-28 10:01:07,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-28 10:01:07,134 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-09-28 10:01:07,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-28 10:01:07,135 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:07,135 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:07,135 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:07,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:07,135 INFO L82 PathProgramCache]: Analyzing trace with hash -2084764200, now seen corresponding path program 62 times [2018-09-28 10:01:07,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:07,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:07,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:07,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:07,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:08,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:08,912 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 [2018-09-28 10:01:08,919 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:01:09,017 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:01:09,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:09,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:09,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:09,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-28 10:01:09,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-28 10:01:09,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-28 10:01:09,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 10:01:09,082 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 66 states. [2018-09-28 10:01:09,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:09,664 INFO L93 Difference]: Finished difference Result 159 states and 163 transitions. [2018-09-28 10:01:09,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-28 10:01:09,664 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 142 [2018-09-28 10:01:09,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:09,665 INFO L225 Difference]: With dead ends: 159 [2018-09-28 10:01:09,665 INFO L226 Difference]: Without dead ends: 145 [2018-09-28 10:01:09,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 10:01:09,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-28 10:01:09,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-28 10:01:09,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-28 10:01:09,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-09-28 10:01:09,673 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 142 [2018-09-28 10:01:09,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:09,673 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-09-28 10:01:09,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-28 10:01:09,673 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-09-28 10:01:09,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-28 10:01:09,674 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:09,674 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:09,674 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:09,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:09,675 INFO L82 PathProgramCache]: Analyzing trace with hash -396802092, now seen corresponding path program 63 times [2018-09-28 10:01:09,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:09,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:09,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:09,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:09,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4178 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:11,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:11,418 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 [2018-09-28 10:01:11,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:01:11,598 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-09-28 10:01:11,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:11,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4178 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:11,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:11,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-28 10:01:11,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-28 10:01:11,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-28 10:01:11,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-28 10:01:11,662 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 67 states. [2018-09-28 10:01:11,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:11,869 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2018-09-28 10:01:11,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-28 10:01:11,870 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 144 [2018-09-28 10:01:11,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:11,870 INFO L225 Difference]: With dead ends: 161 [2018-09-28 10:01:11,870 INFO L226 Difference]: Without dead ends: 147 [2018-09-28 10:01:11,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-28 10:01:11,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-28 10:01:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-28 10:01:11,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-28 10:01:11,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2018-09-28 10:01:11,877 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 144 [2018-09-28 10:01:11,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:11,878 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2018-09-28 10:01:11,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-28 10:01:11,878 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2018-09-28 10:01:11,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-28 10:01:11,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:11,879 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:11,879 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:11,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:11,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1762854192, now seen corresponding path program 64 times [2018-09-28 10:01:11,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:11,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:11,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:11,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:11,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:13,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4308 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:13,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:13,767 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 [2018-09-28 10:01:13,775 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:01:13,866 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:01:13,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:13,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4308 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:13,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:13,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-28 10:01:13,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-28 10:01:13,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-28 10:01:13,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:01:13,940 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 68 states. [2018-09-28 10:01:14,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:14,145 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2018-09-28 10:01:14,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-28 10:01:14,146 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 146 [2018-09-28 10:01:14,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:14,147 INFO L225 Difference]: With dead ends: 163 [2018-09-28 10:01:14,147 INFO L226 Difference]: Without dead ends: 149 [2018-09-28 10:01:14,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:01:14,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-28 10:01:14,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-28 10:01:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-28 10:01:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-09-28 10:01:14,155 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-09-28 10:01:14,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:14,155 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-09-28 10:01:14,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-28 10:01:14,155 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-09-28 10:01:14,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-28 10:01:14,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:14,156 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:14,157 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:14,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:14,157 INFO L82 PathProgramCache]: Analyzing trace with hash -278929716, now seen corresponding path program 65 times [2018-09-28 10:01:14,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:14,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:14,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:14,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:14,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4440 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:16,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:16,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:01:16,092 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:01:16,274 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-28 10:01:16,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:16,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4440 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:16,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:16,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-28 10:01:16,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-28 10:01:16,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-28 10:01:16,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-28 10:01:16,339 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 69 states. [2018-09-28 10:01:16,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:16,548 INFO L93 Difference]: Finished difference Result 165 states and 169 transitions. [2018-09-28 10:01:16,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-28 10:01:16,548 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 148 [2018-09-28 10:01:16,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:16,549 INFO L225 Difference]: With dead ends: 165 [2018-09-28 10:01:16,549 INFO L226 Difference]: Without dead ends: 151 [2018-09-28 10:01:16,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-28 10:01:16,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-28 10:01:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-28 10:01:16,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-28 10:01:16,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-09-28 10:01:16,557 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 148 [2018-09-28 10:01:16,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:16,557 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-09-28 10:01:16,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-28 10:01:16,557 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-09-28 10:01:16,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-28 10:01:16,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:16,558 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:16,558 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:16,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:16,559 INFO L82 PathProgramCache]: Analyzing trace with hash -156650552, now seen corresponding path program 66 times [2018-09-28 10:01:16,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:16,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:16,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:16,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:16,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:18,670 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:18,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:01:18,678 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:01:18,858 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-09-28 10:01:18,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:18,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:18,920 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:18,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-28 10:01:18,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-28 10:01:18,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-28 10:01:18,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:01:18,922 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 70 states. [2018-09-28 10:01:19,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:19,138 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2018-09-28 10:01:19,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-28 10:01:19,139 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 150 [2018-09-28 10:01:19,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:19,140 INFO L225 Difference]: With dead ends: 167 [2018-09-28 10:01:19,140 INFO L226 Difference]: Without dead ends: 153 [2018-09-28 10:01:19,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:01:19,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-28 10:01:19,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-28 10:01:19,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-28 10:01:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2018-09-28 10:01:19,145 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 150 [2018-09-28 10:01:19,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:19,145 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2018-09-28 10:01:19,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-28 10:01:19,145 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2018-09-28 10:01:19,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-28 10:01:19,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:19,146 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:19,146 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:19,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:19,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1389509060, now seen corresponding path program 67 times [2018-09-28 10:01:19,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:19,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:19,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:19,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:19,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:21,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:21,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:01:21,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:21,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:21,334 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:21,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-28 10:01:21,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-28 10:01:21,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-28 10:01:21,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-28 10:01:21,336 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand 71 states. [2018-09-28 10:01:21,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:21,553 INFO L93 Difference]: Finished difference Result 169 states and 173 transitions. [2018-09-28 10:01:21,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 10:01:21,554 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 152 [2018-09-28 10:01:21,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:21,555 INFO L225 Difference]: With dead ends: 169 [2018-09-28 10:01:21,555 INFO L226 Difference]: Without dead ends: 155 [2018-09-28 10:01:21,556 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 [2018-09-28 10:01:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-28 10:01:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-28 10:01:21,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-28 10:01:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-09-28 10:01:21,563 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-09-28 10:01:21,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:21,563 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-09-28 10:01:21,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-28 10:01:21,563 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-09-28 10:01:21,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-28 10:01:21,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:21,564 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:21,564 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:21,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:21,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1190211776, now seen corresponding path program 68 times [2018-09-28 10:01:21,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:21,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:21,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:21,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:21,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4848 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:23,692 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:23,692 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 [2018-09-28 10:01:23,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:01:23,794 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:01:23,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:23,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4848 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:23,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:23,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-28 10:01:23,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-28 10:01:23,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-28 10:01:23,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:01:23,865 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 72 states. [2018-09-28 10:01:24,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:24,450 INFO L93 Difference]: Finished difference Result 171 states and 175 transitions. [2018-09-28 10:01:24,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-28 10:01:24,450 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 154 [2018-09-28 10:01:24,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:24,451 INFO L225 Difference]: With dead ends: 171 [2018-09-28 10:01:24,452 INFO L226 Difference]: Without dead ends: 157 [2018-09-28 10:01:24,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:01:24,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-28 10:01:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-28 10:01:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-28 10:01:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-09-28 10:01:24,457 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 154 [2018-09-28 10:01:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:24,457 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-09-28 10:01:24,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-28 10:01:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-09-28 10:01:24,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-28 10:01:24,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:24,458 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:24,458 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:24,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:24,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1355917124, now seen corresponding path program 69 times [2018-09-28 10:01:24,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:24,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:24,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:24,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:24,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4988 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:26,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:26,318 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 [2018-09-28 10:01:26,325 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:01:26,534 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-09-28 10:01:26,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:26,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4988 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:26,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:26,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-28 10:01:26,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-28 10:01:26,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-28 10:01:26,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-28 10:01:26,598 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 73 states. [2018-09-28 10:01:26,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:26,738 INFO L93 Difference]: Finished difference Result 173 states and 177 transitions. [2018-09-28 10:01:26,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-28 10:01:26,738 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 156 [2018-09-28 10:01:26,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:26,739 INFO L225 Difference]: With dead ends: 173 [2018-09-28 10:01:26,739 INFO L226 Difference]: Without dead ends: 159 [2018-09-28 10:01:26,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-28 10:01:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-28 10:01:26,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-28 10:01:26,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-28 10:01:26,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2018-09-28 10:01:26,747 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 156 [2018-09-28 10:01:26,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:26,747 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2018-09-28 10:01:26,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-28 10:01:26,748 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2018-09-28 10:01:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-28 10:01:26,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:26,749 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:26,749 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:26,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:26,749 INFO L82 PathProgramCache]: Analyzing trace with hash -54431304, now seen corresponding path program 70 times [2018-09-28 10:01:26,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:26,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:26,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:26,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:26,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5130 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:29,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:29,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:01:29,050 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:01:29,153 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:01:29,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:29,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5130 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:29,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:29,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-28 10:01:29,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-28 10:01:29,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-28 10:01:29,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 10:01:29,214 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 74 states. [2018-09-28 10:01:29,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:29,463 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2018-09-28 10:01:29,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-28 10:01:29,463 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 158 [2018-09-28 10:01:29,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:29,464 INFO L225 Difference]: With dead ends: 175 [2018-09-28 10:01:29,465 INFO L226 Difference]: Without dead ends: 161 [2018-09-28 10:01:29,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 10:01:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-28 10:01:29,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-28 10:01:29,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-28 10:01:29,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-09-28 10:01:29,472 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 158 [2018-09-28 10:01:29,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:29,472 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-09-28 10:01:29,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-28 10:01:29,472 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-09-28 10:01:29,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-28 10:01:29,473 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:29,473 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:29,473 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:29,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:29,474 INFO L82 PathProgramCache]: Analyzing trace with hash 837958580, now seen corresponding path program 71 times [2018-09-28 10:01:29,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:29,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:29,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:29,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:29,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:31,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5274 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:31,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:31,690 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 [2018-09-28 10:01:31,697 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:01:31,892 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-28 10:01:31,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:31,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5274 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:31,944 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:31,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-28 10:01:31,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-28 10:01:31,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-28 10:01:31,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-28 10:01:31,946 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 75 states. [2018-09-28 10:01:32,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:32,100 INFO L93 Difference]: Finished difference Result 177 states and 181 transitions. [2018-09-28 10:01:32,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-28 10:01:32,100 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 160 [2018-09-28 10:01:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:32,101 INFO L225 Difference]: With dead ends: 177 [2018-09-28 10:01:32,102 INFO L226 Difference]: Without dead ends: 163 [2018-09-28 10:01:32,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-28 10:01:32,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-28 10:01:32,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-28 10:01:32,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-28 10:01:32,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-09-28 10:01:32,109 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 160 [2018-09-28 10:01:32,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:32,109 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-09-28 10:01:32,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-28 10:01:32,110 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-09-28 10:01:32,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-28 10:01:32,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:32,111 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:32,111 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:32,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:32,111 INFO L82 PathProgramCache]: Analyzing trace with hash -568822096, now seen corresponding path program 72 times [2018-09-28 10:01:32,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:32,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:32,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:32,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:32,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:34,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:34,495 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 [2018-09-28 10:01:34,502 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:01:34,745 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2018-09-28 10:01:34,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:34,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:34,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:34,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-28 10:01:34,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-28 10:01:34,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-28 10:01:34,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-28 10:01:34,799 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 76 states. [2018-09-28 10:01:35,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:35,051 INFO L93 Difference]: Finished difference Result 179 states and 183 transitions. [2018-09-28 10:01:35,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-28 10:01:35,052 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 162 [2018-09-28 10:01:35,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:35,053 INFO L225 Difference]: With dead ends: 179 [2018-09-28 10:01:35,053 INFO L226 Difference]: Without dead ends: 165 [2018-09-28 10:01:35,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-28 10:01:35,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-28 10:01:35,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-28 10:01:35,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-28 10:01:35,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2018-09-28 10:01:35,059 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 162 [2018-09-28 10:01:35,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:35,059 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2018-09-28 10:01:35,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-28 10:01:35,059 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2018-09-28 10:01:35,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-28 10:01:35,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:35,060 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:35,061 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:35,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:35,061 INFO L82 PathProgramCache]: Analyzing trace with hash 429646508, now seen corresponding path program 73 times [2018-09-28 10:01:35,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:35,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:35,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:35,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:35,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:37,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:37,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:01:37,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:37,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:37,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:37,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-28 10:01:37,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-28 10:01:37,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-28 10:01:37,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-28 10:01:37,423 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 77 states. [2018-09-28 10:01:37,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:37,588 INFO L93 Difference]: Finished difference Result 181 states and 185 transitions. [2018-09-28 10:01:37,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-28 10:01:37,588 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 164 [2018-09-28 10:01:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:37,590 INFO L225 Difference]: With dead ends: 181 [2018-09-28 10:01:37,590 INFO L226 Difference]: Without dead ends: 167 [2018-09-28 10:01:37,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-28 10:01:37,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-28 10:01:37,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-28 10:01:37,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-28 10:01:37,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-09-28 10:01:37,596 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-09-28 10:01:37,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:37,597 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-09-28 10:01:37,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-28 10:01:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-09-28 10:01:37,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-28 10:01:37,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:37,598 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:37,598 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:37,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:37,598 INFO L82 PathProgramCache]: Analyzing trace with hash -2114699352, now seen corresponding path program 74 times [2018-09-28 10:01:37,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:37,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:37,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:37,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:37,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:40,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:40,149 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:40,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:01:40,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:01:40,260 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:01:40,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:40,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:40,335 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:40,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-28 10:01:40,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-28 10:01:40,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-28 10:01:40,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-28 10:01:40,338 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 78 states. [2018-09-28 10:01:40,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:40,528 INFO L93 Difference]: Finished difference Result 183 states and 187 transitions. [2018-09-28 10:01:40,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-28 10:01:40,529 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 166 [2018-09-28 10:01:40,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:40,530 INFO L225 Difference]: With dead ends: 183 [2018-09-28 10:01:40,530 INFO L226 Difference]: Without dead ends: 169 [2018-09-28 10:01:40,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-28 10:01:40,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-28 10:01:40,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-28 10:01:40,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-28 10:01:40,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-09-28 10:01:40,536 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 166 [2018-09-28 10:01:40,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:40,536 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-09-28 10:01:40,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-28 10:01:40,536 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-09-28 10:01:40,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-28 10:01:40,537 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:40,537 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:40,537 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:40,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:40,538 INFO L82 PathProgramCache]: Analyzing trace with hash 900287908, now seen corresponding path program 75 times [2018-09-28 10:01:40,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:40,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:40,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:40,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:40,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5870 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:42,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:42,695 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 [2018-09-28 10:01:42,702 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:01:42,924 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2018-09-28 10:01:42,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:42,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5870 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:42,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:42,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-28 10:01:42,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-28 10:01:42,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-28 10:01:42,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-28 10:01:42,983 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 79 states. [2018-09-28 10:01:43,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:43,149 INFO L93 Difference]: Finished difference Result 185 states and 189 transitions. [2018-09-28 10:01:43,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-28 10:01:43,150 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 168 [2018-09-28 10:01:43,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:43,151 INFO L225 Difference]: With dead ends: 185 [2018-09-28 10:01:43,151 INFO L226 Difference]: Without dead ends: 171 [2018-09-28 10:01:43,151 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 [2018-09-28 10:01:43,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-28 10:01:43,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-28 10:01:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-28 10:01:43,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-09-28 10:01:43,157 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 168 [2018-09-28 10:01:43,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:43,157 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-09-28 10:01:43,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-28 10:01:43,157 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-09-28 10:01:43,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-28 10:01:43,158 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:43,158 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:43,158 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:43,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:43,158 INFO L82 PathProgramCache]: Analyzing trace with hash -799880032, now seen corresponding path program 76 times [2018-09-28 10:01:43,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:43,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:43,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:43,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:43,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6024 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:45,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:45,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:01:45,652 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:01:45,762 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:01:45,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:45,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6024 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:45,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:45,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-28 10:01:45,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-28 10:01:45,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-28 10:01:45,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-28 10:01:45,817 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 80 states. [2018-09-28 10:01:45,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:45,978 INFO L93 Difference]: Finished difference Result 187 states and 191 transitions. [2018-09-28 10:01:45,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-28 10:01:45,979 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 170 [2018-09-28 10:01:45,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:45,980 INFO L225 Difference]: With dead ends: 187 [2018-09-28 10:01:45,980 INFO L226 Difference]: Without dead ends: 173 [2018-09-28 10:01:45,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-28 10:01:45,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-28 10:01:45,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-28 10:01:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-28 10:01:45,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-09-28 10:01:45,989 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-09-28 10:01:45,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:45,989 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-09-28 10:01:45,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-28 10:01:45,989 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-09-28 10:01:45,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-28 10:01:45,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:45,990 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:45,990 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:45,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:45,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1721269404, now seen corresponding path program 77 times [2018-09-28 10:01:45,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:45,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:45,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:45,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:45,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6180 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:48,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:48,327 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 [2018-09-28 10:01:48,335 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:01:48,559 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-09-28 10:01:48,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:48,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6180 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:48,614 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:48,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-28 10:01:48,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-28 10:01:48,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-28 10:01:48,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-28 10:01:48,618 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 81 states. [2018-09-28 10:01:48,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:48,885 INFO L93 Difference]: Finished difference Result 189 states and 193 transitions. [2018-09-28 10:01:48,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-28 10:01:48,885 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 172 [2018-09-28 10:01:48,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:48,886 INFO L225 Difference]: With dead ends: 189 [2018-09-28 10:01:48,886 INFO L226 Difference]: Without dead ends: 175 [2018-09-28 10:01:48,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-28 10:01:48,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-28 10:01:48,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-28 10:01:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-28 10:01:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-28 10:01:48,894 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 172 [2018-09-28 10:01:48,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:48,894 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-28 10:01:48,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-28 10:01:48,894 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-28 10:01:48,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-28 10:01:48,895 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:48,895 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:48,895 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:48,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:48,896 INFO L82 PathProgramCache]: Analyzing trace with hash -2110644840, now seen corresponding path program 78 times [2018-09-28 10:01:48,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:48,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:48,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:48,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:48,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:51,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6338 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:51,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:51,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:01:51,252 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:01:51,477 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2018-09-28 10:01:51,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:51,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6338 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:51,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:51,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-28 10:01:51,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-28 10:01:51,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-28 10:01:51,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-28 10:01:51,535 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 82 states. [2018-09-28 10:01:51,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:51,843 INFO L93 Difference]: Finished difference Result 191 states and 195 transitions. [2018-09-28 10:01:51,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-28 10:01:51,844 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 174 [2018-09-28 10:01:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:51,845 INFO L225 Difference]: With dead ends: 191 [2018-09-28 10:01:51,845 INFO L226 Difference]: Without dead ends: 177 [2018-09-28 10:01:51,845 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 [2018-09-28 10:01:51,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-28 10:01:51,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-28 10:01:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-28 10:01:51,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2018-09-28 10:01:51,851 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 174 [2018-09-28 10:01:51,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:51,851 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2018-09-28 10:01:51,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-28 10:01:51,851 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2018-09-28 10:01:51,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-28 10:01:51,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:51,852 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:51,852 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:51,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:51,853 INFO L82 PathProgramCache]: Analyzing trace with hash 501706644, now seen corresponding path program 79 times [2018-09-28 10:01:51,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:51,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:51,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:51,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:51,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:54,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:54,504 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:54,504 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 [2018-09-28 10:01:54,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:54,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:54,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:54,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-28 10:01:54,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-28 10:01:54,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-28 10:01:54,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-28 10:01:54,678 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 83 states. [2018-09-28 10:01:54,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:54,880 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2018-09-28 10:01:54,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-28 10:01:54,880 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 176 [2018-09-28 10:01:54,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:54,881 INFO L225 Difference]: With dead ends: 193 [2018-09-28 10:01:54,881 INFO L226 Difference]: Without dead ends: 179 [2018-09-28 10:01:54,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-28 10:01:54,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-28 10:01:54,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-28 10:01:54,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-28 10:01:54,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2018-09-28 10:01:54,887 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 176 [2018-09-28 10:01:54,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:54,887 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2018-09-28 10:01:54,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-28 10:01:54,887 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2018-09-28 10:01:54,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-28 10:01:54,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:54,888 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:54,888 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:54,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:54,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1584385392, now seen corresponding path program 80 times [2018-09-28 10:01:54,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:54,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:54,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:54,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:54,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6660 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:57,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:57,310 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 [2018-09-28 10:01:57,317 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:01:57,426 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:01:57,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:57,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6660 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:01:57,487 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:57,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-28 10:01:57,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-28 10:01:57,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-28 10:01:57,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-28 10:01:57,489 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand 84 states. [2018-09-28 10:01:57,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:57,795 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-09-28 10:01:57,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-28 10:01:57,796 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 178 [2018-09-28 10:01:57,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:57,796 INFO L225 Difference]: With dead ends: 195 [2018-09-28 10:01:57,796 INFO L226 Difference]: Without dead ends: 181 [2018-09-28 10:01:57,797 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 [2018-09-28 10:01:57,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-28 10:01:57,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-28 10:01:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-28 10:01:57,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-09-28 10:01:57,803 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 178 [2018-09-28 10:01:57,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:57,803 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-09-28 10:01:57,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-28 10:01:57,803 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-09-28 10:01:57,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-28 10:01:57,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:57,804 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:01:57,804 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:57,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:57,804 INFO L82 PathProgramCache]: Analyzing trace with hash -569104756, now seen corresponding path program 81 times [2018-09-28 10:01:57,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:57,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:57,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:57,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:57,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6824 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:00,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:00,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:02:00,590 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:02:00,842 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 83 check-sat command(s) [2018-09-28 10:02:00,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:00,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6824 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:00,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:00,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-28 10:02:00,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-28 10:02:00,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-28 10:02:00,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-28 10:02:00,919 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 85 states. [2018-09-28 10:02:01,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:01,117 INFO L93 Difference]: Finished difference Result 197 states and 201 transitions. [2018-09-28 10:02:01,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-28 10:02:01,118 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 180 [2018-09-28 10:02:01,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:01,119 INFO L225 Difference]: With dead ends: 197 [2018-09-28 10:02:01,119 INFO L226 Difference]: Without dead ends: 183 [2018-09-28 10:02:01,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-28 10:02:01,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-28 10:02:01,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-28 10:02:01,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-28 10:02:01,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2018-09-28 10:02:01,126 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 180 [2018-09-28 10:02:01,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:01,126 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2018-09-28 10:02:01,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-28 10:02:01,127 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2018-09-28 10:02:01,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-28 10:02:01,127 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:01,128 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:02:01,128 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:01,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:01,128 INFO L82 PathProgramCache]: Analyzing trace with hash 158010248, now seen corresponding path program 82 times [2018-09-28 10:02:01,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:01,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:01,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:01,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:01,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6990 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:03,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:03,708 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 [2018-09-28 10:02:03,717 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:02:03,833 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:02:03,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:03,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6990 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:03,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:03,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-28 10:02:03,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-28 10:02:03,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-28 10:02:03,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-28 10:02:03,891 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 86 states. [2018-09-28 10:02:04,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:04,111 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2018-09-28 10:02:04,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-28 10:02:04,111 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 182 [2018-09-28 10:02:04,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:04,112 INFO L225 Difference]: With dead ends: 199 [2018-09-28 10:02:04,112 INFO L226 Difference]: Without dead ends: 185 [2018-09-28 10:02:04,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-28 10:02:04,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-28 10:02:04,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-28 10:02:04,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-28 10:02:04,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-28 10:02:04,118 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-09-28 10:02:04,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:04,119 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-28 10:02:04,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-28 10:02:04,119 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-28 10:02:04,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-28 10:02:04,120 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:04,120 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:02:04,120 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:04,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:04,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1164140156, now seen corresponding path program 83 times [2018-09-28 10:02:04,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:04,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:04,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:04,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:04,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7158 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:06,795 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:06,796 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:02:06,804 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:02:07,049 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-09-28 10:02:07,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:07,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7158 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:07,108 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:07,108 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-28 10:02:07,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-28 10:02:07,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-28 10:02:07,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-28 10:02:07,110 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 87 states. [2018-09-28 10:02:07,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:07,428 INFO L93 Difference]: Finished difference Result 201 states and 205 transitions. [2018-09-28 10:02:07,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-28 10:02:07,428 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 184 [2018-09-28 10:02:07,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:07,429 INFO L225 Difference]: With dead ends: 201 [2018-09-28 10:02:07,429 INFO L226 Difference]: Without dead ends: 187 [2018-09-28 10:02:07,430 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 [2018-09-28 10:02:07,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-28 10:02:07,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-28 10:02:07,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-28 10:02:07,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-09-28 10:02:07,438 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 184 [2018-09-28 10:02:07,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:07,438 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-09-28 10:02:07,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-28 10:02:07,438 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-09-28 10:02:07,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-28 10:02:07,439 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:07,439 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:02:07,439 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:07,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:07,440 INFO L82 PathProgramCache]: Analyzing trace with hash -440358784, now seen corresponding path program 84 times [2018-09-28 10:02:07,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:07,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:07,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:07,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:07,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7328 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:10,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:10,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:02:10,299 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:02:10,572 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-09-28 10:02:10,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:10,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7328 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:10,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:10,631 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-28 10:02:10,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-28 10:02:10,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-28 10:02:10,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-28 10:02:10,632 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 88 states. [2018-09-28 10:02:10,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:10,918 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2018-09-28 10:02:10,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-28 10:02:10,918 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 186 [2018-09-28 10:02:10,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:10,919 INFO L225 Difference]: With dead ends: 203 [2018-09-28 10:02:10,919 INFO L226 Difference]: Without dead ends: 189 [2018-09-28 10:02:10,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-28 10:02:10,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-28 10:02:10,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-28 10:02:10,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-28 10:02:10,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2018-09-28 10:02:10,927 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 186 [2018-09-28 10:02:10,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:10,927 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2018-09-28 10:02:10,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-28 10:02:10,928 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2018-09-28 10:02:10,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-28 10:02:10,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:10,928 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:02:10,929 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:10,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:10,929 INFO L82 PathProgramCache]: Analyzing trace with hash -671162244, now seen corresponding path program 85 times [2018-09-28 10:02:10,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:10,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:10,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:10,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:10,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:13,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:13,682 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 [2018-09-28 10:02:13,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:02:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:13,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:13,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:13,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-28 10:02:13,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-28 10:02:13,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-28 10:02:13,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-28 10:02:13,872 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 89 states. [2018-09-28 10:02:14,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:14,121 INFO L93 Difference]: Finished difference Result 205 states and 209 transitions. [2018-09-28 10:02:14,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-28 10:02:14,121 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 188 [2018-09-28 10:02:14,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:14,122 INFO L225 Difference]: With dead ends: 205 [2018-09-28 10:02:14,122 INFO L226 Difference]: Without dead ends: 191 [2018-09-28 10:02:14,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-28 10:02:14,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-28 10:02:14,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-28 10:02:14,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-28 10:02:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-09-28 10:02:14,130 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-09-28 10:02:14,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:14,130 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-09-28 10:02:14,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-28 10:02:14,130 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-09-28 10:02:14,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-28 10:02:14,131 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:14,131 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:02:14,131 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:14,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:14,131 INFO L82 PathProgramCache]: Analyzing trace with hash 865012088, now seen corresponding path program 86 times [2018-09-28 10:02:14,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:14,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:14,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:14,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:02:14,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7674 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:17,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:17,078 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 [2018-09-28 10:02:17,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:02:17,219 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:02:17,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:17,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7674 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:17,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:17,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-28 10:02:17,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-28 10:02:17,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-28 10:02:17,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-28 10:02:17,282 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 90 states. [2018-09-28 10:02:17,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:17,461 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2018-09-28 10:02:17,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-28 10:02:17,462 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 190 [2018-09-28 10:02:17,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:17,463 INFO L225 Difference]: With dead ends: 207 [2018-09-28 10:02:17,463 INFO L226 Difference]: Without dead ends: 193 [2018-09-28 10:02:17,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-28 10:02:17,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-28 10:02:17,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-28 10:02:17,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-28 10:02:17,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-09-28 10:02:17,470 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 190 [2018-09-28 10:02:17,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:17,471 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-09-28 10:02:17,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-28 10:02:17,471 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-09-28 10:02:17,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-28 10:02:17,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:17,472 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:02:17,472 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:17,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:17,472 INFO L82 PathProgramCache]: Analyzing trace with hash -340204684, now seen corresponding path program 87 times [2018-09-28 10:02:17,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:17,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:17,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:17,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:17,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7850 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:20,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:20,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:02:20,851 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:02:21,133 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 89 check-sat command(s) [2018-09-28 10:02:21,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:21,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7850 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:21,194 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:21,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-28 10:02:21,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-28 10:02:21,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-28 10:02:21,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-28 10:02:21,196 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 91 states. [2018-09-28 10:02:21,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:21,502 INFO L93 Difference]: Finished difference Result 209 states and 213 transitions. [2018-09-28 10:02:21,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-28 10:02:21,503 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 192 [2018-09-28 10:02:21,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:21,504 INFO L225 Difference]: With dead ends: 209 [2018-09-28 10:02:21,504 INFO L226 Difference]: Without dead ends: 195 [2018-09-28 10:02:21,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-28 10:02:21,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-28 10:02:21,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-28 10:02:21,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-28 10:02:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2018-09-28 10:02:21,511 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 192 [2018-09-28 10:02:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:21,511 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2018-09-28 10:02:21,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-28 10:02:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2018-09-28 10:02:21,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-28 10:02:21,512 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:21,512 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:02:21,512 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:21,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:21,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1087647344, now seen corresponding path program 88 times [2018-09-28 10:02:21,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:21,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:21,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:21,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:21,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8028 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:24,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:24,748 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 [2018-09-28 10:02:24,756 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:02:24,884 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:02:24,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:24,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8028 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:24,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:24,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-28 10:02:24,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-28 10:02:24,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-28 10:02:24,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-28 10:02:24,947 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 92 states. [2018-09-28 10:02:25,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:25,196 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2018-09-28 10:02:25,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-28 10:02:25,197 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 194 [2018-09-28 10:02:25,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:25,198 INFO L225 Difference]: With dead ends: 211 [2018-09-28 10:02:25,198 INFO L226 Difference]: Without dead ends: 197 [2018-09-28 10:02:25,199 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 [2018-09-28 10:02:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-28 10:02:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-28 10:02:25,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-28 10:02:25,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2018-09-28 10:02:25,204 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 194 [2018-09-28 10:02:25,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:25,205 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2018-09-28 10:02:25,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-28 10:02:25,205 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2018-09-28 10:02:25,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-28 10:02:25,206 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:25,206 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:02:25,206 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:25,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:25,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1136088468, now seen corresponding path program 89 times [2018-09-28 10:02:25,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:25,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:25,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:25,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:25,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8208 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:28,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:28,181 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 [2018-09-28 10:02:28,190 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:02:28,464 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2018-09-28 10:02:28,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:28,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8208 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:28,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:28,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-28 10:02:28,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-28 10:02:28,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-28 10:02:28,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-28 10:02:28,530 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand 93 states. [2018-09-28 10:02:28,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:28,873 INFO L93 Difference]: Finished difference Result 213 states and 217 transitions. [2018-09-28 10:02:28,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-28 10:02:28,874 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 196 [2018-09-28 10:02:28,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:28,875 INFO L225 Difference]: With dead ends: 213 [2018-09-28 10:02:28,875 INFO L226 Difference]: Without dead ends: 199 [2018-09-28 10:02:28,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-28 10:02:28,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-28 10:02:28,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-28 10:02:28,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-28 10:02:28,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-09-28 10:02:28,882 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 196 [2018-09-28 10:02:28,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:28,882 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-09-28 10:02:28,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-28 10:02:28,882 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-09-28 10:02:28,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-28 10:02:28,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:28,883 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:02:28,883 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:28,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:28,883 INFO L82 PathProgramCache]: Analyzing trace with hash 747509608, now seen corresponding path program 90 times [2018-09-28 10:02:28,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:28,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:28,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:28,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:28,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8390 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:32,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:32,221 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:02:32,245 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:02:32,524 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 92 check-sat command(s) [2018-09-28 10:02:32,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:32,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8390 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:32,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:32,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-28 10:02:32,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-28 10:02:32,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-28 10:02:32,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-28 10:02:32,590 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 94 states. [2018-09-28 10:02:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:32,789 INFO L93 Difference]: Finished difference Result 215 states and 219 transitions. [2018-09-28 10:02:32,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-28 10:02:32,789 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 198 [2018-09-28 10:02:32,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:32,790 INFO L225 Difference]: With dead ends: 215 [2018-09-28 10:02:32,790 INFO L226 Difference]: Without dead ends: 201 [2018-09-28 10:02:32,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-28 10:02:32,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-28 10:02:32,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-28 10:02:32,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-28 10:02:32,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2018-09-28 10:02:32,797 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 198 [2018-09-28 10:02:32,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:32,797 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2018-09-28 10:02:32,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-28 10:02:32,797 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2018-09-28 10:02:32,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-28 10:02:32,798 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:32,798 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:02:32,798 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:32,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:32,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1590938268, now seen corresponding path program 91 times [2018-09-28 10:02:32,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:32,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:32,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:32,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:32,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:36,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:36,638 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 [2018-09-28 10:02:36,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:02:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:36,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:36,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:36,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-28 10:02:36,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-28 10:02:36,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-28 10:02:36,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-28 10:02:36,852 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand 95 states. [2018-09-28 10:02:37,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:37,056 INFO L93 Difference]: Finished difference Result 217 states and 221 transitions. [2018-09-28 10:02:37,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-28 10:02:37,057 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 200 [2018-09-28 10:02:37,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:37,058 INFO L225 Difference]: With dead ends: 217 [2018-09-28 10:02:37,058 INFO L226 Difference]: Without dead ends: 203 [2018-09-28 10:02:37,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-28 10:02:37,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-28 10:02:37,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-28 10:02:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-28 10:02:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-09-28 10:02:37,064 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-09-28 10:02:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:37,064 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-09-28 10:02:37,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-28 10:02:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-09-28 10:02:37,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-28 10:02:37,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:37,065 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:02:37,066 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:37,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:37,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1723516000, now seen corresponding path program 92 times [2018-09-28 10:02:37,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:37,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:37,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:37,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:02:37,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8760 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:40,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:40,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:02:40,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:02:40,707 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:02:40,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:40,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8760 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:40,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:40,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-28 10:02:40,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-28 10:02:40,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-28 10:02:40,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-28 10:02:40,772 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 96 states. [2018-09-28 10:02:41,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:41,014 INFO L93 Difference]: Finished difference Result 219 states and 223 transitions. [2018-09-28 10:02:41,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-28 10:02:41,014 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 202 [2018-09-28 10:02:41,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:41,016 INFO L225 Difference]: With dead ends: 219 [2018-09-28 10:02:41,016 INFO L226 Difference]: Without dead ends: 205 [2018-09-28 10:02:41,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-28 10:02:41,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-28 10:02:41,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-28 10:02:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-28 10:02:41,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-09-28 10:02:41,025 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 202 [2018-09-28 10:02:41,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:41,025 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-09-28 10:02:41,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-28 10:02:41,025 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-09-28 10:02:41,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-28 10:02:41,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:41,026 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:02:41,026 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:41,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:41,026 INFO L82 PathProgramCache]: Analyzing trace with hash 48333916, now seen corresponding path program 93 times [2018-09-28 10:02:41,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:41,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:41,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:41,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:41,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:44,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8948 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:44,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:44,266 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 [2018-09-28 10:02:44,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:02:44,585 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 95 check-sat command(s) [2018-09-28 10:02:44,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:44,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8948 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:44,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:44,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-28 10:02:44,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-28 10:02:44,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-28 10:02:44,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-28 10:02:44,651 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 97 states. [2018-09-28 10:02:44,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:44,899 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2018-09-28 10:02:44,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-28 10:02:44,899 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 204 [2018-09-28 10:02:44,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:44,900 INFO L225 Difference]: With dead ends: 221 [2018-09-28 10:02:44,900 INFO L226 Difference]: Without dead ends: 207 [2018-09-28 10:02:44,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-28 10:02:44,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-28 10:02:44,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-28 10:02:44,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-28 10:02:44,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2018-09-28 10:02:44,910 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 204 [2018-09-28 10:02:44,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:44,911 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2018-09-28 10:02:44,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-28 10:02:44,911 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2018-09-28 10:02:44,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-28 10:02:44,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:44,912 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:02:44,912 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:44,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:44,912 INFO L82 PathProgramCache]: Analyzing trace with hash 811087192, now seen corresponding path program 94 times [2018-09-28 10:02:44,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:44,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:44,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:44,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:44,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9138 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:48,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:48,386 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 [2018-09-28 10:02:48,396 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:02:48,530 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:02:48,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:48,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9138 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:48,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:48,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-28 10:02:48,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-28 10:02:48,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-28 10:02:48,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-28 10:02:48,597 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand 98 states. [2018-09-28 10:02:48,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:48,791 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2018-09-28 10:02:48,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-28 10:02:48,791 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 206 [2018-09-28 10:02:48,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:48,792 INFO L225 Difference]: With dead ends: 223 [2018-09-28 10:02:48,792 INFO L226 Difference]: Without dead ends: 209 [2018-09-28 10:02:48,793 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 [2018-09-28 10:02:48,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-28 10:02:48,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-28 10:02:48,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-28 10:02:48,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-09-28 10:02:48,799 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-09-28 10:02:48,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:48,799 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-09-28 10:02:48,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-28 10:02:48,799 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-09-28 10:02:48,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-28 10:02:48,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:48,800 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:02:48,800 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:48,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:48,800 INFO L82 PathProgramCache]: Analyzing trace with hash -622422188, now seen corresponding path program 95 times [2018-09-28 10:02:48,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:48,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:48,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:48,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:48,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9330 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:52,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:52,504 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 [2018-09-28 10:02:52,512 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:02:52,826 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2018-09-28 10:02:52,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:52,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9330 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:52,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:52,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-28 10:02:52,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-28 10:02:52,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-28 10:02:52,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-28 10:02:52,895 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 99 states. [2018-09-28 10:02:53,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:53,242 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-09-28 10:02:53,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-28 10:02:53,242 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 208 [2018-09-28 10:02:53,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:53,243 INFO L225 Difference]: With dead ends: 225 [2018-09-28 10:02:53,244 INFO L226 Difference]: Without dead ends: 211 [2018-09-28 10:02:53,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-28 10:02:53,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-28 10:02:53,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-28 10:02:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-28 10:02:53,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-09-28 10:02:53,250 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 208 [2018-09-28 10:02:53,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:53,250 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-09-28 10:02:53,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-28 10:02:53,250 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-09-28 10:02:53,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-28 10:02:53,251 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:53,251 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:02:53,251 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:53,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:53,252 INFO L82 PathProgramCache]: Analyzing trace with hash 459565648, now seen corresponding path program 96 times [2018-09-28 10:02:53,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:53,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:53,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:53,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:53,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9524 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:56,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:56,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:02:56,989 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:02:57,301 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 98 check-sat command(s) [2018-09-28 10:02:57,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:57,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9524 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:02:57,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:57,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-28 10:02:57,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-28 10:02:57,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-28 10:02:57,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-28 10:02:57,371 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 100 states. [2018-09-28 10:02:57,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:57,695 INFO L93 Difference]: Finished difference Result 227 states and 231 transitions. [2018-09-28 10:02:57,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-28 10:02:57,695 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 210 [2018-09-28 10:02:57,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:57,696 INFO L225 Difference]: With dead ends: 227 [2018-09-28 10:02:57,696 INFO L226 Difference]: Without dead ends: 213 [2018-09-28 10:02:57,697 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 [2018-09-28 10:02:57,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-28 10:02:57,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-28 10:02:57,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-28 10:02:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2018-09-28 10:02:57,703 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 210 [2018-09-28 10:02:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:57,703 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2018-09-28 10:02:57,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-28 10:02:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2018-09-28 10:02:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-28 10:02:57,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:57,704 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:02:57,704 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:57,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:57,705 INFO L82 PathProgramCache]: Analyzing trace with hash 867790412, now seen corresponding path program 97 times [2018-09-28 10:02:57,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:57,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:57,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:57,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:57,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:01,587 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:01,587 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:03:01,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:01,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:01,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:01,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-28 10:03:01,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-28 10:03:01,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-28 10:03:01,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-28 10:03:01,801 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand 101 states. [2018-09-28 10:03:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:02,129 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2018-09-28 10:03:02,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-28 10:03:02,130 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 212 [2018-09-28 10:03:02,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:02,131 INFO L225 Difference]: With dead ends: 229 [2018-09-28 10:03:02,132 INFO L226 Difference]: Without dead ends: 215 [2018-09-28 10:03:02,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-28 10:03:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-28 10:03:02,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-28 10:03:02,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-28 10:03:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2018-09-28 10:03:02,141 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 212 [2018-09-28 10:03:02,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:02,141 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2018-09-28 10:03:02,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-28 10:03:02,141 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2018-09-28 10:03:02,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-28 10:03:02,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:02,142 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:03:02,142 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:02,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:02,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1965202616, now seen corresponding path program 98 times [2018-09-28 10:03:02,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:02,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:02,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:02,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:02,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:06,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9918 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:06,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:06,054 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 [2018-09-28 10:03:06,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:03:06,203 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:03:06,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:06,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9918 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:06,277 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:06,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-28 10:03:06,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-28 10:03:06,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-28 10:03:06,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-28 10:03:06,279 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand 102 states. [2018-09-28 10:03:06,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:06,624 INFO L93 Difference]: Finished difference Result 231 states and 235 transitions. [2018-09-28 10:03:06,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-28 10:03:06,624 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 214 [2018-09-28 10:03:06,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:06,625 INFO L225 Difference]: With dead ends: 231 [2018-09-28 10:03:06,625 INFO L226 Difference]: Without dead ends: 217 [2018-09-28 10:03:06,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-28 10:03:06,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-28 10:03:06,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-28 10:03:06,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-28 10:03:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2018-09-28 10:03:06,635 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 214 [2018-09-28 10:03:06,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:06,635 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2018-09-28 10:03:06,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-28 10:03:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2018-09-28 10:03:06,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-28 10:03:06,636 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:06,636 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:03:06,636 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:06,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:06,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1462236860, now seen corresponding path program 99 times [2018-09-28 10:03:06,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:06,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:06,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:06,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:06,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10118 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:10,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:10,396 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 [2018-09-28 10:03:10,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:03:10,779 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 101 check-sat command(s) [2018-09-28 10:03:10,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:10,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10118 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:10,847 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:10,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-28 10:03:10,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-28 10:03:10,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-28 10:03:10,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-28 10:03:10,849 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 103 states. [2018-09-28 10:03:11,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:11,280 INFO L93 Difference]: Finished difference Result 233 states and 237 transitions. [2018-09-28 10:03:11,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-28 10:03:11,281 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 216 [2018-09-28 10:03:11,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:11,281 INFO L225 Difference]: With dead ends: 233 [2018-09-28 10:03:11,282 INFO L226 Difference]: Without dead ends: 219 [2018-09-28 10:03:11,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-28 10:03:11,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-28 10:03:11,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-28 10:03:11,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-28 10:03:11,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2018-09-28 10:03:11,290 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 216 [2018-09-28 10:03:11,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:11,290 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2018-09-28 10:03:11,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-28 10:03:11,290 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2018-09-28 10:03:11,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-28 10:03:11,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:11,291 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:03:11,291 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:11,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:11,291 INFO L82 PathProgramCache]: Analyzing trace with hash 851517504, now seen corresponding path program 100 times [2018-09-28 10:03:11,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:11,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:11,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:11,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:11,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10320 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:15,095 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:15,095 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 [2018-09-28 10:03:15,103 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:03:15,242 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:03:15,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:15,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10320 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:15,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:15,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-28 10:03:15,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-28 10:03:15,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-28 10:03:15,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-28 10:03:15,310 INFO L87 Difference]: Start difference. First operand 219 states and 221 transitions. Second operand 104 states. [2018-09-28 10:03:15,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:15,838 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2018-09-28 10:03:15,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-28 10:03:15,839 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 218 [2018-09-28 10:03:15,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:15,840 INFO L225 Difference]: With dead ends: 235 [2018-09-28 10:03:15,840 INFO L226 Difference]: Without dead ends: 221 [2018-09-28 10:03:15,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-28 10:03:15,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-28 10:03:15,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-28 10:03:15,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-28 10:03:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-09-28 10:03:15,847 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 218 [2018-09-28 10:03:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:15,847 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-09-28 10:03:15,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-28 10:03:15,847 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-09-28 10:03:15,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-28 10:03:15,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:15,848 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:03:15,849 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:15,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:15,849 INFO L82 PathProgramCache]: Analyzing trace with hash -423598020, now seen corresponding path program 101 times [2018-09-28 10:03:15,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:15,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:15,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:15,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:15,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10524 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:19,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:19,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:03:19,808 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:03:20,147 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 103 check-sat command(s) [2018-09-28 10:03:20,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:20,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10524 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:20,218 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:20,219 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-28 10:03:20,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-28 10:03:20,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-28 10:03:20,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-28 10:03:20,220 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 105 states. [2018-09-28 10:03:20,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:20,749 INFO L93 Difference]: Finished difference Result 237 states and 241 transitions. [2018-09-28 10:03:20,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-28 10:03:20,749 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 220 [2018-09-28 10:03:20,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:20,750 INFO L225 Difference]: With dead ends: 237 [2018-09-28 10:03:20,750 INFO L226 Difference]: Without dead ends: 223 [2018-09-28 10:03:20,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-28 10:03:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-28 10:03:20,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-28 10:03:20,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-28 10:03:20,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2018-09-28 10:03:20,759 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 220 [2018-09-28 10:03:20,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:20,759 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2018-09-28 10:03:20,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-28 10:03:20,759 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2018-09-28 10:03:20,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-28 10:03:20,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:20,760 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:03:20,760 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:20,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:20,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1743937224, now seen corresponding path program 102 times [2018-09-28 10:03:20,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:20,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:20,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:20,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:20,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:20,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10730 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:24,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:24,765 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 [2018-09-28 10:03:24,773 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:03:25,124 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 104 check-sat command(s) [2018-09-28 10:03:25,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:25,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10730 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:25,226 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:25,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-28 10:03:25,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-28 10:03:25,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-28 10:03:25,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-28 10:03:25,228 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand 106 states. [2018-09-28 10:03:25,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:25,715 INFO L93 Difference]: Finished difference Result 239 states and 243 transitions. [2018-09-28 10:03:25,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-28 10:03:25,715 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 222 [2018-09-28 10:03:25,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:25,716 INFO L225 Difference]: With dead ends: 239 [2018-09-28 10:03:25,716 INFO L226 Difference]: Without dead ends: 225 [2018-09-28 10:03:25,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-28 10:03:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-09-28 10:03:25,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-09-28 10:03:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-28 10:03:25,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2018-09-28 10:03:25,723 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 222 [2018-09-28 10:03:25,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:25,723 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2018-09-28 10:03:25,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-28 10:03:25,723 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2018-09-28 10:03:25,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-28 10:03:25,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:25,723 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:03:25,724 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:25,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:25,724 INFO L82 PathProgramCache]: Analyzing trace with hash 720407348, now seen corresponding path program 103 times [2018-09-28 10:03:25,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:25,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:25,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:25,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:25,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10938 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:30,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:30,007 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 [2018-09-28 10:03:30,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:30,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:30,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10938 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:30,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:30,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-28 10:03:30,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-28 10:03:30,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-28 10:03:30,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-28 10:03:30,246 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand 107 states. [2018-09-28 10:03:30,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:30,542 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2018-09-28 10:03:30,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-28 10:03:30,543 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 224 [2018-09-28 10:03:30,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:30,543 INFO L225 Difference]: With dead ends: 241 [2018-09-28 10:03:30,544 INFO L226 Difference]: Without dead ends: 227 [2018-09-28 10:03:30,544 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 [2018-09-28 10:03:30,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-28 10:03:30,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-28 10:03:30,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-28 10:03:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2018-09-28 10:03:30,554 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 224 [2018-09-28 10:03:30,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:30,554 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2018-09-28 10:03:30,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-28 10:03:30,554 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2018-09-28 10:03:30,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-28 10:03:30,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:30,555 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:03:30,555 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:30,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:30,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1866406352, now seen corresponding path program 104 times [2018-09-28 10:03:30,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:30,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:30,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:30,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:30,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 11148 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:34,853 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:34,853 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 [2018-09-28 10:03:34,861 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:03:35,012 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:03:35,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:35,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11148 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:35,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:35,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-28 10:03:35,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-28 10:03:35,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-28 10:03:35,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-28 10:03:35,088 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand 108 states. [2018-09-28 10:03:35,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:35,456 INFO L93 Difference]: Finished difference Result 243 states and 247 transitions. [2018-09-28 10:03:35,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-28 10:03:35,457 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 226 [2018-09-28 10:03:35,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:35,457 INFO L225 Difference]: With dead ends: 243 [2018-09-28 10:03:35,457 INFO L226 Difference]: Without dead ends: 229 [2018-09-28 10:03:35,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-28 10:03:35,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-28 10:03:35,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-09-28 10:03:35,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-28 10:03:35,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2018-09-28 10:03:35,465 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 226 [2018-09-28 10:03:35,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:35,465 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2018-09-28 10:03:35,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-28 10:03:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2018-09-28 10:03:35,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-28 10:03:35,466 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:35,466 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:03:35,466 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:35,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:35,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1008307668, now seen corresponding path program 105 times [2018-09-28 10:03:35,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:35,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:35,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:35,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:35,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11360 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:39,934 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:39,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:03:39,942 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:03:40,330 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 107 check-sat command(s) [2018-09-28 10:03:40,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:40,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:40,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11360 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:40,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:40,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-28 10:03:40,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-28 10:03:40,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-28 10:03:40,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-28 10:03:40,405 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand 109 states. [2018-09-28 10:03:40,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:40,937 INFO L93 Difference]: Finished difference Result 245 states and 249 transitions. [2018-09-28 10:03:40,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-28 10:03:40,937 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 228 [2018-09-28 10:03:40,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:40,938 INFO L225 Difference]: With dead ends: 245 [2018-09-28 10:03:40,938 INFO L226 Difference]: Without dead ends: 231 [2018-09-28 10:03:40,939 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 [2018-09-28 10:03:40,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-28 10:03:40,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-28 10:03:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-28 10:03:40,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2018-09-28 10:03:40,946 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 228 [2018-09-28 10:03:40,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:40,946 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2018-09-28 10:03:40,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-28 10:03:40,946 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2018-09-28 10:03:40,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-28 10:03:40,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:40,947 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:03:40,947 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:40,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:40,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1009193176, now seen corresponding path program 106 times [2018-09-28 10:03:40,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:40,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:40,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:40,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:40,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11574 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:45,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:45,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:03:45,627 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:03:45,778 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:03:45,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:45,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11574 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-28 10:03:45,849 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:45,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-28 10:03:45,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-28 10:03:45,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-28 10:03:45,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-28 10:03:45,851 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 110 states. [2018-09-28 10:03:46,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:46,200 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2018-09-28 10:03:46,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-28 10:03:46,201 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 230 [2018-09-28 10:03:46,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:46,202 INFO L225 Difference]: With dead ends: 247 [2018-09-28 10:03:46,202 INFO L226 Difference]: Without dead ends: 233 [2018-09-28 10:03:46,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-28 10:03:46,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-09-28 10:03:46,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-09-28 10:03:46,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-09-28 10:03:46,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2018-09-28 10:03:46,210 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 230 [2018-09-28 10:03:46,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:46,210 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2018-09-28 10:03:46,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-28 10:03:46,210 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2018-09-28 10:03:46,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-28 10:03:46,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:46,211 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-28 10:03:46,211 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:46,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:46,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1860166364, now seen corresponding path program 107 times [2018-09-28 10:03:46,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:46,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:46,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:46,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:46,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-28 10:03:47,785 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:03:47,788 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:03:47,789 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:03:47 BoogieIcfgContainer [2018-09-28 10:03:47,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:03:47,789 INFO L168 Benchmark]: Toolchain (without parser) took 234902.59 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 565.7 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 213.6 MB). Peak memory consumption was 779.3 MB. Max. memory is 7.1 GB. [2018-09-28 10:03:47,791 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:03:47,791 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.81 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:03:47,792 INFO L168 Benchmark]: Boogie Preprocessor took 23.30 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:03:47,792 INFO L168 Benchmark]: RCFGBuilder took 282.60 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:03:47,792 INFO L168 Benchmark]: TraceAbstraction took 234545.11 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 565.7 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 192.5 MB). Peak memory consumption was 758.2 MB. Max. memory is 7.1 GB. [2018-09-28 10:03:47,794 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.81 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 23.30 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 282.60 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 234545.11 ms. Allocated memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: 565.7 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 192.5 MB). Peak memory consumption was 758.2 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 233 with TraceHistMax 109, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 59 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 234.4s OverallTime, 111 OverallIterations, 109 TraceHistogramMax, 25.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 990 SDtfs, 31 SDslu, 22141 SDs, 0 SdLazy, 12507 SolverSat, 191 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19155 GetRequests, 13263 SyntacticMatches, 0 SemanticMatches, 5892 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 177.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=233occurred in iteration=110, 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, 110 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.6s SsaConstructionTime, 14.8s SatisfiabilityAnalysisTime, 184.5s InterpolantComputationTime, 26547 NumberOfCodeBlocks, 26547 NumberOfCodeBlocksAsserted, 3096 NumberOfCheckSat, 26330 ConstructedInterpolants, 0 QuantifiedInterpolants, 11478164 SizeOfPredicates, 107 NumberOfNonLiveVariables, 64696 ConjunctsInSsa, 5992 ConjunctsInUnsatCore, 217 InterpolantComputations, 3 PerfectInterpolantSequences, 3828/843564 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-0-2018-09-28_10-03-47-802.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-0-2018-09-28_10-03-47-802.csv Completed graceful shutdown